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November 20, 2009
A Movie of Motions Around a Young Star
The famous Orion Nebula is the closest nursery of massive young stars to the earth, and is about 1300 light-years away. The nebula is part of a giant molecular cloud that hosts several clusters of hot young stars, with the brightest young star in the nebula, called Source I, shining with the luminosity of 100,000 suns.
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November 13, 2009
Mysterious X-rays from a Nearby Galaxy
The nucleus of an active galaxy, an AGN, contains a massive black hole that is vigorously accreting material. In the process it typically ejects jets of particles and radiates brightly at many wavelengths, in particular at X-ray wavelengths.
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November 06, 2009
In a Galaxy Far, Far Away...
Astronomers have just published the discovery of the farthest known object in the cosmos: a star that exploded when the universe was only 630 million years old -- only 4.6% of its current age.
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