The study of the history,
structure and dynamics of the Universe.

So far, we have been able to see out about 10 to 15 billion light-years distant.

- the size of the universe?

• Space.com
• Wikipedia

-  the age of the universe?

• How old is the Universe?-Wikipedia
• SPACE.com
• Age of the Universe-UCLA
• A recent news item stated that 13.7 Billion years [read HERE about the debate] is the current estimate of the age of the universe.

There are no easy or exact answers, but we will have new estimates from time to time as our technology and understanding improves, so stay tuned...

• Timeline of the Universe
• The Early Universe
• Frequently Asked Questions in Cosmology
• Rumors of a Strange Universe - APOD
• The Nature of the Universe Great Debate in 1998
• Big Bang Cosmology Primer - Paul Shestople, apparently  at UC Berkeley
• Simulating the Universe - APOD - a chunk of our universe as simulated by the Grand Challenge Cosmology Consortium.
• The Universe Evolves - APOD - a computer simulation depicting the evolution of our entire
  universe.
• A Universe in a Box - APOD
• Cosmological Issues from U of Oregon - a hard page.
• Our Hierarchical Universe

• Can Science and Religion Coexist?
• Religious cosmologies