Spaceman Spiff recently posted an
article describing Caltech cosmologist Sean Carroll's
Preposterous Universe site and its
Cosmology Primer and
FAQ pages.
Current FAQ questions:
Quote:
What is the universe expanding into?
Are distant galaxies moving faster than the speed of light? Wouldn't that violate relativity?
Does the universe have a center?
Could we detect the expansion of the universe by trying to measure the expansion of the solar system?
Is the universe finite or infinite? Will it recollapse or expand forever?
Is space flat or curved? I've heard both.
Is energy conserved in an expanding universe?
What is the difference between dark matter and dark energy?
Will we ever be able to detect dark matter or dark energy directly?
Isn't "dark energy" just like the older concept of the "ether"?
How do you know that dark matter isn't just ordinary matter that we can't see?
Could the inferred existence of dark matter and dark energy be due to a modified behavior of gravity?
Is inflation testable?
What came before the Big Bang?
Is our universe the only one, or are there others?
|