spacetoday.net: space news from around the web

ExoLance
Astronomers identify five potential planets orbiting Tau Ceti
Posted: Fri, Dec 21, 2012, 10:33 AM ET (1533 GMT)
Tau Ceti exoplanets illustration (J. Pinfield/RoPACS) Astronomers announced this week the discovery of up to five extrasolar planets orbiting the nearby star Tau Ceti, including one that is potentially habitable. Astronomers identified the five planets in radial velocity observations of the star taken at the European Southern Observatory in Chile as well as at the Anglo-Australian Telescope in Australia and the Keck Observatory in Hawaii. The five planets have orbital periods ranging from 14 to 640 days and masses of 2 to 6.6 times that of the Earth. One planet, with a minimum mass of 4.3 times the Earth and a period of 168 days, lies in the star's habitable zone; some argue the the outermost planet may also be habitable. Tau Ceti is a Sun-like star about 12 light-years from the Earth. Some astronomers are skeptical of the finding, noting that the periodic shifts seen in spectral features could be explained by stellar activity or may be noise.
<<previous article   next article>>
news in brief
NASA selects Boeing and SpaceX for commercial crew contracts
Posted: Tue, Sep 16 9:32 PM ET (0132 GMT)

NASA report criticizes management of NEO program office
Posted: Tue, Sep 16 9:16 PM ET (0116 GMT)

ESA picks comet landing site
Posted: Tue, Sep 16 7:29 AM ET (1129 GMT)

news links
Tuesday, September 16
Five takeaways from NASA’s commercial crew decision
Houston Chronicle — 8:08 pm ET (0008 GMT)
3 Things to Know About NASA’s New Private Space Contracts
Popular Mechanics — 8:06 pm ET (0006 GMT)
NASA awards space contracts to Boeing and SpaceX
Washington Post — 8:05 pm ET (0005 GMT)
Yeast, the final frontier
Univ. of British Columbia — 8:04 pm ET (0004 GMT)
NASA taps SpaceX, Boeing for ISS taxis
Waco (TX) Tribune-Herald — 8:02 pm ET (0002 GMT)


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