How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger Brady San Quentin, California Cepheids are rare variable stars with periods ranging from about 1 to 120 ...

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 ...

A decade of observations by NASA’s Hubble Space Telescope has produced the sharpest and most detailed images of the Andromeda ...

Using ESA's XMM-Newton spacecraft, astronomers have conducted X-ray observations of a peculiar Cepheid variable star known as V473 Lyr. Results of the study suggest that this star has a young, low ...

The star RS Puppis is one of the most luminous Cepheid variable stars, exhibiting a six-week cycle of changing brightness. (Image credit: NASA, ESA, Hubble Heritage Team (STScI/AURA)-Hubble/Europe ...

This marks the first time a Cepheid variable—a strange, pulsating type of star that includes Polaris—has been observed up close.

Cepheid variable stars are believed to be large, hot stars five to 20 times as massive as the sun. They vary in light output by pulsating; the star contracts and expands.

It contains a Cepheid variable star pulsating every 3.8 days. The other star is slightly bigger and cooler, and the two stars orbit each other in 310 days.

The researchers gathered 2,330 Cepheid variables catalogued by an infrared telescope called the Wide-field Infrared Survey Explorer, and whittled down the list to 1,339 stars based on their ...

In 1903, she was tasked with searching for Cepheid variable stars, or stars that consistently change brightness. By 1908, she had cataloged 1777 variable stars, and had made the discovery of a ...

Returning to those spots, as the CHARA team says, these high-resolution images of Polaris mark the first "glimpse of what the surface of a Cepheid variable looks like." ...

The Cepheid variable star V1 is indicated with an arrow, and four inset images show the star’s variable brightness over several weeks. It helped determine that Andromeda was another galaxy ...