Re: star-ships?

From: CYMM (
Date: Tue Oct 10 2000 - 06:54:56 MDT


The Orion region is loaded with exceptionally high mass densities when
compared with open interstellar space.

Thus the mass concentration mechanisms inherent in a star's gravitational
collapse might not be needed for spontaneous planet formation in
interstellar space of that region.

It would be nice to suppose otherwise though...


-----Original Message-----
From: Damien Broderick <>
To: <>
Date: Monday, October 09, 2000 9:47 PM
Subject: star-ships?

>An amusing conceit:
>>Scientists have discovered 18 planet-like objects, drifting free of
>> any central star, in a region of the Orion constellation. If
>> young, cool bodies are in fact planets, these free floaters
>> pose a considerable challenge to current theories about how
>> planets form.
>>The team determined the objects' mass by plugging their data into
>> models of planet and brown dwarf formation. Researchers
>> generally classify bodies less than 13 times the mass of
>> (13 Jupiter masses) as planets, and bodies between 13 and 75
>> Jupiter masses as brown dwarfs.
>> The model results vary a bit depending on the objects' age,
>but are
>> mostly well within the range for planets. Sigma Orionis is
>> probably 5 million years old, so if the objects are equally
>> they are probably 8-15 Jupiter masses. If they are only 1 My,
>> fainter ones could be as small as 5 Jupiter masses.
>Uh, Robert, I don't suppose...

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