Cepheid variable stars exhibit regular pulsations whose period directly correlates with their intrinsic brightness (absolute luminosity). The Leavitt law establishes this relationship between ...

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 ...

Over the 25 years I’ve written this column, I’ve often marveled at the mind-boggling distances to many celestial objects. Astronomers don’t often use miles to express stellar and galactic distances ...

Ninety years ago, Harvard astronomer Henrietta Leavitt spent years painstakingly examining thousands of sky photographs to search for and study variable stars. Her laborious hunt led to the discovery ...

In 1925, astronomer Edwin Hubble identified a Cepheid variable star, known as V1 ... them reliable "standard candles" for distance measurement. By comparing their known luminosity with their observed ...

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 "cosmic ...

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 ...

High-resolution images show large spots on the surface of Polaris. Researchers using Georgia State University's Center for High Angular Resolution Astronomy (CHARA) Array have identified new details ...

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 ...