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Fraser
2003-Sep-28, 12:25 AM
SUMMARY: Asteroids in our solar system could be more numerous than previously thought according to a new survey done using the European Space Agency's Infrared Space Observatory (ISO). The ISO's survey indicates that there are between 1.1 million and 1.9 million asteroids larger than 1km in the main asteroid belt, located between Mars and Jupiter. This result is roughly double the number of asteroids estimated by previous surveys using other observatories.


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Planetwatcher
2003-Sep-28, 12:52 AM
This would also tend to mean that if the asteroids was once a planet, then this planet was at least twice the size it was thought to be.

Which I seem to remember it was once calculated that all the asteroids in the belt combined would make a planet no more than half the size of our Moon.
So now it would be at least as big as the Moon. :D

DippyHippy
2003-Sep-28, 05:06 AM
What's the latest theory on where the asteroids came from? I thought most people had dismissed the "broken planet" theory and now consider the asteroids to be merely the building blocks of a planet that never formed in the first place...

Any ideas? Anyone? Anyone? Bueller? Bueller? :blink: