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Hunting For Other Planets
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Hunting For Other Planets
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Hunting For Other Planets
Paul O'Neill wrote:
So you're saying they have looked for planets there, but found none? I said nothing of the sort. Over 100 extra-solar planets have been found. Mike Miller |
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Hunting For Other Planets
In article ,
"Paul O'Neill" wrote: Basically, being close does not make it easier to spot planets. The methods currently being used to find extra-solar planets require certain rare sets of circumstances. The planets have to fall into the following categories (roughly speaking): 1) Big and close to a star, so the wobble on the star is obvious 2) Pass between the star and Earth, so the slight dimming effect is noticeable. That's not the complete story, but planets that meet those conditions (especially the first) are currently easiest to find, AFAIK. Nearby solar systems generally don't have those conditions. So you're saying they have looked for planets there, but found none? Right, which doesn't imply anything about whether planets exist -- it implies only that planets *of the sort we can detect* do not exist. No massive, super-Jupiter-sized planets orbiting very close to the star. This is actually a good thing, if you're interested mainly in terrestrial planets. The hot Jupiters we're mostly able to find at this point don't bode well for terrestrial planets in the same system. ,------------------------------------------------------------------. | Joseph J. Strout Check out the Mac Web Directory: | | http://www.macwebdir.com | `------------------------------------------------------------------' |
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