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ASTR 1523 Lecture 10 duration 49 minutes 45 seconds ASTR 1523 Lecture 10 ASTR 1523 Lecture 10	ASTR 1523 Lecture 10 universe expansion energy hubble galaxies law earth temperature matter protons galaxy distance supernova rate stars hydrogen helium ball reason class From Nathan Kaib 0 likes 19 plays 0
ASTR 1523 Lecture 9 duration 50 minutes 28 seconds ASTR 1523 Lecture 9 ASTR 1523 Lecture 9	ASTR 1523 Lecture 9 universe galaxy galaxies light doppler distance shift waves source observer spectrum class stars object wavelength body andromeda hubble velocity wavelengths From Nathan Kaib 0 likes 13 plays 0