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Czech scientists see growing risk of asteroid hitting Earth
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This is an artist impression obtained from The University of Warwick and The University of Cambridge shows a rocky and water-rich asteroid being torn apart by the strong gravity of the white dwarf star GD 61. (Warwick & Cambridge Universities via AFP/Mark A. Garlick)
T
he risk is growing that Earth will be hit by an asteroid from a meteor stream known as the Taurids, Czech astronomers said on Tuesday.
The astronomers, from the Czech Academy of Sciences, drew their conclusion after analyzing 144 bolides -- large meteors that explode in the atmosphere -- from the Taurids and detecting a new branch with at least two asteroids measuring 200-300 meters (220-330 yards) in diameter.
"Most probably, the branch also includes many undetected asteroids which are dozens of meters in diameter or larger," the Czech academy said in a press release.
"Hence, the danger of a crash with an asteroid grows markedly once every few years that the Earth encounters this stream of inter-planetary material."
Read also: NASA predicts 5 asteroids to fly close to Earth this year
The new branch comprises objects moving together around the Sun, and the Earth encounters it once every few years for a period of about three weeks.
"During this period, the probability of a collision with a larger object (of about dozens of meters in diameter) is markedly higher," the Academy said.
The asteroids are very fragile, but when they are this large they may penetrate deep into the atmosphere and pose a real threat of collision with Earth, it added.
The study urges further research to obtain "a better description of this real source of potentially hazardous objects large enough to cause a local or even continental disaster."
