Tuesday, July 12, 2005

Is the Universe Infinite?

What types of matter and energy fill the universe? How much of each?
How rapidly is the universe expanding today?
How old is the universe today?
What is the overall shape of the universe? Open, flat, closed, or otherwise?
How is the expansion changing with time?
What is the ultimate fate of the universe?
The shape of the universe is determined by a struggle between the momentum of expansion and the pull of gravity.
http://map.gsfc.nasa.gov/m_uni/uni_101shape.html

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