Kepler Mission |
Kepler Mission |
Sep 24 2005, 04:23 PM
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#1
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Member Group: Members Posts: 147 Joined: 3-July 04 From: Chicago, IL Member No.: 91 |
This NASA Discovery mission is to be launched in June 2008 and will search for Earth-size and smaller planets. Launch was originally scheduled in 2007 but delayed by 8 months due to "funding constraints".
Here's the official web site: http://www.kepler.arc.nasa.gov/ |
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Mar 7 2009, 08:28 PM
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#2
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Yes, the radial velocity method can determine the eccentricity...
-------------------- Steve [ my home page and planetary maps page ]
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Mar 7 2009, 09:56 PM
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#3
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Newbie Group: Members Posts: 17 Joined: 5-January 06 Member No.: 636 |
Yes, the radial velocity method can determine the eccentricity... Using spectroscopy/doppler shift measurements? That's possible for Earth-sized planets? Even if there's a Jupiter-sized planet in the same system(messing things up)? Wow. I think I'll have to try to crunch some numbers on that, to get my head around it. The more I think about it, the more amazing the process of making those measurements, and disentangling them, becomes. Thanks. |
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Mar 8 2009, 03:06 PM
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#4
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Using spectroscopy/doppler shift measurements? That's possible for Earth-sized planets? Even if there's a Jupiter-sized planet in the same system(messing things up)? Wow. I think I'll have to try to crunch some numbers on that, to get my head around it. The more I think about it, the more amazing the process of making those measurements, and disentangling them, becomes. Thanks. Well I should qualify that the radial velocity method generally works for planets larger than the Earth, depending on how close they are to their parent star. I've heard radial velocity limits between .3 and 3 m/s that would depend on the brightnesss of the parent star. http://kepler.nasa.gov/sci/capabilities.html It can determine the eccentricity though as well as work with multiple planets to disentangle the individual signals. -------------------- Steve [ my home page and planetary maps page ]
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