Unformatted text preview: -Brightness depends upon distance-Luminosity is the same, regardless of distance and what we observe with our eyes-Brightness is proportional to luminosity / distance 2 o B = L / 4πD 2 Magnitude System-Hipparchus: 1 – 6. Lower numbers mean brighter-5 magnitude difference ≡ factor of 100 in brightness apparent magnitude-1 magnitude different = 100 1/5 = 2.5 factor in brightness-Absolute magnitude is as if everything were at 10 pc...
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- Fall '08
- Astronomy, absolute magnitude, magnitude difference factor, AU Stellar Motions, astronomy Stellar distances