Khan Academy - Cosmology and Astronomy

1. -correction--radius-of-observable-universe.flv1.85MB
2. a-universe-smaller-than-the-observable.mp443.79MB
3. becoming-a-red-giant.mp422.33MB
4. beginnings-of-life.mp450.29MB
5. big-bang-introduction.mp419.36MB
6. biodiversity-flourishes-in-phanerozoic-eon.mp452.41MB
7. birth-of-stars.mp413.12MB
8. black-holes.mp428.22MB
9. cepheid-variables-1.mp434.88MB
10. correction--radius-of-observable-universe.mp42.52MB
11. cosmic-background-radiation-2.mp424.87MB
12. cosmic-background-radiation.mp419.54MB
13. cosmological-time-scale-1.mp440.93MB
14. cosmological-time-scale-2.mp435.66MB
15. earth-formation.mp440.33MB
16. four-fundamental-forces.mp416.59MB
17. galactic-collisions.mp412.16MB
18. hubble-image-of-galaxies.mp420.8MB
19. hubble-s-law.mp419.58MB
20. intergalactic-scale.mp457.23MB
21. lifecycle-of-massive-stars.mp426.07MB
22. ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon.mp449.77MB
23. parallax-in-observing-stars.mp48.47MB
24. parsec-definition.mp416.43MB
25. quasar-correction.mp48.42MB
26. quasars.mp440.49MB
27. radius-of-observable-universe.mp432.63MB
28. red-shift.mp417.96MB
29. scale-of-distance-to-closest-stars.mp443.75MB
30. scale-of-earth-and--sun.mp440.96MB
31. scale-of-solar-system.mp447.89MB
32. scale-of-the-galaxy.mp464.9MB
33. star-field-and-nebula-images.mp440.86MB
34. stellar-distance-using-parallax.mp426.29MB
35. stellar-parallax-clarification.mp47.14MB
36. supermassive-black-holes.mp415.27MB
37. supernova--supernovae.mp450.18MB
38. supernova-clarification.mp48.78MB
39. white-and-black-dwarfs.mp422.94MB
40. why-cepheids-pulsate.mp49.72MB
41. why-gravity-gets-so-strong-near-dense-objects.mp410.99MB