Stars that look brighter to us on Earth Stars that look dimmer to us on Earth -10 -5 0 5 10 15 Apparent Magnitude How bright a star appears to us depends on how far away it is – so brighter stars aren’t necessarily more luminous! Stars that are more luminous Stars that are less luminous -10 -5 0 5 10 15 Absolute Magnitude

Sun’s magnitude at various distances: Abs. Mag.: +4.5 Distance: .0000048 pc App. Mag.: -26.5 Abs. Mag.: +4.5 Distance: 10 pc App. Mag.: +4.5 Abs. Mag.: +4.5 Distance: 30 pc App. Mag.: +6.9 0 10 20 30 40 Distance from Earth (pc)