Genna Wilchek
Wednesday, August 10, 2011
Astrophysics, help please?
Cepheid variable stars vary in brightness as the result of pulsations of their surface and atmospheres.Luminosity is a stars absolute brightness and is expressed as magnitude
No comments:
Post a Comment
Newer Post
Older Post
Home
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment