Galaxies

A galaxy is a system of:

• Planets and moons

• Clouds and rain

• Stars with gas and dust held together by gravitational attraction

• Smoke and water

Galaxies may contain:

• 100 million to ten trillion stars

• 10 million to one trillion stars

• 1 million to one trillion stars

How many galaxies are there believed to be in the universe?

• 200 billion

• 20 million

• 2 trillion

• 100

How many galaxies are there believed to be in the universe?

• 200 billion

• 20 million

• 2 trillion

• 100

In the Milky Way, Astronomers estimate that there are how many STARS?

• 10 million

• 1 million

• 100 billion

• 8 trillion

What do Astronomers believe to be in the center of every galaxy?

• Green star

• Black hole

• Red star

• Blue hole

All STARS are believed to begin as a:

• Nun

• Noun

• Nevus

• Nebula

An immense cloud of hydrogen, helium, hydrogen and astronomical plasma floating in interstellar space is:

• Nebula

• Nun

• Nevus

• Noun

Our solar system is in the:

• Snickers galaxy

• 3 musketeer galaxy

• Milky Way galaxy

• Mars galaxy

The Milky Way is ___________ than the average size galaxy.

• Smaller

• Larger