Archives for the 'nebula' Category
X-Ray Crab
Published on 7 Nov 2008 at 5:13 pm.
1 Comment.
Filed under astronomy, nebula, neutron stars.
Messier 1, the Crab Nebula, is a famous supernova remnant in Taurus. It was left behind by the supernova visible from Earth in 1054. The Crab Nebula is about 6000 light years away. The image above is a composite make from three different instruments. The green and dark blue images […]
Barnard 68
Published on 26 Mar 2008 at 7:06 am.
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Filed under nebula.
When I first saw this ESO image of Barnard 68 on the Astronomy Picture of the Day site, I recalled an old Star Trek episode, The Immunity Syndrome, where the Enterprise finds a zone of darkness that looks like a hole in the star field. Naturally, Captain Kirk decides to go inside, and there […]
Eye of Sauron
Published on 9 Jan 2008 at 10:39 pm.
1 Comment.
Filed under conference blogging, nebula.
This is an infrared image of NGC 7293, also known as the Helix Nebula. It is an example of a planetary nebula. The term “planetary” does not mean that the nebula has anything at all to do with planets. Rather, it is a holdover from the terminology used by William Hershel, who […]
Clouds in space
Published on 24 May 2007 at 2:17 am.
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Filed under nebula.
It has been cloudy here the last few days. But, that got me to thinking about clouds in space. Interstellar space is not empty. There are lots of things out there. Granted, these things are so far apart, and space has such low density that it is more empty than the best […]
MWC 922 Nebula
Published on 28 Apr 2007 at 8:10 am.
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Filed under nebula, stars.
A team of astronomers led by Peter Tuthill (University of Sydney) and James Loyd (Cornell University) has found a rather remarkable nebula. It looks like a square! In fact, they have nicknamed the nebula the “Red Square.” Well, actually, it isn’t really square, but it sure looks that way in a photograph. […]
Herbig-Haro Objects
Published on 22 Oct 2006 at 11:15 pm.
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Filed under nebula.
In the early 1980’s, two astronomers, George Herbig and Guillermo Haro, discovered that there were often small bits of nebulosity associated with star formation. These small glowing nebulae often occured in pairs on either side of a protostar, or a very young star. That alone would have been significant, but what is […]
