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Black Holes Light Up
Not even light can escape a
black hole's grip, but gas
falling into a black hole
can heat up and become an
intense source of X-rays, at
temperatures up to 1,000
times hotter than the sun.
Astronomers use the Chandra
... > full story
Spotting Sun Spots
Sun spots are cooler regions
on the sun's surface held up
by magnetic fields, and they
can have dramatic effects on
space weather, disrupting
satellite communications.
Astrophysicists track them
with sophisticated tools,
... > full story
First Stars In The Universe
Astronomers removed light
from closer and better known
galaxies and stars from
pictures taken with the
Spitzer Space Telescope. The
remaining images are
believed to be the first
... > full story
Sun Darkens Electronics
Solar activity can wreak
havoc in communications
systems -- particularly
during coronal mass
ejections, when plumes of
electrically charged
particles hit earth's
... > full story
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