Posting-frequency: semi-monthly (Wednesday)
Archive-name: astronomy/faq/part9
Last-modified: $Date: 2000/08/03 00:23:14 $
Version: $Revision: 4.0 $
URL: http://sciastro.astronomy.net/

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Section Contents

• News Headers
• Introduction
• Table of Contents
• I.01. What do we know about the properties of the Universe?
• I.02. Why do astronomers favor the Big Bang model of the Universe?
• I.03. Where is the center of the Universe?
• I.04. What do people mean by an "open," "flat," or "closed" Universe?
• I.05. If the Universe is expanding, what about me? or the Earth? or the Solar System?
• I.06. What is inflation?
• I.07. How can the Big Bang (or inflation) be right? Doesn't it violate the idea that nothing can move faster than light?
• I.08. If the Universe is only 10 billion years old, how can we see objects that are now 30 billion light years away? Why
• I.09. How can the oldest stars in the Universe be older than the Universe?
• I.10. What is the Universe expanding into?
• I.11. Are galaxies really moving away from us or is space-time just expanding?
• I.12. How can the Universe be infinite if it was all concentrated into a point at the Big Bang?
• I.13. Why haven't the CMB photons outrun the galaxies in the Big Bang?
• I.14. Can the CMB be redshifted starlight?
• I.15. Why is the sky dark at night? (Olbers' paradox)
• I.16. What about objects with discordant redshifts?
• I.17 Since energy is conserved, where does the energy of redshifted photons go?
• There are different ways to measure distances in cosmology?
• Copyright

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