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!

Cepheid variables are a type of star that undergo regular pulsations. The length of a Cepheid’s pulsations is always related to its intrinsic, or absolute, brightness in a simple way: The longer ...

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.

Roger BradyTamal, California Cepheid variables are a type of star that undergo regular pulsations. ... Story by Astronomy Staff • 4mo. How do Cepheid variables indicate distance? Roger Brady.

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' ...

Researchers using the testbed interferometer at Palomar Observatory have achieved the best-ever distance measurement to a type of star known as a Cepheid variable. The new results improve the ...

When Edwin Hubble observed the variable Cepheid star V1 in 1923, it changed the course of astronomy forever. The Hubble Space Telescope recently went back to observe this star again.

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 ...

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 ...