Exoplanet Discoveries, discussion of the latest finds |
Exoplanet Discoveries, discussion of the latest finds |
Guest_PhilCo126_* |
Apr 21 2009, 11:10 AM
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Guests |
Well-known exoplanet researcher Dr Michel Mayor ( discoverer of Peg 51b with Dr Didier Queloz in 1995 ) today announced the discovery of the lightest exoplanet found so far. The planet, “e”, in the famous system Gliese 581, is only about twice the mass of our Earth. The team also refined the orbit of the planet Gliese 581 d, first discovered in 2007, placing it well within the habitable zone, where liquid water oceans could exist:
http://www.eso.org/public/outreach/press-r...9/pr-15-09.html |
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Feb 23 2017, 07:38 PM
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#2
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
When will we know we have fathomed the'norms of system architecture'? I'd say: when nature is no longer able to surprise us.
Not so very long ago people were willing to make general statements to the effect that other planetary systems, if they existed at all, would probably be much like our own. It seems to me the main thing we've learned since then is just how far we are from knowing the full scope of possibilities. It's not only hard parameters like system geometry, instrumental limitations and the like which cause biased data sets. There's a human contribution too because premature generalisation can all too easily limit what one chooses to go looking for. Now that one is going to be really hard to quantify. EDIT - Fred I was going from this map when I estimated 1 degree: http://www.trappist.one/images/aquarius_T1_thin.jpg |
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Lo-Fi Version | Time is now: 22nd September 2024 - 10:41 PM |
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