Crash Course Astronomy Season 1 Star Clusters 2015
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Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity. They’re young, and evaporate over time, their stars let loose to roam space freely. Globular clusters, on the other hand, are larger, have hundreds of thousands of stars, and are more spherical. They’re very old, a significant fraction of the age of the Universe itself, and that means their stars have less heavy elements in them, are redder, and probably don’t have planets (though we’re not really sure).
- Released: 2015-10-08
- 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
