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发帖数: 298 | 1 An X-ray of the Whirlpool
By David Tytell
July 2, 2002 | Few celestial objects capture the essence of astronomy. These
are the fundamental images — views that invoke both wonder and familiarity.
Surely on that list is the Whirlpool Galaxy (M51). It practically defines
spiral galaxies, and it has been seen by nearly every telescope ever built,
from backyard scopes to the Hubble Space Telescope.
Now Andrew Wilson (University of Maryland) and his colleagues using the
Chandra X-ray Observatory have, |
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