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Nemesis theory

  1. Apr 7, 2006 #1
    I herd of a theory about red or brown dwarf that is a companion star with the Sun.I looked on wikipedia it doesn't too much about it.
    Dose anyone know if there's been any stars that could possible Nemesis or if there's any evidnce of it's existance.
  2. jcsd
  3. Apr 7, 2006 #2

    Math Is Hard

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    I believe this idea came from Walter Cruttenden (I think he was interviewed once on Coast to Coast AM):
    but I fell asleep during the interview so I really don't remember all that he had to say. Made a nice bedtime story, though!
  4. Apr 10, 2006 #3


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    In terms of the original idea (a small star, or super-Jupiter, in a highly elliptical orbit, stirring up the Oort cloud and so creating mass extinction events here on Earth), it's dead - the periodicity in the fossil record is far from clear, there is no corresponding record of contemporaneous impacts on other solar system bodies, mass extinctions on Earth - with one notable, and possible two or three less notable, exceptions - cannot be tied to any impacts (by any of the usual measures), etc, etc, etc.

    In terms of the observational data, it's pretty clear there are no red dwarfs close enough to be in any quasi-stable orbit, nor white dwarfs. Brown dwarfs are not yet fully ruled out, but the region of parameter space they could inhabit, undetected to date, is small.
  5. Apr 10, 2006 #4


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    IRAS surveyed the entire sky in the IR and found no 'Nemesis' candidates. Deducing the existence of 'Nemesis' from the fossil record was a stab in the dark, and now rather convincingly ruled out.
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