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 ...

New research offers the most precise measurements yet of pulsating Cepheid stars, which may hold clues about the immense size and scale of our universe. Cepheids are a type of variable star that ...

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 ...

This image of NGC 5468, a galaxy located about 130 million light-years from Earth, combines data from the Hubble and James Webb space telescopes. This is the farthest galaxy in which Hubble has ...

ABOVE: This composite photo by NASA, ESA, the Hubble Heritage Team and R. Gendler shows the Andromeda Galaxy. The Cepheid variable star V1 is indicated with an arrow, and four inset images show the ...

Researchers have discovered that Cepheid variable stars in our neighboring galaxy, the Small Magellanic Cloud, are moving in opposing directions along two distinct axes. They found that stars closer ...

Arrows show the velocities of approximately 4,000 Cepheid variable stars. Green arrows represent closer stars, while magenta arrows indicate more distant stars. The green star (★) marks the average ...

Very Large Telescope Interferometer, a team of French and Swiss astronomers [1] has measured directly the change in angular diameter of four southern Cepheid variable stars over their pulsation cycle.

As a response to the Kepler white paper call, we propose to keep Kepler pointing to its current field of view and continue observing thousands of large amplitude variables (Cepheid, RR Lyrae and delta ...

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 ...

New research offers the most precise measurements yet of pulsating Cepheid stars, which could reveal new clues about the immense size and scale of our universe. When you purchase through links on our ...