Crash Course Astronomy Season 1 Episode 21 Comets 2015
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Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets up close and found them to be lumpy, with vents in the surface that release the gas as ice sublimates. Eons ago, comets (and asteroids) may have brought a lot of water to Earth -- as well as the ingredients for life.
- Released: 2015-06-18
- Runtime: 12 minutes
- Genre: Documentary
- Stars: Phil Plait
- Director: Phil Plait
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1. Introduction to Astronomy 2015-01-15
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2. Naked Eye Observations 2015-01-22
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3. Cycles in the Sky 2015-01-29
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4. Moon Phases 2015-02-05
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5. Eclipses 2015-02-13
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6. Telescopes 2015-02-19
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7. The Gravity of the Situation 2015-02-26
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9. Introduction to the Solar System 2015-03-12
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10. The Sun 2015-03-19
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11. The Earth 2015-04-02
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12. The Moon 2015-04-09
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13. Mercury 2015-04-16
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16. Jupiter 2015-05-08
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17. Jupiter's Moons 2015-05-14
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18. Saturn 2015-05-21
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19. Uranus & Neptune 2015-05-28
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20. Asteroids 2015-06-04
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21. Comets 2015-06-18
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22. The Oort Cloud 2015-06-25
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23. Meteors 2015-07-02
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25. Distances 2015-07-16
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27. Exoplanets 2015-07-30
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28. Brown Dwarfs 2015-08-13
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29. Low Mass Stars 2015-08-20
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30. White Dwarfs & Planetary Nebulae 2015-08-27
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31. High Mass Stars 2015-09-10
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32. Neutron Stars 2015-09-17
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33. Black Holes 2015-09-25
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34. Binary and Multiple Stars 2015-10-01
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35. Star Clusters 2015-10-08
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36. Nebulae 2015-10-15
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37. The Milky Way 2015-10-22
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38. Galaxies, Part 1 2015-10-29
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39. Galaxies, Part 2 2015-11-05
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40. Gamma-Ray Bursts 2015-11-12
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41. Dark Matter 2015-11-19
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42. The Big Bang, Cosmology Part 1 2015-11-26
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43. Dark Energy, Cosmology Part 2 2015-12-03
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44. A Brief History of the Universe 2015-12-10
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45. Deep Time 2015-12-17
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46. Everything, The Universe...And Life 2015-12-24
