Variable stars
Topic: Category
From Wikipedia - Reading time: 1 min
Variable stars are stars which vary considerably in brightness on much shorter time scales than most stars, which, like our own sun, are of nearly constant luminosity.
Wikimedia Commons has media related to Variable stars.
Licensed under CC BY-SA 3.0 | Source: https://en.wikipedia.org/wiki/Category:Variable_stars15 views | ↧ Download as ZWI file
EncycloReader
is supported by the 
KSF