Unit 2 Solar System Review

The sun is a ________________.

What causes galaxies to collide?

If you study astronomy, you are studying ____.

We live in the Milky Way Galaxy. The shape of this galaxy is __________.

Dwarf planets are not like other planets because they _____________

The universe is made up of everything that _____.

Stars are formed when ____.

Earth has __________________ moon.

Meteors are often called __________.

Galaxies contain dust, gas, stars, and other objects. They are held together by _______.

In our solar system, Earth, the other planets, and other objects revolve around the _________

The inner planets are much _________________ than the outer planets.

Red stars are the hottest stars.

Stars are grouped by _____, brightness, size, and temperature.

Asteroids are made up of ______________________ and _____________________.

Meteoroids are ___________

The inner planets are made up of _________________________.

Edward Hubble was the first person to study galaxies in the 1920's.

Most galaxies are what shape?

The outer planets are made up of _____________.