A century ago, a star in Andromeda named V1 launched a revolution in astronomy, revealing its true immensity and the origin ...

The new results, from a team led by Grzegorz Pietrzyński (Universidad de Concepción, Chile, Obserwatorium Astronomiczne Uniwersytetu Warszawskiego, Poland), appear in the Nov. 25, 2010 edition of the ...

An image of the Cepheid variable star RS Puppis. The most accurate observation to date of distant stars that periodically change in brightness may spark a rethink of the rate at which the universe ...

Since the 1960s, a class of special pulsating stars has stymied scientists attempting to weigh them. The two main ideas for how to measure these stars' masses have so far produced vastly different ...

Yardsticks are very useful around the house when you need a measurement. (I have also used them to fish out toys the cat knocked under a low piece of furniture.) They are standards by which we can ...

Since the 1960s, a class of special pulsating stars has stymied scientists attempting to weigh them. The two main ideas for how to measure these stars' masses have so far produced vastly different ...