Gravity and the Universe

Front

The Solar system formed about ___________ billion years ago?

Back

4.6

Front

A/An _____________ is a galaxy that has a central part with 'arms' coming out from the center.

Back

spiral

Front

The closer the planet is to the sun the more _________ its orbit is.

Back

circular

Front

A/An _______ is a cloud of dust and gas in the universe.

Back

nebula

Front

_____________ caused dust and gas particles to join together and form celestial bodies?

Back

Gravity

Front

What is gravity?

Back

A force that attracts two bodies towards each other.

Front

What is a galaxy?

Back

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

Front

What is a nebula?

Back

A giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is the Milky Way?

Back

The galaxy that contains our solar system.

Front

What is an elliptical galaxy?

Back

A type of galaxy that is oval in shape and has a smooth, featureless brightness.