SIGHTINGS


 
2000 Asteroids Could
Hit Earth - Only 200
Located So Far
www.mirror.co.uk
3-20-99
 
Anyone who saw the Bruce Willis movie Armageddon and dismissed it as fantasy should think again - the end of the world really could be nigh.
 
Astronomers say there are some 2,000 asteroids in orbits that COULD lead to a collision with Earth - and they only know the whereabouts of 200 of them.
 
So they are urging governments to take the cosmic threat seriously and fund asteroid tracking projects that could give us warning of an impending cataclysmic "deep impact" collision.
 
British astronomers are desperate for £5 million funding over a ten year period to do their bit in an international team searching the heavens.
 
Professor Mark Bailey, of Armagh Observatory, says: "At the moment, the Americans are discovering most of the asteroids and we have no direct funding.
 
"Ideally, we want to build a new telescope somewhere in the southern hemisphere because America's three are all trained on the northern hemisphere and we have blind spots up there."
 
NASA say it is possible to either blow up an incoming asteroid, or knock it off course, but they would need time.
 
Professor Bailey says: "This is the biggest threat facing mankind but it's preventable. As things stand, though, we could have only 20 seconds warning."
 
The threat from space is indeed terrifying.
 
In August last year, a 1.6km wide asteroid - big enough to spark a nuclear winter - passed within six hours of the Earth.
 
"In space terms, that is very close," says Liberal Democrat MP Lembit Opik, one of the few politicians to support a "spaceguard" programme.
 
"It equates to the leader of the opposition standing at the Dispatch Box, throwing a marble at the Prime Minister in a fit of pique, and missing his head by 2mm."
 
A direct hit took place in 1908, when a small comet-like object exploded in the atmosphere above the Tunguska river valley in Siberia.
 
It had the explosive power of 10 million tonnes of TNT and had it struck London, everything within the M25 would have been destroyed. As it was, trees in a 20km radius were levelled.
 
Other countries are starting to take the threat more seriously.
 
In Japan, a £15 million project is under way, and France and Germany are pooling resources.
 
The chances of an asteroid or comet hitting the earth are estimated at 100,000 to one every year.
 
The odds sound generous but are worryingly short compared with your one in 14 million chance of winning the Lottery.
 
But DTI minister John Battle says the Government "had to steer a course between the panic of the immediate moment and deep complacency.
 
"I wish to make it clear that the chances of the Earth being hit by any large near-Earth object during our lifetime is remote. But that is not an excuse and such events have happened in the past."





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