Talk:70 Virginis: Difference between revisions
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:[Hipparchos|http://astro.estec.esa.nl/Hipparcos/HIPcatalogueSearch.html] gives its |
:[Hipparchos|http://astro.estec.esa.nl/Hipparcos/HIPcatalogueSearch.html] gives its |
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parallax as ".05522 (59 light years), which makes the |
: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 |
:new planet far too hot to ever have liquid water, unless under |
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Revision as of 20:00, 14 January 2002
Found this on the main page here:
- Nice artist's conception [here|http://business.fortunecity.com/soros/98/70vir.html]
- Unfortunately, all of the "Goldilocks" reports are based on
- old data... If you read the 1996 paper by Geoff Marcy you
- will find him using a parallax of ".112 (29 light years) &
- a spectral type of G4V. This is where the often quoted
- surface temperature of 80 degrees Celsius is derived. However,
- that star is now known to be much farther away, & a subgiant.
- [Hipparchos|http://astro.estec.esa.nl/Hipparcos/HIPcatalogueSearch.html] gives its
- parallax as ".05522 (59 light years), which makes the
- new planet far too hot to ever have liquid water, unless under
- an atmosphere near the critical point of water.
- Too bad for science fiction!
This isn't an encyclopedia article...I'm not sure what it is. Will we even want an article titled "70 Virginis"? --LMS