Kepler Mission |
Kepler Mission |
Mar 19 2011, 08:55 PM
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#856
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
That very subject has been discussed in this very thread already.
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Mar 22 2011, 11:15 PM
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#857
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Member Group: Members Posts: 131 Joined: 31-May 08 From: San Carlos, California, USA Member No.: 4168 |
Back online.
http://www.nasa.gov/mission_pages/kepler/n...m-20110321.html Hopefully this was the "safe event to end all safe events" (the new firmware will cure the star tracker issue). |
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Mar 30 2011, 11:09 AM
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#858
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I'm not sure when this amazing digram was first released. Possibly someone has already posted a more direct link to it. Anyhow I've only just spotted it on yesterday's APOD, so for anyone else who hasn't already seen it here it is: http://apod.nasa.gov/apod/ap110329.html
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Mar 31 2011, 04:57 AM
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#859
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Amazing!
Roger Ebert posted it too (not perfectly described, but nice to see it shown anyway): http://blogs.suntimes.com/ebert/2011/03/a_...ce_of_dust.html |
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Mar 31 2011, 05:00 AM
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#860
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
It's a profound image indeed, and it will resonate.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Mar 31 2011, 10:32 PM
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#861
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Member Group: Members Posts: 166 Joined: 20-September 05 From: North Texas Member No.: 503 |
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Apr 1 2011, 12:50 AM
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#862
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Member Group: Members Posts: 399 Joined: 28-August 07 From: San Francisco Member No.: 3511 |
Thank you very much, ngunn for bringing that brilliant illustration to light!, I'm eclipsed!
-------------------- 'She drove until the wheels fell off...'
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Apr 1 2011, 02:01 AM
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#863
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Member Group: Members Posts: 131 Joined: 31-May 08 From: San Carlos, California, USA Member No.: 4168 |
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Apr 7 2011, 06:31 PM
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#864
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
For those with access to Science, there are a few Kepler results published in tomorrow's issue:
Kepler Detected Gravity-Mode Period Spacings in a Red Giant Star Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission HD 181068: A Red Giant in a Triply Eclipsing Compact Hierarchical Triple System |
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Apr 7 2011, 09:50 PM
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#865
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
Kepler releases on at least two of the three:
Echoes from depth of Red Giant Triply Eclipsing Triple Star System Edit, make that 3/3: Kepler listens to chorus of stars |
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Apr 11 2011, 03:29 PM
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#866
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
Is there any way that Kepler could detect an asteroid belt (analogous to the one between Mars and Jupiter) around other stars? That may not be directly observable via the transit method, but is there any way of obtaining indirect evidence?
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Apr 11 2011, 04:41 PM
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#867
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Member Group: Members Posts: 293 Joined: 29-August 06 From: Columbia, MD Member No.: 1083 |
Is there any way that Kepler could detect an asteroid belt (analogous to the one between Mars and Jupiter) around other stars? That may not be directly observable via the transit method, but is there any way of obtaining indirect evidence? I don't think so...several studies have looked at whether Kepler could detect moons, rings or trojans of any detected planets, and the answer is more or less "yes given certain conditions" (e.g., very large moon/trojan-to-planet ratio) with either direct imaging or transit-timing variations. If you had an Earth analogue with an asteroid-belt analogue, without doing the math to confirm, I'd wager big money that there's very little variation in Earth's orbit due to asteroids. I'm not sure even Jupiter could be inferred if an alien Kepler was looking at transit timing variations of Earth. Not to mention you'd need a large sample of transits to build up a statistically significant sample, and for an Earth analogue, Kepler probably will only get ~3 transits. |
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Apr 11 2011, 06:18 PM
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#868
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Senior Member Group: Members Posts: 1420 Joined: 26-July 08 Member No.: 4270 |
I'm not sure even Jupiter could be inferred if an alien Kepler was looking at transit timing variations of Earth. Only because of Jupiter's long orbital period. Given a long-enough baseline, the transit timing variations would be detectable, I believe.
-------------------- -- Hungry4info (Sirius_Alpha)
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Apr 11 2011, 06:44 PM
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#869
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Member Group: Members Posts: 293 Joined: 29-August 06 From: Columbia, MD Member No.: 1083 |
Exactly. Over a nominal 3-5 year mission, you couldn't detect variations from Jupiter. I don't know how long you'd exactly need, but it would have to be at least 10-15 years to get 2-3 orbits of Jupiter "observed".
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Apr 11 2011, 07:23 PM
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#870
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
Any earthish planets with an annual occultation would certainly be watched after the mission end. Why does the mission timeframe matter for ferreting out that sort of thing?
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