Absolute magnitude (AQA A-Level Physics): Flashcards

How bright a star appears from Earth

Star brightness if at 10 parsecs from Earth

10 parsecs

$m - M = 5 \log(\frac{d}{10})$, $d$ in parsecs

Distance where 1 AU subtends 1 arcsecond

3.26 light-years

$3.08 \times 10^{16}$ m

$1.50 \times 10^{11}$ m

$d = \frac{1}{\theta}$

Closer to Earth