Is it a star, is it a planet, is it dark matter?

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Is it a star, is it a planet, is it dark matter?
« on: 05/08/2006 00:08:10 »

A pair of strange new worlds that blur the boundaries between planets and stars have been discovered beyond our Solar System.
A few dozen such objects have been identified in recent years but this is the first set of "twins".
Dubbed "planemos", they circle each other rather than orbiting a star.
Their existence challenges current theories about the formation of planets and stars, astronomers report in the journal Science.
"This is a truly remarkable pair of twins - each having only about 1% the mass of our Sun," said Ray Jayawardhana of the University of Toronto, co-author of the Science paper.
"Its mere existence is a surprise, and its origin and fate a bit of a mystery."
'Double planet'
The pair belongs to what some astronomers believe is a new class of planet-like objects floating through space; so-called planetary mass objects, or "planemos", which are not bound to stars.

How many of these could there be?

How much of the universes mass could be attributed to objects such as this?



Offline ukmicky

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Re: Is it a star, is it a planet, is it dark matter?
« Reply #1 on: 05/08/2006 01:06:09 »
George thankyou, ive been looking for this story.