Two decades ago, astronomers spotted one of the brightest exploding stars in more than 400 years.
Since that first sighting, the doomed star, called Supernova 1987A, has continued to fascinate astronomers with its spectacular light show. NASA's Hubble Space Telescope is one of many observatories that has been monitoring the blast's aftermath. The supernova is located 163,000 light-years away in the Large Magellanic Cloud.
This image shows the entire region surrounding the supernova, the most prominent feature of which is a ring with dozens of bright spots, shining like cosmic pearls. Unleashed by the stellar blast, this material is slamming into regions along the ring's inner regions, heating them up, and causing them to glow. The ring, about a light-year across, was likely shed by the star about 20,000 years before it exploded.
This image was taken in December 2006 with Hubble's Advanced Camera for Surveys.
Image credit: NASA, ESA, P. Challis and R. Kirshner (Harvard-Smithsonian Center for Astrophysics)
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Wednesday, March 07, 2007
Cosmic Pearls
Microsoft Set to Blast Google over Copyright
SEATTLE (Reuters) - Microsoft Corp. is set to launch a blistering attack on rival Google Inc. on Tuesday for what the software giant argues is the Web search leader's "cavalier" approach to copyright protection.
"In essence, Google is saying to you and to other copyright owners: 'Trust us - you're protected. We'll keep the digital copies secure, we'll only show snippets, we won't harm you, we'll promote you,'" Rubin argues in his speech.
"But Google's track record of protecting copyrights in other parts of its business is weak at best," he said.
David Drummond, Google's senior vice president for corporate development and its chief legal officer, said in response that Google works with more than 10,000 publishing partners to make books searchable online and has recently added the BBC and NBA basketball league as YouTube video partners.
"We do this by complying with international copyright laws, and the result has been more exposure and in many cases more revenue for authors, publishers and producers of content."
Rubin sides with publishers in criticizing Google's ambitious plan to scan millions of published works in the world's great libraries and make them available to consumers via its Google Book Search system. He said by scanning copies of published works without first seeking copyright holders' permission, Google opens the door to massive infringement.
The attorney also says Google's defense of 'fair use' is overly broad. "Concocting a novel "fair use" theory, Google bestowed upon itself the unilateral right to make entire copies of copyrighted books," Rubin argues.
Drummond replied: "The goal of search engines, and of products like Google Book Search and YouTube, is to help users find information from content producers of every size."
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