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Glossary term: Red Supergiant Star

Also known as M supergiant

Description: A red supergiant star is a massive star which has run out of hydrogen fuel and expanded as it changes to helium or heavier elements for fuel. Examples of red supergiants are Betelgeuse, in Orion, and Antares, in Scorpius. Like red giants, red supergiants are unstable to pulsation and mass loss. Their lifetimes are only a few tens of thousands of years.

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Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".