Explorations: Introduction to Astronomy (Arny), 6th Edition

Chapter 18: Cosmology

Thought Questions

1
M31, the great galaxy in Andromeda and a member of the Local Group of galaxies, is approaching us. Does this mean that the Hubble law is wrong? Why?
2
Suppose the Hubble constant were discovered to be five times larger than is now believed. How would that affect our estimate of the age of the Universe?
3
Does it bother you that the Universe may expand forever?
4
Why do most stars, including our own Sun, contain more helium than the 24% formed during the Big Bang?
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Notice before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.