The Life Cycle of a Star Unit 2024

Front

What is apparent brightness?

Back

A measurement of how bright a star appears to be from Earth.

Front

What does the HR diagram plot?

Back

Temperature vs. luminosity.

Front

If two stars are identical in brightness and size, but one star is twice as far away, how does their brightness compare?

Back

The closer star will be 4 times as bright.

Front

Which object in our sky has the greatest apparent brightness?

Back

The Sun.

Front

What are clouds of gas and dust where all stars are formed called?

Back

Nebulae.

Front

What is luminosity?

Back

The total amount of energy emitted by a star per second.

Front

What is the main sequence in the HR diagram?

Back

A continuous band of stars that ranges from hot, luminous stars to cool, dim stars.

Front

What is a supernova?

Back

A powerful explosion that occurs at the end of a star's life cycle.

Front

What is a neutron star?

Back

A dense remnant of a supernova, composed mostly of neutrons.

Front

What is a black hole?

Back

A region of space where the gravitational pull is so strong that nothing, not even light, can escape.