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


Astronomers discover 100th exoplanet
Posted: Wed, Sep 18, 2002, 7:46 AM ET (1146 GMT)
Extrasolar planet illustration (David Hardy) Astronomers announced Tuesday that they have discovered what they believe is the 100th extrasolar planet. The planet, 1.2 times the mass of Jupiter, has a near circular orbit 2.5 AU (375 million km) from the star Tau 1 Gruis. The planet is one of the first Jupiter analogs — planets with masses and orbits similar to Jupiter — discovered. Astronomers announcing the discovery said it was the 100th exoplanet found since the first exoplanet around a Sunlike star was found seven years ago, although the exact number of exoplanets varies from survey to survey. The number of exoplanets found is now allowing scientists to calculate statistics on the types of solar systems, and the fraction of stars with planets: about 12 percent have planets within 5 AU, according to planet hunters Geoff Marcy and Paul Butler.
<<previous article   next article>>
news in brief
Final Delta 2 launches ICESat-2
Posted: Sun, Sep 16 10:41 AM ET (1441 GMT)

Japanese ISS cargo mission launch scrubbed
Posted: Sun, Sep 16 10:40 AM ET (1440 GMT)

SpaceX to announce new plans for circumlunar trip
Posted: Sun, Sep 16 10:39 AM ET (1439 GMT)

news links
Monday, September 24
Kuwaiti youth eager to put country on space exploration map
Kuwait News Agency — 5:25 am ET (0925 GMT)
Opinion: Time to stop throwing good money after longshot aerospace investments
Midland (TX) Reporter-Telegram — 5:21 am ET (0921 GMT)
Japan's hopping space rovers land on asteroid
Sky News — 5:19 am ET (0919 GMT)


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