Science Solar System Practice Questions

What makes up a galaxy?

A collection of stars, gases, dust, planets, and other astronomical bodies.

How many stars are there?

Hundreds of billions.

What type of galaxy shape does the Milky Way galaxy have?

Spiral shape

How are galaxies classified?

By their shape.

What is the Milky Way constantly rotating around?

A black hole.

Many galaxies contain what?

A black hole.

What is the Universe and what is Earth's place in it?

The universe is everything that exists and Earth obits the Sun, as part of our Solar System.

How does our universe change?

It is expanding at a rate called the Hubble Constant. It is also changing because stars are born and die in galaxies.

What did Edwin Hubble discover about galaxies?

Galaxies that are further away from the Milky Way are moving away from us faster than galaxies that are closer to us.

Do galaxies expand?

Galaxies do not expand. The space between them does.

How big of a star is the Sun?

The Sun is a medium size star.

What do galaxies with a lot of gas tend to have?

More star formation.

What are Solar Systems inside of?

Galaxies

How are stars distributed in space?

They exist in groups/clusters held together by gravity. They are scattered unevenly.

Where is our Solar System located?

It is a part of a galaxy called the Milky Way. More than halfway out from the center in one of the arms.

How fast is the solar system traveling?

828,000 kilometers per hour

Gravity and motion causes what?

Constant changes

How do we know that gravity and motion causes constant changes?

The Red Shift of the galaxies.

Put these in smallest to largest: Earth, Milky Way Galaxy, the Universe, Solar System, and Local Group

Earth, Solar System, Milky Way Galaxy, Local Group, and the Universe

Why does star color change?

Ages of the stars

What is the speed of light in a vacuum?

186,282 miles per second