A persistent, nagging problem with the expansion speed of the Universe may not require a rewrite of everything we know about physics. New measurements taken using the James Webb Space Telescope ...

Add Yahoo as a preferred source to see more of our stories on Google. An image of the Cepheid variable star RS Puppis. An image of the Cepheid variable star RS Puppis. The most accurate observation to ...

This Hubble Space Telescope image shows RS Puppis, one of the most luminous Cepheid variable stars. It rhythmically brightens and dims over a six-week cycle. (ASA, ESA, Hubble Heritage Team ...

A new study under the SPECTRUM project updated radiative opacity tables in hydrodynamical pulsation models for Classical Cepheid and RR Lyrae stars. The results show only minor shifts in instability ...

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 ...

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 ...

NASA’s Hubble Space Telescope has been trained on a single variable star that in 1923 altered the course of modern astronomy. V1 is a special class of pulsating star called a Cepheid variable that can ...