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Is there a pulsar at the center of our galaxy?
There appears to be a pulsar - a rapidly spinning dead star - located about a light-year from the black-hole center of our galaxy.
September 23, 2009
GD 50, a runaway star, maybe from Pleiades
GD 50 was born in the Pleiades star cluster, then was flung out, possibly after passing too close to another star.
September 17, 2009
Portrait of Andromeda Galaxy in ultraviolet
If you were on a planet orbiting a star in this Andromeda Galaxy, and could look back our Milky Way galaxy, it's thought our home galaxy would look a lot like this.
September 16, 2009
A solid, rocky world 500 light-years away
This is the first time that the density has been measured for such a small exoplanet, and the measurements suggests a solid, rocky world.
September 16, 2009
Did small galaxies come together to make big galaxies?
Astronomers believe that it's from humble "building blocks" that mighty galaxies like our own Milky Way grew into giants.
September 16, 2009
Black hole, compact, dense, how do they form?
Cygnus X-1, an x-ray source, was one of the first black hole candidates to be discovered. It is thought to contain a black hole orbited by a bright, young star.
September 15, 2009
Can I see our galaxy from Earth?
On a very dark clear night - and if you look in the right direction - you can see a bright region of our own Milky Way galaxy.
September 15, 2009
Is red Antares bigger than our sun?
The ancients saw red Antares as the ruby Heart of the Scorpion in the constellation Scorpius. This star has since ballooned in size.
September 15, 2009
Ted Bergin: ‘Space clouds contain water enough to fill oceans’
Ted Bergin says Space clouds, many light-years in size, collapse to form stars and planets. Some may contain the building blocks of life.
September 14, 2009
Black hole at the center of our galaxy
Astronomers believe there's a supermassive black hole in the center of our Milky Way galaxy. The orbits of stars near the center reveal a huge amount of mass inside a very small volume.
September 14, 2009
