Stars, Galaxies, and Everything

Our galaxy is called

• The Earth Nebula

• The Hubble Galaxy

• The Milky Way

• The Andromeda

Galaxies are composed of (best answer)

• stars

• stars and gas

• stars, dust, and gas

• stars, dust, and gas held together by gravity

The Milky Way Galaxy is a

• spiral

• lenticular

• elliptical

• irregular

The unit used to measure distances within our solar system

• kilometers

• miles

• light year

• astronomical units

The unit used to measure distances between objects like stars or galaxies is

• kilometers

• miles

• light years

• astronomical units

Light years are a measure of

• time

• speed

• distance

• light

A light year is...

• The speed light travels

• How long it takes light to get to you from the sun

• The distance light can travel in a year

• How many years it takes light to be emitted

Proxima Centauri is the closest star to Earth after the Sun and is located 4.3 light years away from Earth. How long does it take light from Proxima Centauri to reach Earth?

• 1 year

• 4.3 years

• 43 years

• 10 trillion years

To express the distance between the Milky Way galaxy and the Andromeda galaxy, the most appropriate unit of measure is the

• meter

• kilometer

• light year

• astronomical unit

A supernova is the explosion of a dying:

• medium-mass star

• high-mass star

• protostar

• low-mass star