View Full Version : Exoplanet count 150+

2005-Feb-11, 05:22 PM
A Flurry of Exoplanet Discoveries (http://skyandtelescope.com/news/article_1460_1.asp)

Discoveries of extrasolar planets are coming so fast and furious that even the planet hunters themselves can barely keep up. The current tally stands at around 150 known planets, though the exact number depends on what objects one chooses to call "planets." This week, astronomers announced several important new findings at a conference in Aspen, Colorado.

2005-Feb-11, 06:24 PM
A Flurry of Exoplanet Discoveries (http://skyandtelescope.com/news/article_1460_1.asp)

Some of it is pretty speculative though:

Marc J. Kuchner (Princeton University) and Sara Seager (Carnegie Institution of Washington) presented theoretical models showing that some exoplanets may consist primarily of carbon compounds. This is in marked contrast to Venus, Earth, and Mars, which are mostly made of silicates (silicon-oxygen compounds). The overall composition of carbon-based planets would resemble carbonaceous chondrite meteorites. High pressures deep underground could produce a jeweler's paradise: a layer of diamond many kilometers thick.

How soon before earth-like planets are found around neighboring stars?


2005-Feb-11, 06:29 PM
How soon before earth-like planets are found around neighboring stars?


Sometime in the next decade or so when the first interferometry capable space telescopes are launched.

There are a couple specific missions in the works, one is actually called the Terrestrial Planet Finder.

Tom Mazanec
2005-Feb-11, 06:44 PM
They will be bigger than Earth, but they will be rocky...and it is scheduled early next year:

2005-Feb-11, 07:10 PM
They will be bigger than Earth, but they will be rocky...and it is scheduled early next year:

Interesting. I'll put a gentleman's bet (even though i'm no gentleman) that once they get it into space, they'll refine their technique to allow the chance to see something Earth-sized. One thing I've seen consistently in these space telescopes, the capability they end up having versus what they promise at launch usually far greater than expected.

2005-Feb-11, 11:07 PM
A fascinating site:


Manchurian Taikonaut
2005-Nov-15, 08:20 AM
Even 'Failed Stars' Can Form Planets

planet found with ELODIE around the F6V star HD 33564

Manchurian Taikonaut
2005-Nov-16, 09:15 AM
NASA's TPF and ESA's Gaia may be able to tell us more, Gaia will provide unprecedented positional and radial velocity measurements with the accuracies needed to produce a stereoscopic and kinematic census of about one billion stars in our Galaxy. Estimates suggest that Gaia will detect between 10 000 and 50 000 planets beyond our Solar System. It will do this by watching out for tiny movements in the star's position. NASA's TPF has a chance of finding Alien worlds. The TPF mission is in development stages, and hopefully will be launched within the next decade. Once operational, this space-based telescope system will revolutionize planet hunting, there are many to be launched in the future like Darwin and TPF but it seems like Corot might be one of the first, yet NASA and the ESA also have many future missions in fact their designs seem to be so similar & that it is thought they maybe soon combine efforts in a joint missions to find twin Earth worlds

Launch window
2006-Mar-02, 08:56 AM
Nearby Exoplanet is Scorching Hot
NASA's Spitzer Space Telescope has uncovered a hot extrasolar planet orbiting a nearby star. Planet HD 189733b orbits its parent star only 63 light-years from Earth, making it the closest extrasolar planet ever detected directly. It moves in an extremely tight orbit - less than 3% of the distance from the Earth to the Sun - completing a tour around its star in just over 2 days. And it's scorching hot, reaching temperatures of 844 Celsius (about 1,551 Fahrenheit) on its surface.

Astrophysics (which NASA sometimes calls "Universe")
Under the proposed FY07 budget, Astrophysics would see a small increase of about $2 million to $1.51 billion and then would begin to decline in FY08, ending in FY11 at about $1.31 billion. The total proposed over FY06-FY10 is about $380 million less than what had been projected in the FY06 budget proposal.
Astrophysics also would defer and may cancel several missions under the FY07 proposal. But in addition to the overall budget, Astrophysics needs to contend with significant cost overruns in a number of its missions, including its top priority, the James Webb Space Telescope (JWST), the follow-on to the Hubble Space Telescope. The FY07 budget also includes money for the servicing mission to the Hubble (excluding the cost of the Shuttle launch itself), which had not been included in the FY06 budget plan. Overall, funding has been provided for the large, long-term priorities like Webb and Hubble, while projects that were to begin development in the next several years, such as the search for extra-solar planets and the study of "dark energy," have been deferred.

Funding TPF and splitting up NASA
thread on commentary

Kullat Nunu
2006-Mar-02, 10:00 AM
This is the second "discovery" (http://www.bautforum.com/showthread.php?t=33372) of HD 189733 b. Still it doesn't beat HD 209458 b, which has been "discovered" at least three times (first the original discovery "transiting extrasolar planet discovered", Hubble detection "Hubble finds extrasolar planet with sodium in its atmosphere", the direct Spitzer detection "Spitzer images new extrasolar planet").