Exploring the Depths of the Universe
|
|
- Kristina Harmon
- 6 years ago
- Views:
Transcription
1 Exploring the Depths of the Universe Jennifer Lotz Hubble Science Briefing Jan. 16, 2014
2 Hubble is now observing galaxies 97% of the way back to the Big Bang, during the first 500 million years 2
3 Challenge: Can we peer deeper into the Universe than the Hubble Ultra Deep Field before the launch of the James Webb Space Telescope? 3
4 Extragalactic Astronomy the speed of light is finite distance = look-back time 2. the universe is expanding distance = velocity 3. objects moving away from us look redder redshift = distance = look-back time 4
5 1. distance = time 8 minutes the Sun 3 million years Andromeda Earth 13 billion years distant galaxy 13.7 billion years We see distant objects as they were in the past because their light takes a long time to reach us echo of the Big Bang 5
6 Velocity away from our galaxy 2. distance = velocity the universe is expanding objects farther away are moving away faster Distance from our galaxy Hubble
7 3. velocity = redshift redshift = distance = time velocity N. Wright / The light from objects moving away from us is shifted redward. 7
8 Galaxy redshifts are primarily due to expansion of space, not Doppler shift distant galaxy Emitted blue light Earth Expanding universe stretches light to longer wavelengths Redshift z = stretch factor minus one stretched to green ESO animation: then red (or even infrared) when observed 8
9 Fainter (4. Astronomer s unit of brightness) Astronomers measure brightness in magnitudes Larger magnitudes are fainter (backwards!) Magnitude = -2.5 log10(brightness) Faintest star the human eye can see is 6 th magnitude Hubble Ultra Deep Field reaches 30 th magnitude = a factor of 4 billion times fainter than what we can see with naked eye Figure from Frontier Fields reaches ~10x fainter than Ultra Deep Field = 40 billion times fainter than human eye can see. 9
10 visible light 10
11 when the universe was young.. blue = 0.0 K green = 2.7 K red = 4.0 K 380,000 years after the Big Bang microwaves NASA/WMAP Science team 11
12 When the universe was young... blue = K green = K red = K 380,000 years after the Big Bang NASA/WMAP Science team 12
13 from the Big Bang to the Milky Way 13
14 The Hubble Deep Field
15 The Hubble Deep Field South
16 The Hubble Ultra Deep Field new camera on Hubble = new deep field 16
17 Science Highlights from Deep Fields detection of faint galaxies at look-back times < 1 billion years after the Big Bang cosmic star-formation history peaked ~ 10 billion years ago Galaxies grew in size and mass over this time, and changed their shapes from irregular to smooth Most distant supernovae used to measure distance, confirm accelerating universe Accreting supermassive black holes are found in galaxies at look-back times as early as billion years ago. 17
18 How far away are galaxies? Hydrogen atom excitation levels Hydrogen atoms absorbs ultraviolet light from distant galaxies; this Lyman break is used to estimate their redshift. 18
19 The Hubble Ultra Deep Field -2009/2012 new camera on Hubble = new deep field 19
20 Cosmic star formation density The Hubble Ultra Deep Field -2009/2012 deep infrared images needed to detect the highest redshift galaxies Redshift/time since Big Bang 20
21 most distant galaxy candidate NASA/HST the Ultra Deep Field 21
22 Challenge: Can we peer deeper into the Universe than the Hubble Ultra Deep Field before the launch of the James Webb Space Telescope? posed to the Hubble Deep Fields Initiative science working group to develop an ambitious new community deep fields program HUDF ACS (optical) = 416 orbits WFC3 (IR) = 163 orbits =579 orbits of HST
23 Gravitational lensing in action Credit: Ann Feild (STScI) 23
24 Gravitational Lensing 24
25 Wine Glass Lensing Phil Marshall 25
26 26
27 Challenge: Can we peer deeper into the Universe than the Hubble Ultra Deep Field before the launch of the James Webb Space Telescope? 27
28 Answer: Use Einstein s theory of general relativity - gravitational lensing - to go intrinsically deeper than the Ultra Deep Field. Gravitational lensing magnifies and stretches light from distant galaxies behind massive clusters, making them appear brighter and larger. Six very massive clusters of galaxies chosen as the best zoom lenses, with input from community. The Frontier Fields are being observed by NASA s Great Observatories - Hubble, Spitzer, and Chandra - over the next 3 years. 28
29 Frontier Fields will also observe 6 fields in parallel with the clusters, the second deepest observations of blank fields ever obtained. Simultaneous images are taken with Hubble s infrared camera WFC3/IR and the optical camera ACS; cameras will swap positions ~6 months later. 29
30 Deep observations of the Frontier Fields will: probe galaxies 10-20x intrinsically fainter than any seen before, particularly those in the first billion years of the Universe study the early formation histories of galaxies intrinsically faint enough to be the early progenitors of the Milky Way study internal properties of highly-magnified galaxies at high spatial resolutions provide a statistical picture of galaxy formation at early times 30
31 Deep observations of the Frontier Fields will: + map out dark matter, substructure in clusters + use 100s of multiple images as probe of distance, DE + search for (lensed) SN, transients in distant universe + deep and high-spatial resolution studies of z~1-4 galaxies, (UV escape fraction, sub-kpc structures and star-formation) + search for trans-neptunian objects in solar system + give parallaxes of Milky Way stars +??? 31
32 Spitzer Frontier Fields Infrared Spitzer Space Telescope will look at Frontier Fields in 2 filters redder than Hubble can see to depths of ~26.5 magnitude Spitzer crucial for confirming the distant galaxies, measuring their total stellar masses 32
33 Chandra Frontier Fields MACS C. Jones-Forman MACS S. Murray X-ray detect hot cluster gas cluster mass and background accreting black holes archival Chandra data available for all of Frontier Fields; Chandra FOV encompasses both cluster + parallel fields new observations began this fall 33
34 HST Frontier Fields: Clusters Avoid dusty, bright regions of sky; visible from south (ALMA) and north (Mauna Kea) 34
35 HST Frontier Fields Abell 2744 MACSJ MACSJ MACSJ Abell370 Abell S1063 Hubble will observe 2 cluster per year, over 3 years 140 orbits per cluster 35
36 Abell HST Epoch 1 completed November 2013 Cluster Parallel Blank Field 36
37 Abell HST Epoch 1 completed November 2013 Cluster Parallel Blank Field 37
38 Abell 2744 Parallel Blank Field 38
39 Abell 2744 Cluster 39
40 Abell 2744 Cluster 40
41 Abell 2744 Cluster 41
42 Abell 2744 Cluster a model of the cluster s optics gives us the magnification power model credit: J. Richard, CATS team 42
43 background galaxies are magnified by factors up to ~10-20, providing the deepest yet view of the universe 43
44 lensed galaxies background galaxies are magnified by factors up to ~10-20, providing the deepest yet view of the universe 44
45 Number of galaxies Number of galaxies Abell parallels are very very deep Fainter Fainter Optical ACS images (blue, green, yellow) reach ~29 th magnitude (dashed line) Infrared WFC3/IR images (orange, pink, red, dark-red) >~28.7 magnitude (observed magnitudes, not intrinsic magnitudes) 45
46 Number of galaxies Deepest view yet into the distant universe: Observed Fainter HUDF12 Intrinsically Fainter HUDF12 Take observed fluxes x lensing magnifications (average ~1.8x, max ~80x) intrinsically faintest Frontier Fields galaxies ~2.5 magnitudes (10x) fainter than Ultra Deep Field (blue dashed line) 46
47 Exploring the Depths of the Universe The Frontier Fields is combining the power of nature s telescopes - massive clusters of galaxies - with HST to provide the intrinsically deepest view of the universe yet. Parallel imaging is providing the second deepest observations of blank fields, and improve our statistical understanding of most distant and faint galaxies. NASA s Great Observatories -- Hubble, Spitzer, and Chandra - will observe the Frontier Field clusters and parallel fields over the next 3 years. The first set of Hubble observations of Abell 2744 are complete, and images have been publicly released. These reveal thousands of distant galaxies, many at intrinsic luminosities ~10 times fainter than ever seen before
48 Exploring the Depths of the Universe Jennifer Lotz, Matt Mountain, & the Frontier Fields Team Space Telescope Science Institute,Spitzer Science Center contact: 48
A Look Back: Galaxies at Cosmic Dawn Revealed in the First Year of the Hubble Frontier Fields Initiative
A Look Back: Galaxies at Cosmic Dawn Revealed in the First Year of the Hubble Frontier Fields Initiative Dr. Gabriel Brammer (ESA/AURA, STScI) Hubble Science Briefing / November 6, 2014 1 The Early Universe
More informationAstro 101 Slide Set: Multiple Views of an Extremely Distant Galaxy
Astro 101 Slide Set: Multiple Views of an Extremely Distant Galaxy A Discovery from the Hubble Frontier Fields Program Topic: Distant galaxies Concepts: Galaxy development, Gravitational lensing Missions:
More informationAstronomers discover an active, bright galaxy "in its infancy"
Astronomers discover an active, bright galaxy "in its infancy" By Los Angeles Times, adapted by Newsela staff on 05.18.15 Word Count 825 The galaxy EGS-zs8-1, the most distant galaxy yet seen, was discovered
More informationHigh Redshift Universe
High Redshift Universe Finding high z galaxies Lyman break galaxies (LBGs) Photometric redshifts Deep fields Starburst galaxies Extremely red objects (EROs) Sub-mm galaxies Lyman α systems Finding high
More informationThe Milky Way, Hubble Law, the expansion of the Universe and Dark Matter Chapter 14 and 15 The Milky Way Galaxy and the two Magellanic Clouds.
The Milky Way, Hubble Law, the expansion of the Universe and Dark Matter Chapter 14 and 15 The Milky Way Galaxy and the two Magellanic Clouds. Image taken from the European Southern Observatory in Chile
More informationGalaxy Collisions & the Origin of Starburst Galaxies & Quasars. February 24, 2003 Hayden Planetarium
Galaxy Collisions & the Origin of Starburst Galaxies & Quasars February 24, 2003 Hayden Planetarium Normal massive galaxy types elliptical & spiral galaxies Spiral Bulge of old stars Large black hole Very
More informationGalaxies. The majority of known galaxies fall into one of three major classes: spirals (78 %), ellipticals (18 %) and irregulars (4 %).
Galaxies Collection of stars, gas and dust bound together by their common gravitational pull. Galaxies range from 10,000 to 200,000 light-years in size. 1781 Charles Messier 1923 Edwin Hubble The distribution
More informationBUILDING GALAXIES. Question 1: When and where did the stars form?
BUILDING GALAXIES The unprecedented accuracy of recent observations of the power spectrum of the cosmic microwave background leaves little doubt that the universe formed in a hot big bang, later cooling
More informationThe Making of the Hubble Ultra Deep Field
The Making of the Hubble Ultra Deep Field Hubble Science Briefing October 4, 2012 Massimo Stiavelli Space Telescope Science Institute Bold methods and new technology - What happens if you point the most
More informationBeyond Our Solar System Chapter 24
Beyond Our Solar System Chapter 24 PROPERTIES OF STARS Distance Measuring a star's distance can be very difficult Stellar parallax Used for measuring distance to a star Apparent shift in a star's position
More informationCHAPTER 28 STARS AND GALAXIES
CHAPTER 28 STARS AND GALAXIES 28.1 A CLOSER LOOK AT LIGHT Light is a form of electromagnetic radiation, which is energy that travels in waves. Waves of energy travel at 300,000 km/sec (speed of light Ex:
More informationA Search for High Redshift Galaxies behind Gravitationally Lensing Clusters
A Search for High Redshift Galaxies behind Gravitationally Lensing Clusters Ota et al.2011 submitted to Monthly Notices of the Royal Astronomical Society Kazuaki Ota (Kyoto U) Johan Richard (Obs.Lyon),
More information30 Doradus: Birthplace of giants and dwarfs
Hubble Science Briefing 30 Doradus: Birthplace of giants and dwarfs Elena Sabbi June 7, 2012 Outline 1. How stars form and evolve; 2. How we can use star clusters to better understand high redshift galaxies;
More information1. The symbols below represent the Milky Way galaxy, the solar system, the Sun, and the universe.
Name Date 1. The symbols below represent the Milky Way galaxy, the solar system, the Sun, and the universe. 4. The diagram below illustrates three stages of a current theory of the formation of the universe.
More informationThe Cosmological Redshift. Cepheid Variables. Hubble s Diagram
SOME NEGATIVE EFFECTS OF THE EXPANSION OF THE UNIVERSE. Lecture 22 Hubble s Law and the Large Scale Structure of the Universe PRS: According to modern ideas and observations, what can be said about the
More informationCosmic Microwave Background Radiation
Base your answers to questions 1 and 2 on the passage below and on your knowledge of Earth Science. Cosmic Microwave Background Radiation In the 1920s, Edwin Hubble's discovery of a pattern in the red
More informationHow do telescopes "see" on Earth and in space?
How do telescopes "see" on Earth and in space? By NASA, adapted by Newsela staff on 03.28.17 Word Count 933 Level 970L TOP IMAGE: The Hubble Space Telescope orbiting in space over Earth. SECOND IMAGE:
More informationLecture 37 Cosmology [not on exam] January 16b, 2014
1 Lecture 37 Cosmology [not on exam] January 16b, 2014 2 Structure of the Universe Does clustering of galaxies go on forever? Looked at very narrow regions of space to far distances. On large scales the
More informationTELESCOPES POWERFUL. Beyond the Book. FOCUS Book
FOCUS Book POWERFUL TELESCOPES Why do we need telescopes in order to observe stars that are very far away? Why do stars look bright in the sky while most galaxies, which have billions of stars, are too
More informationActive Galaxies and Galactic Structure Lecture 22 April 18th
Active Galaxies and Galactic Structure Lecture 22 April 18th FINAL Wednesday 5/9/2018 6-8 pm 100 questions, with ~20-30% based on material covered since test 3. Do not miss the final! Extra Credit: Thursday
More informationAstro 301/ Fall 2006 (50405) Introduction to Astronomy
Astro 301/ Fall 2006 (50405) Introduction to Astronomy http://www.as.utexas.edu/~sj/a301-fa06 Instructor: Professor Shardha Jogee TAs: Biqing For, Candace Gray, Irina Marinova Lecture 6: Tu Sep 19 Recent
More informationScience with the New Hubble Instruments. Ken Sembach STScI Hubble Project Scientist
Science with the New Hubble Instruments Ken Sembach STScI Hubble Project Scientist 1 Hubble Has Improved Over Time Servicing missions have improved Hubble s vision. Hubble sees farther and with greater
More informationOutline: Part II. The end of the dark ages. Structure formation. Merging cold dark matter halos. First stars z t Univ Myr.
Outline: Part I Outline: Part II The end of the dark ages Dark ages First stars z 20 30 t Univ 100 200 Myr First galaxies z 10 15 t Univ 300 500 Myr Current observational limit: HST and 8 10 m telescopes
More informationANSWER KEY. Stars, Galaxies, and the Universe. Telescopes Guided Reading and Study. Characteristics of Stars Guided Reading and Study
Stars, Galaxies, a the Universe Stars, Galaxies, and the Universe Telescopes Use Target Reading Skills Check student definitions for accuracy. 1. Electromagneticradiationisenergythatcan travel through
More informationChapter 19 Galaxies. Hubble Ultra Deep Field: Each dot is a galaxy of stars. More distant, further into the past. halo
Chapter 19 Galaxies Hubble Ultra Deep Field: Each dot is a galaxy of stars. More distant, further into the past halo disk bulge Barred Spiral Galaxy: Has a bar of stars across the bulge Spiral Galaxy 1
More informationThe Earliest Galaxies: Exploring Cosmic Sunrise with Hubble, Spitzer, and JWST
John N. Bahcall Lecture National Air and Space Museum March 14 2018 The Earliest Galaxies: Exploring Cosmic Sunrise with Hubble, Spitzer, and JWST Garth Illingworth University of California Santa Cruz
More information8/30/2010. Classifying Stars. Classifying Stars. Classifying Stars
Classifying Stars In the early 1900s, Ejnar Hertzsprung and Henry Russell made some important observations. They noticed that, in general, stars with higher temperatures also have brighter absolute magnitudes.
More information9. Evolution with redshift - z > 1.5. Selection in the rest-frame UV
11-5-10see http://www.strw.leidenuniv.nl/ franx/college/galaxies10 10-c09-1 11-5-10see http://www.strw.leidenuniv.nl/ franx/college/galaxies10 10-c09-2 9. Evolution with redshift - z > 1.5 Selection in
More informationHow Did the Universe Begin?
How Did the Universe Begin? As we will discuss in this lecture, it looks like the Universe started about 14 billion years ago and has been expanding (space stretching) ever since. The model of what happened
More informationBROCK UNIVERSITY. Test 2, March 2015 Number of pages: 9 Course: ASTR 1P02 Number of Students: 420 Date of Examination: March 5, 2015
BROCK UNIVERSITY Page 1 of 9 Test 2, March 2015 Number of pages: 9 Course: ASTR 1P02 Number of Students: 420 Date of Examination: March 5, 2015 Number of hours: 50 min Time of Examination: 18:00 18:50
More informationHubblecast Episode 91: What does the future hold for Hubble? Part I. Visual notes
Hubblecast Episode 91: What does the future hold for Hubble? Part I Visual notes 00:00 Hubble has given us 26 years of remarkable observations. But what comes next? Over the last two years we have asked
More informationThe First Billion Year of History - Galaxies in the Early Universe. Stephen Wilkins, Silvio Lorenzoni, Joseph Caruana, Holly Elbert, Matt Jarvis
The First Billion Year of History - Galaxies in the Early Universe Stephen Wilkins, Silvio Lorenzoni, Joseph Caruana, Holly Elbert, Matt Jarvis X recent z=8.3 GRB CCDs HST Keck Subaru Picture credit:
More informationAstronomy Universe: all of space and everything in it
Astronomy Universe: all of space and everything in it Most (90%) of the universe is made up of: dark matter: stuff we think is there due to amount of mass we think is there but is not detected by the instruments
More informationThe phenomenon of gravitational lenses
The phenomenon of gravitational lenses The phenomenon of gravitational lenses If we look carefully at the image taken with the Hubble Space Telescope, of the Galaxy Cluster Abell 2218 in the constellation
More informationGalaxies. Beyond the Book. FOCUS Book. Make a model that helps demonstrate how the universe is expanding. Follow these steps:
FOCUS Book Galaxies Make a model that helps demonstrate how the universe is expanding. Follow these steps: 1 Use markers to make dots on the outside of an uninflated balloon to represent galaxies full
More informationUNIT 3 The Study of the. Universe. Chapter 7: The Night Sky. Chapter 8: Exploring Our Stellar Neighbourhood. Chapter 9:The Mysterious.
UNIT 3 The Study of the Universe Chapter 7: The Night Sky Chapter 8: Exploring Our Stellar Neighbourhood Chapter 9:The Mysterious Universe CHAPTER 9 The Mysterious Universe In this chapter, you will: identify
More informationAge-redshift relation. The time since the big bang depends on the cosmological parameters.
Age-redshift relation The time since the big bang depends on the cosmological parameters. Lyman Break Galaxies High redshift galaxies are red or absent in blue filters because of attenuation from the neutral
More informationPart two of a year-long introduction to astrophysics:
ASTR 3830 Astrophysics 2 - Galactic and Extragalactic Phil Armitage office: JILA tower A909 email: pja@jilau1.colorado.edu Spitzer Space telescope image of M81 Part two of a year-long introduction to astrophysics:
More informationASTR 1120 General Astronomy: Stars & Galaxies
ASTR 1120 General Astronomy: Stars & Galaxies!NNOUNCEMENTS HOMEWORK #6 DUE TODAY, by 5pm HOMEWORK #7 DUE Nov. 10, by 5pm Dark matter halo for galaxies Dark matter extends beyond visible part of the galaxy
More informationThe Universe. What is it? What is in it? How did it form? How will it end? How do we know?
The Universe What is it? What is in it? How did it form? How will it end? How do we know? What is your place in the Universe? What is the universe? a. The study of the universe its nature, origins, and
More informationWhat is the difference between a galaxy and a solar system?
What is the difference between a galaxy and a solar system? By NASA, adapted by Newsela staff on 09.19.17 Word Count 819 Level 970L An image of the Milky Way galaxy taken In celebration of the International
More informationASTR 1120 General Astronomy: Stars & Galaxies
ASTR 1120 General Astronomy: Stars & Galaxies!NNOUNCEMENTS HOMEWORK #6 DUE TODAY, by 5pm HOMEWORK #7 DUE Nov. 10, by 5pm Dark matter halo for galaxies REVIEW Dark matter extends beyond visible part of
More informationGalaxies and the Universe
Standard 7.3.1: Recognize and describe that the Sun is a medium-sized star located near the edge of a diskshaped galaxy of stars and that the universe contains many billions of galaxies and each galaxy
More informationA New Population of Active Galactic Nuclei
National Aeronautics and Space Administration A New Population of Active Galactic Nuclei Amy J. Barger Taken from: Hubble 2006 Science Year in Review The full contents of this book include more Hubble
More informationThe Milky Way Galaxy is Heading for a Major Cosmic Collision
The Milky Way Galaxy is Heading for a Major Cosmic Collision Roeland van der Marel (STScI) [based on work with a team of collaborators reported in the Astrophysical Journal July 2012] Hubble Science Briefing
More informationFigure 19.19: HST photo called Hubble Deep Field.
19.3 Galaxies and the Universe Early civilizations thought that Earth was the center of the universe. In the sixteenth century, we became aware that Earth is a small planet orbiting a medium-sized star.
More information3. c 4. a 5. f 6. b 7. e. 1. Stars are bright and hot. 2. Distances between stars are measured in light-years. 3. The sun is a yellow star.
Stars, Galaxies, Use Target Reading Skills Check student definitions for accuracy. 1. Electromagnetic radiation is energy that can travel through space in the form of waves. 2. visible light 3. wavelength
More informationEnergy Source for Active Galactic Nuclei
Quasars Quasars are small, extremely luminous, extremely distant galactic nuclei Bright radio sources Name comes from Quasi-Stellar Radio Source, as they appeared to be stars! Can have clouds of gas near
More informationLight. Transverse electromagnetic wave, or electromagnetic radiation. Includes radio waves, microwaves, infra-red, visible, UV, X-rays, and gamma rays
Light Transverse electromagnetic wave, or electromagnetic radiation Includes radio waves, microwaves, infra-red, visible, UV, X-rays, and gamma rays The type of light is determined purely by wavelength.
More informationTour of Galaxies. stuff: dust SEMI-WARM. ASTR 1040 Accel Astro: Stars & Galaxies. Dust+dark molecular clouds. in close-up VLT.
ASTR 1040 Accel Astro: Stars & Galaxies Prof. Juri Toomre TA: Nicholas Nelson, Zeeshan Parkar Lecture 23 Tues 6 Apr 2010 zeus.colorado.edu/astr1040-toomre toomre Tour of Galaxies Role of dust in absorbing/scattering
More informationFormation of the Universe & What is in Space? The Big Bang Theory and components of the Universe
Formation of the Universe & What is in Space? The Big Bang Theory and components of the Universe The Big Bang Theory The Big Bang Theory The Big Bang Theory is the most widely accepted scientific explanation
More informationLecture PowerPoints. Chapter 33 Physics: Principles with Applications, 7 th edition Giancoli
Lecture PowerPoints Chapter 33 Physics: Principles with Applications, 7 th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching
More information2.1 Hubble Space Telescope
2.1 Hubble Space Telescope More than a decade after launch, The Hubble Space Telescope (HST) continues to produce excellent scientific results and stunning imagery. In the past year, the active instruments
More informationHomework 6 Name: Due Date: June 9, 2008
Homework 6 Name: Due Date: June 9, 2008 1. Where in the universe does the general expansion occur? A) everywhere in the universe, including our local space upon Earth, the solar system, our galaxy and
More informationToday. Lookback time. ASTR 1020: Stars & Galaxies. Astronomy Picture of the day. April 2, 2008
ASTR 1020: Stars & Galaxies April 2, 2008 Astronomy Picture of the day Reading: Chapter 21, sections 21.3. MasteringAstronomy Homework on Galaxies and Hubble s Law is due April 7 th. Weak Lensing Distorts
More informationLecture Outlines. Chapter 25. Astronomy Today 7th Edition Chaisson/McMillan Pearson Education, Inc.
Lecture Outlines Chapter 25 Astronomy Today 7th Edition Chaisson/McMillan Chapter 25 Galaxies and Dark Matter Units of Chapter 25 25.1 Dark Matter in the Universe 25.2 Galaxy Collisions 25.3 Galaxy Formation
More informationCosmology Lecture #1 Paul Woodward
Cosmology Lecture #1 Paul Woodward Getting a Feel for the Scale of the Cosmos: Work our way out from the Sun. 1. Use parallax to measure distances to the nearest stars. a) Parallax of nearest star is only
More informationReview of Lecture 15 3/17/10. Lecture 15: Dark Matter and the Cosmic Web (plus Gamma Ray Bursts) Prof. Tom Megeath
Lecture 15: Dark Matter and the Cosmic Web (plus Gamma Ray Bursts) Prof. Tom Megeath A2020 Disk Component: stars of all ages, many gas clouds Review of Lecture 15 Spheroidal Component: bulge & halo, old
More informationPrentice Hall EARTH SCIENCE
Prentice Hall EARTH SCIENCE Tarbuck Lutgens Chapter 24 Studying the Sun 24.1 The Study of Light Electromagnetic Radiation Electromagnetic radiation includes gamma rays, X-rays, ultraviolet light, visible
More informationThe Universe. 3. Base your answer to the following question on The diagram below represents the bright-line spectrum for an element.
A) B) The Universe 1. According to the Big Bang theory, which graph hest represents the relationship between time and the size of the universe from the beginning of the universe to the present? C) D) 2.
More informationAstronomy 102: Stars and Galaxies Sample Review Test for Examination 3
October 28, 2003 Name: Astronomy 102: Stars and Galaxies Sample Review Test for Examination 3 Do not open the test until instructed to begin. Instructions: Write your answers in the space provided. No
More informationIf there is an edge to the universe, we should be able to see our way out of the woods. Olber s Paradox. This is called Olber s Paradox
Suppose the Universe were not expanding, but was in some kind of steady state. How should galaxy recession velocities correlate with distance? They should a) be directly proportional to distance. b) reverse
More informationTelescopes have Three Powers
Telescopes have Three Powers 1. Light Gathering Power: The ability to collect light 2. Resolving Power: The ability to see fine details 3. Magnifying Power: The ability to make objects look bigger Pizzas!!!
More informationHubble Space Telescope Frontier Fields MidTerm Review
Hubble Space Telescope Frontier Fields MidTerm Review *Membership: James Bullock (UC-Irvine) [Chair], Mark Dickinson (NOAO), Richard Ellis (Caltech), Mariska Kriek (UC-Berkeley), Sally Oey (U. Michigan),
More informationStars and Galaxies 1
Stars and Galaxies 1 Characteristics of Stars 2 Star - body of gases that gives off great amounts of radiant energy as light and heat 3 Most stars look white but are actually different colors Antares -
More informationEarth Science, 13e Tarbuck & Lutgens
Earth Science, 13e Tarbuck & Lutgens Beyond Our Solar System Earth Science, 13e Chapter 24 Stanley C. Hatfield Southwestern Illinois College Properties of stars Distance Distances to the stars are very
More informationCHAPTER 4 STARS, GALAXIES & THE UNIVERSE
CHAPTER 4 STARS, GALAXIES & THE UNIVERSE LESSON 1: TELESCOPES ALL TYPES OF ELECTROMAGNETIC RADIATION TRAVEL AT THE SPEED OF LIGHT 186,000 miles per second!! Electromagnetic Radiation = energy that travels
More informationTour of Galaxies. Sgr A* VLT in IR + adaptive optics. orbits. ASTR 1040 Accel Astro: Stars & Galaxies VLT IR+AO
ASTR 1040 Accel Astro: Stars & Galaxies Prof. Juri Toomre TA: Kyle Augustson Lecture 23 Tues 8 Apr 08 zeus.colorado.edu/astr1040-toomre toomre Tour of Galaxies Briefly revisit Monster in the Milky Way
More informationWhat are the most important properties of a telescope? Chapter 6 Telescopes: Portals of Discovery. What are the two basic designs of telescopes?
Chapter 6 Telescopes: Portals of Discovery What are the most important properties of a telescope? 1. Light-collecting area: Telescopes with a larger collecting area can gather a greater amount of light
More information4/6/17. SEMI-WARM stuff: dust. Tour of Galaxies. Our Schedule
ASTR 1040: Stars & Galaxies Super-bubble blowout in NGC 3709 Prof. Juri Toomre TAs: Piyush Agrawal, Connor Bice Lecture 22 Thur 6 Apr 2017 zeus.colorado.edu/astr1040-toomre Tour of Galaxies Look at complex
More informationChapter 25: Beyond our Solar System The Universe pp
Chapter 25: Beyond our Solar System 25.3 The Universe pp 715-721 The Milky Way Galaxy On a clear and moonless night, away from city lights, you might see a a band of light in the sky. This band is The
More informationGalaxies. Galaxy Diversity. Galaxies, AGN and Quasars. Physics 113 Goderya
Galaxies, AGN and Quasars Physics 113 Goderya Chapter(s): 16 and 17 Learning Outcomes: Galaxies Star systems like our Milky Way Contain a few thousand to tens of billions of stars. Large variety of shapes
More informationQuestion 1. Question 2. Correct. Chapter 16 Homework. Part A
Chapter 16 Homework Due: 11:59pm on Thursday, November 17, 2016 To understand how points are awarded, read the Grading Policy for this assignment. Question 1 Following are a number of distinguishing characteristics
More informationBROCK UNIVERSITY. Test 2, March 2018 Number of pages: 9 Course: ASTR 1P02, Section 1 Number of Students: 465 Date of Examination: March 12, 2018
BROCK UNIVERSITY Page 1 of 9 Test 2, March 2018 Number of pages: 9 Course: ASTR 1P02, Section 1 Number of Students: 465 Date of Examination: March 12, 2018 Number of hours: 50 min Time of Examination:
More informationCollecting Light. In a dark-adapted eye, the iris is fully open and the pupil has a diameter of about 7 mm. pupil
Telescopes Collecting Light The simplest means of observing the Universe is the eye. The human eye is sensitive to light with a wavelength of about 400 and 700 nanometers. In a dark-adapted eye, the iris
More informationScience Olympiad Astronomy C Division Event University of Chicago Invitational
Science Olympiad Astronomy C Division Event University of Chicago Invitational The University of Chicago Chicago, IL January 12, 2019 Team Number: Team Name: Instructions: 1) Please turn in all materials
More informationName Date Period. 10. convection zone 11. radiation zone 12. core
240 points CHAPTER 29 STARS SECTION 29.1 The Sun (40 points this page) In your textbook, read about the properties of the Sun and the Sun s atmosphere. Use each of the terms below just once to complete
More informationMeasuring Light waves
Measuring Light waves We normally measure wavelengths (λ) using nanometers (nm) 1 nm = 10-9 m 400-700 nm Increasing wavelengths (λ)! Visible light has wavelengths between 400-700 nm! To detect other types
More informationChapter 15 The Milky Way Galaxy. The Milky Way
Chapter 15 The Milky Way Galaxy The Milky Way Almost everything we see in the night sky belongs to the Milky Way We see most of the Milky Way as a faint band of light across the sky From the outside, our
More informationExam 3 Astronomy 100, Section 3. Some Equations You Might Need
Exam 3 Astronomy 100, Section 3 Some Equations You Might Need modified Kepler s law: M = [a(au)]3 [p(yr)] (a is radius of the orbit, p is the rotation period. You 2 should also remember that the period
More information29:50 Stars, Galaxies, and the Universe Final Exam December 13, 2010 Form A
29:50 Stars, Galaxies, and the Universe Final Exam December 13, 2010 Form A There are 40 questions. Read each question and all of the choices before choosing. Budget your time. No whining. Walk with Ursus!
More informationASTRONOMY II Spring 1995 FINAL EXAM. Monday May 8th 2:00pm
ASTRONOMY II - 79202 Spring 1995 FINAL EXAM Monday May 8th 2:00pm Name: You have three hours to complete this exam. I suggest you read through the entire exam before you spend too much time on any one
More informationAstronomical Observations: Distance & Light 7/2/09. Astronomy 101
Astronomical Observations: Distance & Light 7/2/09 Astronomy 101 Astronomy Picture of the Day Astronomy 101 Something Cool: Lasers on the Moon Astronomy 101 Outline for Today Astronomy Picture of the Day
More informationNOTES: Arvind Borde The Bending of Light and Telescopes. Light travels in straight lines... except when it bends (refraction).
Arvind Borde The Bending of Light and Telescopes Light travels in straight lines...... except when it bends (refraction). 1 The bending of light causes lensing. 2 And lensing is what our eyes, cameras,
More informationchapter 31 Stars and Galaxies
chapter 31 Stars and Galaxies Day 1:Technology and the Big Bang Studying the Stars A. Telescopes - Electromagnetic radiation emitted by stars and other objects include light, radio, and X-ray Space telescopes
More informationThe Universe and Galaxies. Adapted from:
The Universe and Galaxies Adapted from: http://www.west-jefferson.k12.oh.us/earthandspacescience.aspx Astronomy The study of objects and matter outside the Earth s atmosphere and of their physical and
More informationStar systems like our Milky Way. Galaxies
Galaxies Star systems like our Milky Way Galaxies Contain a few thousand to tens of billions of stars,as well as varying amounts of gas and dust Large variety of shapes and sizes Gas and Dust in
More informationChapter 30. Galaxies and the Universe. Chapter 30:
Chapter 30 Galaxies and the Universe Chapter 30: Galaxies and the Universe Chapter 30.1: Stars with varying light output allowed astronomers to map the Milky Way, which has a halo, spiral arm, and a massive
More informationo Terms to know o Big Bang Theory o Doppler Effect o Redshift o Universe
Standard 1: Students will understand the scientific evidence that supports theories that explain how the universe and the solar system developed. They will compare Earth to other objects in the solar system.
More informationCosmology & Culture. Lecture 4 Wednesday April 22, 2009 The Composition of the Universe, & The Cosmic Spheres of Time.
Cosmology & Culture Lecture 4 Wednesday April 22, 2009 The Composition of the Universe, & The Cosmic Spheres of Time UCSC Physics 80C Why do scientists take seriously the Double Dark cosmology, which says
More informationModern Astronomy Review #1
Modern Astronomy Review #1 1. The red-shift of light from distant galaxies provides evidence that the universe is (1) shrinking, only (3) shrinking and expanding in a cyclic pattern (2) expanding, only
More informationBig Galaxies Are Rare! Cepheid Distance Measurement. Clusters of Galaxies. The Nature of Galaxies
Big Galaxies Are Rare! Potato Chip Rule: More small things than large things Big, bright spirals are easy to see, but least common Dwarf ellipticals & irregulars are most common Faint, hard to see Mostly
More informationExamining Dark Energy With Dark Matter Lenses: The Large Synoptic Survey Telescope. Andrew R. Zentner University of Pittsburgh
Examining Dark Energy With Dark Matter Lenses: The Large Synoptic Survey Telescope Andrew R. Zentner University of Pittsburgh 1 Overview The contents of the Universe The accelerating Universe and Dark
More informationAS1001: Galaxies and Cosmology
AS1001: Galaxies and Cosmology Keith Horne kdh1@st-and.ac.uk http://www-star.st-and.ac.uk/~kdh1/eg/eg.html Text: Kutner Astronomy:A Physical Perspective Chapters 17-21 Cosmology Today Blah Title Current
More informationCOSMOLOGY PHYS 30392 OBSERVING THE UNIVERSE Part I Giampaolo Pisano - Jodrell Bank Centre for Astrophysics The University of Manchester - January 2013 http://www.jb.man.ac.uk/~gp/ giampaolo.pisano@manchester.ac.uk
More informationDark Energy: Measuring the Invisible with X-Ray Telescopes
Black holes, Galactic Dark Center Matter and Galactic Center Dark Energy: Measuring the Invisible with X-Ray Telescopes Christine Jones Before 1930 -- only optical observations of the sky Intro Before
More informationThis Week in Astronomy
Homework #8 Due Wednesday, April 18, 11:59PM Covers Chapters 15 and 16 Estimated time to complete: 40 minutes Read chapters, review notes before starting This Week in Astronomy Credit: NASA/JPL-Caltech
More informationChapter 26: Cosmology
Chapter 26: Cosmology Cosmology means the study of the structure and evolution of the entire universe as a whole. First of all, we need to know whether the universe has changed with time, or if it has
More informationCoursework Booklet 2
Level 3 Applied Science UNIT 16: Astronomy and Space Science PHYSICS SECTION Coursework Booklet 2 1 P a g e Astronomy and space science Learning aim B Undertake measurement and observation of astronomical
More informationAstronomy 102: Stars and Galaxies Examination 3 Review Problems
Astronomy 102: Stars and Galaxies Examination 3 Review Problems Multiple Choice Questions: The first eight questions are multiple choice. Except where explicitly noted, only one answer is correct for each
More information