One of the mysteries of the English language finally explained.
A very large star that is even brighter than a giant, often despite being relatively cool.
- ‘In fact, it has become the coolest supergiant star ever found and all because of a single observation made by a dedicated amateur astronomer in Australia.’
- ‘It was suggested that the red supergiant orbited a companion star that had shredded its outer layers just before the explosion.’
- ‘This new heat supply causes the outer layers of the star to expand and cool, and the star becomes a red giant, or a red supergiant if it is very massive.’
- ‘The discovery confirms the accepted theory that type II supernovas are produced when elderly, bloated stars known as red supergiants run out of nuclear fuel and collapse.’
- ‘This is a blue supergiant star with luminosity 1,300 times that of our own Sun.’
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