and elsewhere have detected 278 variable stars in the open cluster NGC 6791 and its surroundings. The finding was reported in a paper published March 13 on the arXiv pre-print repository.

Chinese astronomers have conducted a study of variable stars in the galactic open cluster ... paper published September 11 on the arXiv pre-print repository. Estimated to be about 300 million ...

The simple answer is that the intrinsic brightness of these variable stars is strongly tied to their period. This is the famous period-luminosity relationship discovered by Henrietta Leavitt more ...

Since then, I’ve forwarded more than 80,000 visual brightness estimates of variable stars to this noble organization. Each one wound up in a database that the AAVSO makes available to ...

"We came across a group of outbursting variable stars exhibiting very characteristic triangle-shaped symmetrical outbursts that did not resemble any previously known variable stars." Superman isn ...

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 ...

One of my principal arguments against the theory was that, if it were true, all cool stars should be variable, and I still see no reason to alter my views. The observations of the red stars by ...

Notwithstanding the importance of the results which the observation of them bids fair to offer concerning the nature of the sidereal universe, the variable stars have not attracted so much ...

This article is more than 6 years old. Ancient Egyptian astronomers may have discovered variable stars, and calculated the period of a well-known one called Algol, thousands of years before Europeans.

The first key, the period-luminosity scale discovered by Henrietta Leavitt, allowed astronomers to calculate the distance to variable stars from Earth. Hubble had already used this knowledge in ...