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10 cards from this deck
Distance light travels in 1 year: 9.46imes10159.46 imes 10^{15}9.46imes1015 m
Distance, not time
8 minutes and 20 seconds
LLL, total rate of energy output from star's surface (W)
m=L4ฯd2m = \frac{L}{4\pi d^2}m=4ฯd2Lโ
Period directly related to luminosity
v=H0Dv = H_0 Dv=H0โD
sโ1s^{-1}sโ1 (per second)
Approximately 13.7 billion years
Space itself expands, not galaxies moving through space
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