Astronomy Review

A year is the same on every planet

• True

• False

Which Planet is furthest from the sun

• Jupiter

• Earth

• Pluto

• Neptune

Which is bigger?

• A planet

• A star

• A black hole

• A solar system

• Galaxy

How does observing stars help us understand our own galaxy?

Which color star is the hottest?

• White

• Blue

• Red

• Yellow

What is a galaxy?

• A collection of planets orbiting around a star, held together by gravity

• A collection of stars, planets, gas, dust and solar systems held together by gravity

• A cloud of dust floating in space

• An intense gravitational pull that pulls in all matter, including light

Check all the categories of a galaxy

• Spiral

• Cluster

• Rotational

• Irregular

• Elliptical

Why are there no gas planets near the sun? Check all that apply

• The gas would vaporize

• The gasses were absorbed by the sun

• Solar winds push the gasses away past the frost line

• They froze and fell into the inner planets

• Only rocky material can stand the heat closer to the sun

Andromeda is the closest galaxy at 2.5 million light years away. How long would it take to get there if you are traveling at light speed?

• 2.5 million years

• 5 years

• 5 million years

• 2.5 years

• 25,000 years

In the formation of a galaxy, what happens first?

• Gravity pulled more and more material towards a spinning disk

• A cloud of gas and dust collapsed in on itself

• Nuclear fusion began

• Heavier, rocky objects got pushed away