From this light curve, the author obtained the star’s period of 31.91 days, peak apparent magnitude of 18.6, minimum apparent magnitude of 19.8, average apparent magnitude of 19.2, and amplitude ...

How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger BradySan Quentin, California Cepheids are rare variable stars with periods ranging from about 1 to 120 ...

To estimate the changing brightness of a variable star, such as Algol (Beta [β] Persei), it’s best to directly compare it to other nearby stars of known magnitudes (marked above in green). The ...

Astronomers from the Center of Astronomical and Space Education in Moscow report the discovery of a new star, which turned out to be an eclipsing variable binary. The finding of the new star, which ...

“We applied our method to model the light emitted from the variable star R Hydrae, which exhibited a slowing of its period from 420 to 380 days between 1900 and 1950,” says Das.

Normally, Algol appears 3.3 times brighter than during the peak of the eclipse; it usually shines at magnitude 2.1, about equal to the star Almach (Gamma Andromedae), but at intervals of 2.867 ...