The Expanding Universe (HSC SSCE Physics): Flashcards

Distance light travels in 1 year: $9.46 imes 10^{15}$ m

Distance, not time

8 minutes and 20 seconds

$L$, total rate of energy output from star's surface (W)

$m = \frac{L}{4\pi d^2}$

Period directly related to luminosity

$v = H_0 D$

$s^{-1}$ (per second)

Approximately 13.7 billion years

Space itself expands, not galaxies moving through space