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- GIANT
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- Red giant. An enormous star that has been through its main sequence phase. Its diameter is 10 - 1,000 times that of our
- Sun (if supergiants are included as giants). The surface temperature on a giant is usually under 5,000 degrees, causing
- its red colour, and giving rise to its popular name of red giant.
- Our Sun will also become a red giant. It will expand so much that our planet will be swallowed up.
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- The giant phase of a star lasts for a considerably shorter time than its main sequence phase. After the giant phase a star
- turns into a white dwarf, a neutron star or a black hole, according to its size. The absolute magnitude of a giant is
- always below zero.
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- The Sun's giant phase will not be in the near future. It will take about 5 billion years, before the Sun swallows Earth.
- After the giant phase the Sun will turn into a white dwarf. That is because of the Sun's small size.
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