70 Virginis: Difference between revisions
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Nice artist's conception [here|http://business.fortunecity.com/soros/98/70vir.html] |
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Unfortunately, all of the "Goldilocks" reports are based on |
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old data... If you read the 1996 paper by Geoff Marcy you |
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will find him using a parallax of ".112 (29 light years) & |
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a spectral type of G4V. This is where the often quoted |
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surface temperature of 80 degrees Celsius is derived. However, |
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that star is now known to be much farther away, & a subgiant. |
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[Hipparchos|http://astro.estec.esa.nl/Hipparcos/HIPcatalogueSearch.html] gives its parallax as ".05522 (59 light years), which makes the |
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new planet far too hot to ever have liquid water, unless under |
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an atmosphere near the critical point of water. |
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Too bad for science fiction! |
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Revision as of 19:59, 14 January 2002
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