Visualizza la versione completa : Planet Quest
Avete mai visitato il sito della NASA sulla ricerca di pianeti extrasolari?
Ultimamente (me ne sono accorto oggi) hanno aggiunto una fighissima mappa spaziale in 3d... Basta cliccare sul contatore di nuovi pianeti trovati e vi si apre una nuova finestra, tutta in flash ma relativamente leggera. Molto carina!
Non l'avevo mai visto questo..una vera e propria fi :-Xata!!
GiÓ visto da almeno 9-10 mesi
In 9-10 mesi quanti nuovi pianeti hanno scoperto? :P
Veramente una figata!!! ;)
Thor, visiti il sito tu e nello stesso giorno annunciano di aver trovato cinque nuovi pianeti... ;D
Secondo me dovrebbero assumerti alla NASA.
Astronomers announce discovery of 5 new planets
January 31, 2005
PLANET QUEST) -- A team of U.S. astronomers has discovered five gas-giant type planets outside our solar system, bringing to 139 the total number of known planets orbiting stars other than the Sun, according to a paper posted in the online edition of The Astrophysical Journal.
The new planets were detected using the radial velocity method, which infers the presence of an unseen companion because of the back-and-forth movement induced in the host star. This movement is detectable as a periodic red shift and blue shift in the star's spectral lines. (For more about this method, see the article Finding Planets.)
As with all other extrasolar planet discoveries to date, the new planets are not of a type that could support life as we know it. However, they provide further statistical information about the distribution and properties of planetary systems, according to the paper.
The new planets are:
* HD 183263 b, which has a minimum mass more than three times that of Jupiter and takes 634 days to complete an orbit;
* HD 117207 B, which has a minimum mass about twice that of Jupiter and takes 2,627 days to complete an orbit;
* HD 188015 b, which has a minimum mass only slightly greater than Jupiter, is located at a similar distance from its star as the Earth is from the Sun, and takes 456 days to complete an orbit;
* HD 45350 b, which is slightly smaller in mass than Jupiter, and takes 891 days to complete an orbit; and
* HD 99492 b, which has a relatively low minimum of mass, about 36 times that of Earth and takes 17 days to compete an orbit.
The team, led by Geoff Marcy and Paul Butler, based its findings on observations obtained at the W.M. Keck Observatory in Hawaii.
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