Dictionary
variable star
noun
Any star whose brightness varies
synonyms
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See also variable star; binary star.
Long-period variable star, any intrinsically variable star whose light fluctuations are fairly regular and require many months or several years to complete one cycle.
Variable star, any star whose observed light varies notably in intensity.
You can see the gorgon's head in the constellation of Perseus as the variable star Algol.
Some binaries form a class of variable stars (see eclipsing variable star).
For 100 years astronomers have paid particular attention to a class of variable star known as the Cepheids.
The most famous star in Cetus is Mira Ceti, or Omicron Ceti, the first known variable star.
The strongest galactic source, Scorpius X-1, appears to be associated with a hot variable star resembling an old nova.
The variable star Algol, or Beta Persei, was the first eclipsing binary to be recognized as such.
The latter has a radius some 300 times that of the Sun, whereas the variable star Betelgeuse oscillates between roughly 300 and 600 solar radii.
Eclipsing variable star, pair of stars revolving about their common centre of mass in an orbit whose plane passes through or very near the Earth.
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