HR diagram and Cosmos

Front

The process by which a star changes over its lifetime is its ____________.

Back

life cycle

Front

What type of galaxy is this?

Back

Elliptical

Front

Everything that exists, including all matter and energy. Mostly consists of empty space.

Back

the Universe

Front

Ninety percent of all stars are ______ .

Back

main sequence stars

Front

What is the name of our galaxy?

Back

Our galaxy is called the Milky Way galaxy.

Front

What is the main sequence in the HR diagram?

Back

The main sequence is a continuous band of stars that forms a diagonal line on the HR diagram, where stars spend most of their life cycle fusing hydrogen into helium.

Front

What are the two axes of the HR diagram?

Back

The vertical axis represents luminosity (brightness) and the horizontal axis represents temperature (color) of stars.

Front

What is a red giant?

Back

A red giant is a large, luminous star that has exhausted the hydrogen in its core and has expanded and cooled, appearing red.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers.

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, often resulting in the formation of a neutron star or black hole.