What characteristic indicates how hot a star is?

What color fades the least in the sun besides black? What is the lyre chords of starship? Which color of aurora gives off higher-energy light green or red? What year was the spaceship invented? What part of the atmosphere do airplanes fly? What is going to happen to the sun in 1 billion years from now? What does it mean when a guy eyes pop out when they look at you? How is your Sun similar to other stars? How fast do comets travel through space? Why does glasses fog up when you enter a warm house? What did the hubble telescope find? What are the effects of the discovery of gravity? What do you call a moon that gets smaller after the full moon? What is Alan Shepard nickname? What speed does the rotate at? When the moon orbits the earth then the moon is a different shapes what are they called like half moon or full moon? How many days does sunlight take to travel the 50000 AU from the Sun to the outer reaches of the Oort cloud? What is one of the main disadvantages solar power? What does it mean to dream of a dancing moon? Did Sir Edmund Hillary scale the height 29028 feet?