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Stories about: light echo |
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Cassiopeia A is a supernova remnant located about 9,000 light years away from Earth which was created by a supernova explosion somewhere around the year 1680 and one of the brightest radio sources in the sky. Although modern observations taught much about the expanding remnant, one particular problem remained to be s... |
30 May 2008
02:44 GMT |
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By using the Chandra X-ray Space Observatory and the XMM-Newton Space Observatory, astronomers were able to observe a light echo originating from a supernova explosion in the Large Magellanic Cloud, which was first observable from Earth nearly 400 years ago. The supernova remnant, dubbed SNR 0509-67.5, lies 160,000 l... |
21 April 2008
08:27 GMT |
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Light echoes are generated when interstellar or intergalactic gas is ionized by electromagnetic emissions originating several light years away, and responds accordingly by releasing the surplus energy by emitting light. By observing such light echoes, astronomers can witness events that occurred several hundred of th... |
19 April 2008
04:04 GMT |
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With the help of light echoes, astronomers have been recently able to measure the brightness of a supernova explosion which took place about 400 years ago. The so-called SNR 0509-67.5 supernova remnant is located in the Large Magellanic Cloud, a galaxy in the near vicinity of our own Milky Way. While the original lig... |
20 March 2008
12:25 GMT |
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European Space Observatory astronomers claim to have successfully measured the distance to a Cepheid star inside our galaxy, with a precision of about 1 percent, making it the most accurate stellar distance measurement ever. The observations have been conducted at ESO's New Technology Telescope at La Silla by le... |
11 February 2008
03:58 GMT |
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