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Yes, I would imagine a large asteroid belt could form into relatively large enough objects to be considered as planets. Planetoids are just names for another size of an object. Pluto for instance, is too small to be a planet.
I sorta think (meaning I'm making a wild guess) that more than one body is required to form a somewhat stable system.
Quote from: Geezer on 10/04/2012 17:08:05I sorta think (meaning I'm making a wild guess) that more than one body is required to form a somewhat stable system.Geezer - In my opinion that's a very respectable response. In my experience at posting in physics forums over the last 14 years people would far too often post what is really speculations as fact when in actuality it was a mere guess. Bravo to you good Sir!
A fairly large proportion of stars are "double stars" -- two suns orbiting each other. With double stars, there is no necessity for planets to form during the accretion stages of formation, and even if they do there are no stable planetary orbits. So "double star" systems have no planets.I do not see how a star could form from a cloud of dust and gas into a single body, but I am not an expert, or even well read up in this area. I think that if a star does not have a companion star, then it must have had a planetary system at some stage of its evolution. Conservation of angular momentum pretty much guarantees it.
just don't blame me if it causes a power outage in your neighborhood.
Quote from: Geezer on 29/04/2012 01:17:16 just don't blame me if it causes a power outage in your neighborhood.Oh,Is it infected with the Bad Times Virus?