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10 cards from this deck
How bright a star appears from Earth
Star brightness if at 10 parsecs from Earth
10 parsecs
m−M=5log(d10)m - M = 5 \log(\frac{d}{10})m−M=5log(10d), ddd in parsecs
Distance where 1 AU subtends 1 arcsecond
3.26 light-years
3.08×10163.08 \times 10^{16}3.08×1016 m
1.50×10111.50 \times 10^{11}1.50×1011 m
d=1θd = \frac{1}{\theta}d=θ1
Closer to Earth
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