The Universe

Front

What factors does the H-R diagram classify stars by?

Back

Temperature and luminosity.

Front

What type of stars are the hottest?

Back

Blue stars.

Front

True or False: The distance between objects affects gravitational pull.

Back

True.

Front

What is made of ice, dust, and small rocky particles?

Back

Comet.

Front

Which star is the coldest?

Back

Red Star.

Front

What is the main component of a comet?

Back

Ice, dust, and rocky particles.

Front

What does the term 'luminosity' refer to in astronomy?

Back

The total amount of energy emitted by a star per unit of time.

Front

What is the significance of the H-R diagram in astronomy?

Back

It helps classify stars and understand their evolution.

Front

What is gravitational pull?

Back

The force that attracts two bodies towards each other, dependent on their masses and distance.

Front

What color are the coolest stars?

Back

Red.