Wonders of Sky. Sitha K Jagan. Research Scholar Department of Physics University of Calicut
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1 Wonders of Sky Sitha K Jagan Research Scholar Department of Physics University of Calicut
2
3 Night Sky???? Moon Stars Planets Galaxies Nebulea Clusters
4 Moon
5 Stars VY Canis Majoris Largest star constellation Canis Major 2600 solar radii size
6 Planets
7 Venus
8 Galaxy
9 Galaxy (Andromeda) Messier 31/M31
10 Nebula
11 Nebula (Horsehead)
12 Clusters
13 Deep Sky
14 Deep Sky
15 Stars (Sun)
16 Invisible Light/Inaudible Sound All light can't be seen!!
17 Invisible Light/Inaudible Sound All light can't be seen! & All Sound can't be hear
18 Audible Sound 20 Hz 20 vibrations per second 2x104 Hz 20,000 vibrations per seco Hz means Hertz
19 Stars (Sun)
20 Invisible Light/Inaudible Sound All light can't be seen!
21 Invisible Light/Inaudible Sound All light can't be seen! & All Sound can't be hear
22 Audible Sound 20 Hz 20 vibrations per second 2x104 Hz 20,000 vibrations per seco
23 Inaudible Sound Infrasonic Ultrasonic Earthquakes Bat 20 Hz 2x104 Hz
24 Visible Light/Audible Sound 20 Hz = 20 vibrations per second 2x104 Hz = 20,000 vibrations per second 4x1014 Hz = 400,000,000,000,000 oscillations per s 8x1014 Hz = 800,000,000,000,000 oscilliations per seco
25 Electromagnetic Spectrum (Light) High Energy Low Energy Radio wave Micro wave Infrared Ultraviolet ray ray 106Hz 1010Hz 1012Hz 1016Hz X-ray Gamma ray 1018Hz 1020Hz Visible Light Low Energy High Energy
26 Electromagnetic Spectrum (Light) What it means?
27 Electromagnetic Spectrum (Light) High Energy Low Energy Radio wave Micro wave Infrared Ultraviolet ray ray 106Hz 1010Hz 1012Hz 1016Hz X-ray Gamma ray 1018Hz 1020Hz We don't see most if we depend only on ou Visible Light Technology helps us to see the unseen Low Energy High Energy
28 Who emits light? Matter!! A hot matter!!
29 Who emits light? Matter!! A hot matter!! ~ 200o C emits infra red
30 Who emits light? Matter!! A hot matter!! ~ 200o C emits infra red ~ 800o C emits red light
31 Who emits light? Matter!! A hot matter!! ~ 200o C emits infra red ~ 800o C emits red light ~ 2,000o C emits blue light
32 Who emits light? Matter!! A hot matter!! Colour/Frequency of emitted light depends on Temperature Composition
33 Star light Let us heat up a Star!! 4,100o C emits 5,500o C emits 6,000o C emits 10,000o C = 105 oc emits ultra violet 10,000,000o C = 107 oc emits X-rays 10,000,000,000o C = 1010 oc emits gamma ra
34 Star light Let us heat up a Star!! 4,100o C emits High frequency 5,500o C emits High energy 6,000o C emits Hotter the star is! 10,000o C = 105 oc emits ultra violet 10,000,000o C = 107 oc emits X-rays 10,000,000,000o C = 1010 oc emits gamma ra
35 Man (Visible light)
36 Man (Infrared)
37 Man (Visible light)
38 Man (X-ray)
39 Man (Visible light)
40 Man (Gamma-ray)
41 Atmosphere Multiwavelength Astronomy
42 Multiwavelength Astronomy Atmosphere Radio Star
43 Multiwavelength Astronomy Gauribidanur Radio Observatory Bangalore Ooty Radio Telescope Ootacamund Atmosphere Gaint Meterwave Radio Telescope Pune Radio Star
44 Multiwavelength Astronomy Atmosphere Infra red Star
45 Multiwavelength Astronomy Himalayan Chandra Telescope Hanle Mt. Abu IR Observatory Mt. Abu Spitzer NASA Atmosphere Infra red Star
46 Multiwavelength Astronomy Atmosphere Visible Star
47 Multiwavelength Astronomy Himalayan Chandra Telescope Hanle Vainu Bappu Observatory Kavalur Atmosphere Visible Star IUCAA Girawali Observatory Pune Devasthal Optical Telescope Nanital
48 Multiwavelength Astronomy Atmosphere X-ray & Ultra violet Star
49 Multiwavelength Astronomy X-ray & Ultra violet Star Chandra NASA XMM-Newton ESA Atmosphere INDIA
50 Multiwavelength Astronomy Atmosphere Gamma ray Star
51 Multiwavelength Astronomy Fermi NASA Atmosphere TACTIC MT. Abu Gamma ray Star HAGAR Hanle
52 Star (Sun like)
53 Star (Sun like) 5,500o C
54 Star (Sun like) 5,500o C 10,000o C Ultra violet
55 Star (Sun like) 5,500o C 10,000o C 1,000,000o C Ultra violet X-rays
56 Star (Sun like) Photosphere 5,500o C Visible Light
57 Star (Sun like) Chromosphere 10,000o C Ultraviolet Light
58 Star (Sun like) Corona 1,000,000o C X-ray
59 Nebula (Crab) Radio Crab!! Credit: National Radio Astronomy Observa NSF, USA
60 Nebula (Crab) Visible Crab!! Credit: Hubble Space Telescope NASA, USA
61 Nebula (Crab) Ultraviolet Crab!! Credit: Ultraviolet Imaging Telescope NASA, USA
62 Nebula (Crab) X-ray Crab!! Credit: Chandra X-ray Telescope NASA, USA
63 Nebula (Crab) Composite Crab!! Blue - X-ray Green - Optical Red - Radio Credit: National Radio Astronomy Observa Hubble Space Telescope Chandra X-ray Telescope NASA, USA
64 Active Galaxy
65 Active Galactic Nuclie(AGN) The nucleus of a galaxy with luminosity >1044 ergs/s The galaxy which host an AGN is known as Active Galaxy AGN Structure AGN Classification
66 Galaxy (3C 273) Radio
67 Galaxy (3C 273) Radio Visible
68 Galaxy (3C 273) Radio Visible X-ray
69 Cosmic Rays Hot matter particle escaping from the heavenly bodies and reaching us Unlike light they do not travel straight but deflected by cosmic magnets
70 Cosmic Rays Pierre Auger Observatory
71 Extreme Universe Maximum energy of the matter particle? Cosmic ray (Pierre Auger Observatory)
72 Conclusion Large Hadron Collider Still Our Universe is Largely Invisible and Unknown!! Maximum energy achieved ~ oc = C o Matter particle ~ 1,000,000,000,000,000,000,000,000 oc From Universe 16 Light ~ 10,000,000,000,000,000 oc = 10 o C!!
73 Conclusion Large Hadron Collider Still Our Universe is Largely Invisible and Unknown!! r a t s 17 e l t Maximum energy achieved ~ C = 10 C t i l e l? k e r n i a w u t o e y l k t n a i h w T Matter oparticle r~w e 1,000,000,000,000,000,000,000,000 d n w I w o H From Universe o o 16 Light ~ 10,000,000,000,000,000 oc = 10 o C!! sithajagan@gmail.com o C
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