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 ...

Physicists have improved the accuracy of a technique that uses variable stars to measure distances in the universe, providing a new figure for its expansion rate. When you purchase through links on ...

Astronomers from the University of Warsaw, Poland and elsewhere have detected a new classical Cepheid variable star. The newfound star, which received designation OGLE-GD-CEP-1884, has the longest ...

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of ...

At the center of these side-by-side images is a special class of star used as a milepost marker for measuring the universe’s rate of expansion – a Cepheid variable star. The two images are very ...

The Cepheid variable stars, whose fluctuating light beams enable measurement of great interstellar distances, may prove also to hold important new clues to forces at work within the great island ...

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 ...

THE oscillations induced in the principal modes of vibration of a star by a free oscillation in one of them, generally of the second order in the corresponding free amplitude, are unimportant unless ...

CEPHEID (variable stars—the name given to stars which behave like δ Cephei—have played a distinguished part in modern astronomy. Their most characteristic feature—that there is a definite relation ...