Compare a red giant to our sun

A red giant is a star that has used up all of its hydrogen and helium fuels, and has rapidly expanded. This is part of the normal star process, and this will happen to our sun in about 5 billion years.

The red giant that the sun will expand to will most likely engulf all of the inner planets, including Mercury, Venus, and Earth.

Its bigger. For example our sun rising is just a little circle in the sky but a red giant rising above the horizon would take up the sky.

A red giant is red and is bigger than our sun.

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