примеры использования
This is a blue supergiant star with luminosity 1,300 times that of our own Sun.
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.
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.
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.
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