Astronomy II

Match it! Select the correct answer from the pull down...Good luck!

The color of the coolest star is

The universe includes all matter and energy

Main sequence is the balance between FUSION and GRAVITY

__________is loose, remaining material on the surface of a planet or moon

_______is the measure of how an object's orbit differs from a perfect circle

The Sun makes up about ____% of the Solar System's mass?

A collection of million and billions of stars around a common center is called a

Our galaxy is part of a group of galaxies called the