| | |  Editorials | Environmental 
Earth Under Attack From an Invisible Star?
 Economic Times
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March 13, 2010
London - In what sounds like a chilling script of a Hollywood science fiction, scientists have claimed that an invisible star, five times the size of Jupiter, might be lurking near our solar system, occasionally kicking deadly comets towards the Earth.
According to NASA scientists, the brown dwarf star is up to five times the size of Jupiter and could be responsible for mass extinctions that occur on Earth every 26 million years.
They believe, the star nicknamed Nemesis or "The Death Star" could be hidden beyond the edge of our solar system and only emits infrared light.
It is believed to orbit our solar system at 25,000 times the distance of the earth to the sun, 'The Sun' quoted the scientists as saying.
According to them, as the star spins through the galaxy, its gravitational pull drags icy bodies out of the Oort Cloud - a vast sphere of rock and dust twice as far away as Nemesis.
"These 'snowballs' are thrown towards Earth as comets, causing devastation similar to the asteroid that wiped out the dinosaurs 65 million years ago," the report said.
Professor John Matese, of the University of Louisiana at Lafayette, said most comets come from the same part of the Oort Cloud.
"There is statistically significant evidence that this concentration of comets could be caused by a companion to the Sun." |
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