spacetoday.net: space news from around the webin association with SpaceNews


Astronomers discover youngest exoplanet
Posted: Thu, Jan 3, 2008, 7:47 AM ET (1247 GMT)
TW Hydrae exoplanet illustration (MPIA) German astronomers reported this week that they have discovered the youngest extrasolar planet found to date, a world that is still embedded within the protoplanetary disk around its star. Astronomers detected the presence of the exoplanet surrounding the star TW Hydrae indirectly, using the radial velocity technique used to find most of the over 250 known exoplanets. The star itself is estimated to be only 8-10 million years old, and is still surrounded by a protoplanetary disk of dust and gas. The planet, about 10 times the mass of Jupiter, orbits in an inner gap in the disk, completing one orbit in just over 3.5 days. The discovery puts new constraints on how long it takes for planets to form around new stars.
<<previous article   next article>>
news in brief
news links
Tuesday, May 24
Iridium launches alternative GPS PNT service
GPS World — 6:03 am ET (1003 GMT)
SpaceX set to launch Falcon 9 rocket Thursday
Florida Politics — 5:49 am ET (0949 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list