Tackling Astronomical Misconceptions. Dave Leake William M. Staerkel Planetarium Parkland College
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1 Tackling Astronomical Misconceptions Dave Leake William M. Staerkel Planetarium Parkland College
2
3 Is the Earth round?
4
5 1.ESS1.1 = Patterns from observation (sun/moon rise/set, stars visible at night, apparent motions) 1.ESS1.2 = Daylight different at different times of year 5.PS2.1 = Gravity pulls things down 5.ESS1.1 = Apparent brightness relating to distance 5.ESS1.2 = Shadows (length & direction), different stars in different seasons MS.ESS1.1 = Earth/Sun/Moon model to explain lunar phases, eclipses, & seasons MS.ESS1.2 = Model role of gravity to explain motions MS.ESS1.3 = Scale in solar system, data from telescopes, compare/contrast solar system objects HS.ESS1.1 = Model lifespan of Sun, role of fusion, flow of energy, stellar lifetimes, spaceweather & flares HS.ESS1.2 = Big Bang theory, background radiation, light spectra, Hubble Law, composition of universe HS.ESS1.3 = stellar lifetimes, nucleosynthesis, stellar masses HS.ESS1.4 = Motion of solar system objects, Newton s Laws, Kepler s Laws
6 MISCONCEPTIONS...THE LIST!
7 Is the North Star the brightest star?
8
9 PHASES OF THE MOON
10 Clicker: Why does the Moon change its appearance? A. The Earth s shadow covers the Moon B. Clouds cover the Moon C. The Moon turns its dark side towards us D. We see different parts of the lighted face
11 Lets have a ball! How much is lit? Try this! The Moon is ALWAYS* HALF LIT!!! *exception: lunar eclipse
12 Clicker: If we see the Moon in the south at 7pm tonight, just below a star, where will the Moon be at 7pm tomorrow night? A. Still below the star (same place) B. To the right (west) of the star C. To the left (east) of the star D. Above the star (north)
13 But the Moon doesn t always look half-lit. What gives? Depends on where your eye is! Try this! Sun A Quiz?
14 Does the Moon spin?
15 Class participation! Your job: Come up and sign the sheet Take a cookie and a post-it note (you lose the points if you eat the cookie!) Using chocolate & vanilla icing, ice your cookie based on the Moon phase you ve been assigned. Wait......
16 Rise/Set times It s a marvelous night for a Moondance
17 THE FOUR SEASONS OR... WHY IS IT COLD IN THE WINTER?
18 Clicker: Why is it cold in the winter time? A. The Earth is farther from the Sun B. The Earth is tilted away from the Sun C. The snow makes it colder D. The sunlight isn t as concentrated E. It has something to do with Dave s in-laws
19 Are we farther from the Sun in the winter?
20 Almost a perfect circle!
21 Average temperatures Location Latitude January July Minneapolis, MN 45 o N Champaign, IL 40 o N Quito, Ecuador 0 o Santiago, Chile 33 o S Source: Weatherbase.com
22 Clicker: What time of the day do we have our longest shadows? A. Noon B. Sunrise/Sunset C. At mid-morning (like 10am) D. Mid-afternoon (like 3pm) E. At midnight (?)
23 Clicker: During which month do we have our longest shadows (at noon)? A. December B. June C. March D. August
24 Prove it! Noon June 21 Noon December 21
25
26 Sun hemispheres
27
28 Daylight! For Champaign: Sunrise Sunset #hours daylight* June 21 5:24am 8:26pm 15 hours Sept. 23 6:42am 6:28pm 12 hours Dec. 21 7:12am 4:31pm 9 hours Mar. 21 6:54am 7:07pm 12 hours * rounded figure Source: US Naval Observatory
29 Terms.... Solstice (Sun still) = extreme! Sun at highest or lowest. - Summer = June 21 - Winter = December 21 Equinox (equal night) = in between times - Spring (vernal) = March 21 - Autumn = September 23
30 Clicker: When the Sun is highest at noon, we have.... A. Longest days B. Shortest days C. Same number of day & night hours D. Vacation (don t pick this one)
31 Look at the Sunrise/Sunset positions
32 OK, so why is this happening? 23.5 o tilt. Try this
33 How does this make it cold in the winter?
34 Spreading out the light...
35 GRAVITY
36 Clicker: Why do astronauts float inside the space station? A. There is no gravity there B. The space station shields them from gravity. C. They re falling D. The motion of the station counteracts gravity E. There s no air where the station is orbiting
37
38 Or try this Or this Orbit
39 Oh and by the way.... Comet ISON Dec. 2013
40 Perseid Meteors! Morning of Aug. 12 or 13
41 Say cheese!
42 Thank you! Dave Leake Parkland College
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Name: Astronomy 103: First Exam Stephen Lepp September 21, 2010 Each question is worth 2 points. Write your name on this exam and on the scantron. Short Answer Mercury What is the closest Planet to the
Solar Noon The point at which the Sun is highest in the sky (and when shadows are shortest).
Solar Noon The point at which the Sun is highest in the sky (and when shadows are shortest). Rotation The movement of one object as it turns or spins around a central point or axis. Revolution The movement
Define umbra and penumbra. Then label the umbra and the penumbra on the diagram below. Umbra: Penumbra: Light source
Lesson 3 Eclipses and Tides LA.8.2.2.3, SC.8.E.5.9, SC.8.N.1.1 Skim or scan the heading, boldfaced words, and pictures in the lesson. Identify or predict three facts you will learn from the lesson. Discuss