8th grade milky way test

Front

How many planets likely exist in our galaxy?

Back

Billions of planets are estimated to exist in the Milky Way galaxy.

Front

True or False: While observing the night sky, many astronomers noticed light sources that looked the very same like stars.

Back

False. Some light sources may be other celestial objects, not stars.

Front

How wide is the Milky Way galaxy in light-years?

Back

The Milky Way galaxy measures about 100,000 light-years across.

Front

Where does Harlow Shapley conclude our solar system lies in relation to the center of the Milky Way?

Back

Harlow Shapley concluded that our solar system lies outside the center of the Milky Way.

Front

Is Andromeda inside or outside the Milky Way?

Back

Andromeda is outside the Milky Way.

Front

What is the Milky Way?

Back

The Milky Way is a barred spiral galaxy that contains our solar system.

Front

What is the shape of the Milky Way galaxy?

Back

The Milky Way galaxy has a barred spiral shape.

Front

What is the approximate number of stars in the Milky Way?

Back

The Milky Way contains approximately 100 to 400 billion stars.

Front

What is the significance of the Andromeda galaxy?

Back

Andromeda is the nearest spiral galaxy to the Milky Way and is on a collision course with it.

Front

What is a galaxy?

Back

A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter.