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What is the Palermo Impact Scale?

The Palermo Technical Impact Scale allows scientists to rate the level hazard represented by a potential impact. The Palermo Scale actually a measure of the probability that the collision will occur compared with the collision of a random NEO at anytime before the predicted impact. Values on the Palermo Scale of between -2 and 0 warrant monitoring of the object. Positive values merit concern.

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© NEO Information Centre
last updated on 25/09/06
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Is Pluto a planet? Astronomers meet in Prague to decide 16/08/06

Members of the International Astronomical Union are currently meeting in Prague to decide on an official definition of a planet. Their decision could see the Solar System�s ninth planet Pluto downgraded or other objects upgraded in status.

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