Kids Search. The Best Search Engine for K-12 Kids and Children.     

   web | images | video | facts | wiki | news | games | kidztube | apps








report a search problem







COMPANY RESOURCES LINKS SOCIAL
contact us education daily journal home facebook
about us make us your default search kidztalk twitter  
terms/privacy blocking websites kidznet pinterest  
advertise teacher zone wiki    
media link to us learning sites    
business / api solutions add a site image search    
affiliate program kidzsearch apps kidztube    
play youtube on kidzsearch games    
  voice search music    
  report a problem cool facts    
  settings news    
    search help    
    kidznet directory    
         










 mobile version

      Copyright 2005-2021 KidzSearch.com 
Cepheid L Carinae

A variable star is a star that is sometimes brighter or dimmer. Most stars have only very small differences in brightness, like the Sun. But some stars can vary hugely.

There are generally two types of variable stars:

  • A star being eclipsed, where the changes in brightness are from perspective, are called extrinsic variables. For example, in a solar eclipse the moon gets between the sun and Earth. Binary star systems sometimes show eclipses, as do planetary systems with giant planets.
  • Stars whose brightness actually changes are called intrinsic variables. The stars get bigger and smaller over time. Some pulsate at a constant rate, some do not. All of them change the rate at which energy is put out, which changes their appearance to us.
 view more...