New James Webb Space Telescope results have revealed that there may not be a Hubble tension after all. But contradictions within the findings point to a deeper mystery.

The star Polaris marks the North Celestial Pole in our sky, around which all other objects in the heavens appear to rotate.

Astronomers use the well-known period-luminosity relationship of Cepheid variable stars to calculate distance across the cosmos. Skip to content Introducing the all-new Astronomy.com Forum!

How do we get distances in astronomy if we can't bounce radar off of objects? How exactly do parallax and Cepheid variables help? Newsletters Games Share a News Tip. Featured. Featured.

Astronomy Radio signals from the dawn of time could help 'weigh' the universe's 1st stars Astronomy Astronomers see the 1st stars dispel darkness 13 billion years ago at 'Cosmic Dawn' ...

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 ...

Hubble worked hard, taking images of spiral nebulae every clear night and looking for the telltale variations of Cepheid variables. By the end of 1924, he had found 12 Cepheids in M31.

Cepheid variables are a type of star that pulsates radially, varying in diameter and temperature, which results in changes in their brightness over regular periods.

Hubble worked hard, taking images of spiral nebulae every clear night and looking for the telltale variations of Cepheid variables. By the end of 1924, he had found 12 Cepheids in M31.

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 ...