Suns Hidden Twin Stalks Planet Earth
太阳隐藏着的小兄弟威胁着地球
[1] When the end of the world comes, we'll know what to blame. Scientists have found compelling evidence that the Sun has a baby brother, a dark star whose eccentric orbit is responsible for periodically showering the Earth with comets and meteorites.
[2] The dark star--named Nemesis by astronomers--is thought to be a brown dwarf" that spins round the Sun in an orbit so large it is measured in light years, the distance light travels in a year, equivalent to about 6,000 billion miles.
[3] The research suggests that, every 26m years, the star's eccentric orbit brings it within one light year of the solar system. There it causes havoc in the Oort Cloud, a huge region surrounding the solar system that contains billions of bits of cosmic rubble left over from the formation of planets.
[4] Of the millions of rocks it throws out of orbit at each visit, some hurtle Earthwards--and have several times nearly wiped out life on Earth.
[5] Astronomers have long wondered if the Sun has a smaller partner. Recently, two independent groups of researchers have found evidence of one.
[1]当世界末日来临时我们将知道该去责备什么。科学家们已发现明显的迹象表明:太阳有一个小弟弟,它是一颗暗星,其偏心轨道导致彗星群和流星雨周期性降落地球。
【英语短文:小兄弟威胁着地球 1】相关文章:
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