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Scale of Earth and Sun Astronomy 9m 31s Click to view videos
Scale of Solar System Astronomy 12m 31s Click to view videos
Scale of Distance to Closest Stars Astronomy 8m 18s Click to view videos
Scale of the Galaxy Astronomy 12m 55s Click to view videos
Intergalactic Scale Astronomy 10m 50s Click to view videos
Hubble Image of Galaxies Astronomy 4m 12s Click to view videos
Big Bang Introduction Astronomy 11m 03s Click to view videos
Radius of Observable Universe Astronomy 16m 39s Click to view videos
Radius of Observable Universe - Correction Astronomy 2m 14s Click to view videos
Red Shift Astronomy 10m 04s Click to view videos
Cosmic Background Radiation 1 Astronomy 11m 36s Click to view videos
Cosmic Background Radiation 2 Astronomy 10m 15s Click to view videos
Cosmological Time Scale 1 Astronomy 7m 07s Click to view videos
Cosmological Time Scale 2 Astronomy 6m 18s Click to view videos
Four Fundamental Forces Astronomy 10m 29s Click to view videos
Birth of Stars Astronomy 7m 58s Click to view videos
Becoming a Red Giant Astronomy 11m 30s Click to view videos
White and Black Dwarfs Astronomy 12m 54s Click to view videos
A Universe Smaller than the Observable Astronomy 8m 58s Click to view videos
Star Field and Nebula Images Astronomy 7m 04s Click to view videos
Parallax in Observing Stars Astronomy 7m 21s Click to view videos
Stellar Distance Using Parallax Astronomy 11m 40s Click to view videos
Stellar Parallax Clarification Astronomy 2m 22s Click to view videos
Parsec Definition Astronomy 7m 33s Click to view videos
Hubbles Law Astronomy 11m 12s Click to view videos
Lifecycle of Massive Stars Astronomy 6m 41s Click to view videos
Supernova (Supernovae) Astronomy 11m 58s Click to view videos
Supernova clarification Astronomy 1m 32s Click to view videos
Black Holes Astronomy 10m 09s Click to view videos
Cepheid Variables 1 Astronomy 9m 23s Click to view videos
Why Cepheids Pulsate Astronomy 7m 10s Click to view videos
Why Gravity Gets So Strong Near Dense Objects Astronomy 8m 13s Click to view videos
Supermassive Black Holes Astronomy 9m 28s Click to view videos
Quasars Astronomy 9m 15s Click to view videos
Quasar - Correction Astronomy 1m 46s Click to view videos
Galactic Collisions Astronomy 3m 34s Click to view videos
Earth Formation Astronomy 10m 08s Click to view videos
Beginnings of Life Astronomy 10m 26s Click to view videos
Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon Astronomy 9m 56s Click to view videos
Biodiversity Flourishes in Phanerozoic Eon Astronomy 10m 28s Click to view videos
First living things on land - clarification Astronomy 5m 35s Click to view videos
Plate Tectonics-Difference between crust and lithosphere Astronomy 7m 59s Click to view videos
Structure of the Earth Astronomy 9m 33s Click to view videos
Plate Tectonics - Evidence of plate movement Astronomy 13m 18s Click to view videos
Geological Features of Divergent Plate Boundaries Astronomy 11m 58s Click to view videos

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