Kepler Mission |
Kepler Mission |
Sep 22 2011, 02:16 PM
Post
#961
|
|
Member Group: Members Posts: 293 Joined: 29-August 06 From: Columbia, MD Member No.: 1083 |
http://www.spaceref.com/news/viewsr.html?pid=38486
Two new planets found by the public in the Kepler data archive from the first 90 days of data. Both are hot super-Earths/sub-Neptunes. |
|
|
Sep 22 2011, 04:28 PM
Post
#962
|
|
Senior Member Group: Members Posts: 1417 Joined: 26-July 08 Member No.: 4270 |
Both are hot super-Earths/sub-Neptunes. Not with those radii! -------------------- -- Hungry4info (Sirius_Alpha)
|
|
|
Sep 22 2011, 05:45 PM
Post
#963
|
|
Member Group: Members Posts: 293 Joined: 29-August 06 From: Columbia, MD Member No.: 1083 |
The one is 2.65 R-earth, so that's less than Neptune. The other, you're right, is 8 R-earth, which is about twice Neptune's.
Thanks for the correction. |
|
|
Sep 28 2011, 02:45 AM
Post
#964
|
|
Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
|
|
|
Sep 28 2011, 11:24 AM
Post
#965
|
|
Senior Member Group: Members Posts: 1417 Joined: 26-July 08 Member No.: 4270 |
That seems reasonable. Hot Jupiters aren't expected around either component of a two-star system with low separations. Some counterexamples like Gliese 86 have one component being a post-RGB star, and can be understood by considering the evolution of the system.
-------------------- -- Hungry4info (Sirius_Alpha)
|
|
|
Sep 29 2011, 05:27 PM
Post
#966
|
|
Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
I guess the reasoning is that hot Jupiters form outside the ice line before they migrate in, and, clearly, that can't happen with a system like Alpha Centauri. What's not clear to me, though, is whether something unusually big could form inside the safe zone during the period when all that matter from outside the safe zone is still whizzing around. (Safe is a function of semi-major axis and ellipticity, so lots of stuff in unstable orbits would invade the space that's safe for circular ones.)
But I guess I do know which way to bet. ;-) --Greg |
|
|
Oct 5 2011, 12:58 PM
Post
#967
|
|
Junior Member Group: Members Posts: 53 Joined: 1-February 10 Member No.: 5210 |
Kepler-18b, 18c, and 18d have been announced. They are a super-earth class planet and two Neptune class planets in close orbit around a sun-sized star. Kepler-18c and 18d are in a slightly out of phase 2:1 orbital resonance. Kepler-18b is described as being "validated" rather than "verified," since its existence has been confirmed by a probability argument based on the absence of apparent background objects in a high resolution image obtained with the Palomar 5-meter telescope. If we set the bar at validation, the discovery process for smaller planets should go considerably more quickly.
|
|
|
Nov 2 2011, 11:58 AM
Post
#968
|
|
Junior Member Group: Members Posts: 53 Joined: 1-February 10 Member No.: 5210 |
There is finally a new mission manager update here. The most important points are: (1) "This was the second full quarter in a row with no significant anomalies or unplanned science breaks"; and (2) over 200 abstracts have been accepted for the First Kepler Science Conference at NASA Ames Research Center Dec. 5-9.
More information about the conference is here. The sessions will include:
Lastly, there is an article about progress on the mission extension proposal at Space.com here. |
|
|
Nov 2 2011, 05:00 PM
Post
#969
|
|
Member Group: Members Posts: 128 Joined: 10-December 06 From: Atlanta Member No.: 1472 |
|
|
|
Dec 4 2011, 10:16 PM
Post
#970
|
|
Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
The First Kepler Science Conference
http://kepler.nasa.gov/Science/ForScientis...FTOKEN=16036309 Dates: December 5-9, 2011 NASA will host a news briefing at 8 a.m. PST, Monday, Dec. 5, to announce new discoveries by the Kepler mission. The briefing, during the Kepler Science Conference, will be in building 152 at NASA's Ames Research Center at Moffett Field, Calif. The briefing will provide an update on the statistical findings since Kepler's Feb. 1, 2011, science data release and introduce a new confirmed planetary discovery. The briefing participants are: -- Pete Worden, center director, Ames Research Center -- Natalie Batalha, Kepler deputy science team lead at Ames -- Bill Borucki, Kepler principal investigator at Ames -- Jill Tarter, director of the Center for SETI Research, SETI Institute, Mountain View, Calif. http://www.spaceref.com/news/viewpr.html?pid=35415 A live stream of the Kepler Science Conference will be available at: http://connect.arc.nasa.gov/kepler PDF of the conference sessions with complete abstracts http://kepler.nasa.gov/files/mws/keplercon...21Nov_print.pdf We are in an era of a star trek but without the starships.... for now we chart courses for the starships, unmanned or crewed, of the future. Craig |
|
|
Dec 5 2011, 12:50 AM
Post
#971
|
|
Senior Member Group: Members Posts: 2079 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Will that be the only streaming link? It's not on the NASA TV schedule....
|
|
|
Dec 5 2011, 12:18 PM
Post
#972
|
|
Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Only link I know of is the one for the arc stream I checked the NASA schedule too and did not see it. Still going to check around NASA TV at 8:00 PST (11:00am EST). Their schedule listing is not always accurate. |
|
|
Dec 5 2011, 07:40 PM
Post
#973
|
|
Senior Member Group: Members Posts: 2079 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Here we go:
http://www.nasa.gov/mission_pages/kepler/n...n-briefing.html Summary by Bad Astronomer: http://blogs.discovermagazine.com/badastro...-sun-like-star/ And the predictable headlines: http://news.google.ca/news/story?q=kepler+...ved=0CDMQqgIwAA |
|
|
Dec 5 2011, 10:53 PM
Post
#974
|
|
Member Group: Members Posts: 723 Joined: 13-June 04 Member No.: 82 |
The Habitable Exoplanets Catalog
MOD EDIT: One thing missing here is the word "potentially" just before "habitable"; let's please keep that firmly in mind for this discussion. 2 Confirmed Habitable Exoplanets 14 Candidate Habitable Exoplanets 28 Confirmed Habitable Exomoons 6 Candidate Habitable Exomoons Exomoons are inferred from planetary dynamics, but none observed yet. (Mongo: I assume that they have been detected via transit timing variations) Update: The recent confirmation of Kepler 22b (KOI-087) does not qualify as a potential habitable exoplanet on the catalog. It is in the habitable zone of the star but it is also too big and classified here as a Warm Neptunian. Most of the interesting exoplanets in our catalog are Kepler objects too just waiting for confirmation as Kepler 22b did today. |
|
|
Dec 6 2011, 12:18 AM
Post
#975
|
|
Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Marcy presentation RV Follow-Up of Small Planets from Kepler: Verification, Masses, and Densities ... Marcy states the limiting radius for a rocky world (something you can walk on and not be underwater or wading through a deep extended H2 atmospere) is 2.5 Earth radii. Wonder how much pressure at the surface of one of these H2 extended atmos planets one would feel at the rocky surface. Or are all H2 extended worlds all so volatile rich, a global ocean will always be present?
New worlds!!!! wow |
|
|
Lo-Fi Version | Time is now: 19th April 2024 - 02:19 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |