8.4 Formation and Motion of Galaxies

Front

What are the main components of the solar system?

Back

The Sun and planets.

Front

What is dust in the context of space?

Back

Tiny particles of matter floating in space; it condenses under gravity to form stars and planets.

Front

What role does gravity play in a galaxy?

Back

Gravity is responsible for the motion of the objects within a galaxy.

Front

What force is primarily responsible for the formation of the solar system?

Back

Gravity.

Front

What type of motion causes the solar system to align in a disc shape?

Back

Spinning.

Front

Define a galaxy.

Back

A large system of stars, gas, dust, and dark matter bound together by gravity.

Front

What is the Milky Way?

Back

The galaxy that contains our solar system.

Front

What is the role of gravity in star formation?

Back

Gravity pulls dust and gas together to form stars.

Front

What is a nebula?

Back

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

Front

What is the difference between a planet and a star?

Back

A planet orbits a star and does not produce its own light, while a star generates light and heat through nuclear fusion.