Star, and Stellar Evolution

Front

What is the hottest outer layer of the Sun's atmosphere that is seen only during a solar eclipse?

Back

The corona.

Front

What determines whether or not a star collapses into a Black Hole?

Back

The star's mass.

Front

What is the name of our galaxy?

Back

The Milky Way.

Front

What did Edwin Hubble notice about most galaxies that supports the idea that the universe is expanding?

Back

Most galaxies appeared to be moving away from us.

Front

What is the pitch or frequency of red light compared to blue light?

Back

Red light has a low pitch, or frequency.

Front

What is a star?

Back

A star is a massive, luminous sphere of plasma held together by gravity, undergoing nuclear fusion.

Front

What is stellar evolution?

Back

Stellar evolution is the process by which a star changes over the course of time, including its formation, life cycle, and eventual death.

Front

What is a supernova?

Back

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

Front

What is a black hole?

Back

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

Front

What is the main sequence in the context of stellar evolution?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness, where stars spend most of their lives fusing hydrogen into helium.