A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates. This variation may be caused by a change in emitted light or by ...
Three Cepheid variable stars, pulsating stars used to measure distance and age of objects, are visible in this view of the heart of the Milky Way.
There are over 41,638 known variable stars (2008), with more being discovered regularly, so a complete list of every single variable is impossible at this place (cf. GCVS
What Are Variable Stars? Things to Do; Find a Mentor; Online Forum for Help and Advice; Observing Tutorials. 10-Star Tutorial (Visual Observations of Variable Stars)
Variable star, Algol Encyclopædia Britannica, Inc. any star whose observed ... Variable stars may be classified into three broad types according to the origin ...
Variable Stars. Stars appear to shine with a constant light; however, thousands of stars vary in brightness. The brightness that a star appears to have (apparent ...
Variable Stars. When we look up at the night sky it is easy to imagine that the stars are unchanging. Apart from twinkling due to the effects of our atmosphere stars ...
AAVSO 49 Bay State Rd. Cambridge, MA 02138 email@example.com 617-354-0484
Welcome! On this website I provide information and experiences on practical astronomy, brief test reports, and in particular results of my own variable star observations.
Variable-star definition, a star that varies markedly in brightness from time to time. ... Cepheids and novae are examples of intrinsically variable stars.