1. Name:____________________________
Star Color Temperature Mass in Luminosity Radius Distance Apparent
in Terms of (Power in compared from the Sun Magnitude
Celsius/Kelvin Solar Mass Suns) to the Sun in light years
Sirius white 8585 2.02 sm 27 suns 2.2 solar 8.6 LY -1.47 am
8858 radii
Aldebaran orange 3133 2.5 sm 1081 suns 95 solar 65.2 LY 0.84 am
3406 radii
Pollux yellow 4521 1.86 sm 49 suns 10 solar 33.7 LY 1.15 am
4794 radii
Capella yellow 5146 2.7 sm 162 suns 14 solar 42 LY 0.06 am
5419 radii
Procyon white 6527 1.5 sm 7.5 suns 2.0 solar 11.4 LY 0.37 am
6800 radii
orange 3215 14 sm 58983 suns 667 solar 429 LY 0.43 am
Betelgeuse 3488 radii
a) Do all stars have approximately the same temperature? Explain.
b) What seems to be the color of stars that have a temperature in the 3000’s degrees?
______Orange___________________________________
c) Are all stars about the same size?
d) Pick any other orange star in the main window and enter its name and temperature in the
table. Was your prediction in b) correct?
e) Do stars always appear brighter when they’re closer to us? Explain.
f) Do bigger stars always appear brighter to us? Explain.