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


Scientist explain methane in Titan's atmosphere
Posted: Thu, Mar 2, 2006, 8:09 AM ET (1309 GMT)
Titan haze layers seen by Cassini (NASA/JPL) The methane detected in Titan's dense atmosphere was generated by three distinct outgassing episodes, scientists have concluded. In a paper published in the March 2 issue of the journal Nature, a group of planetary scientists in Arizona and France described their model to explain why Titan's atmosphere contains methane, a gas that breaks down in sunlight after tens of millions of years and thus must be continually replenished. Their models indicates there have been three times in the moon's history when the planet has released methane into the atmosphere: in the first billion years after its formation; two billion years ago, when its silicate core began to convect; and again starting 500 million years ago, when its icy crust began to convect and cool. This last episode, which is still in progress, will end in a few hundred million years, with no further episodes of methane outgassing before the sun enters its red giant phase and heats up the moon.
<<previous article   next article>>
news in brief
Russia launches astronomy satellite
Posted: Sun, Jul 14 4:18 PM ET (2018 GMT)

Vega launch of UAE satellite fails
Posted: Sun, Jul 14 4:17 PM ET (2017 GMT)

NASA reassigns leadership of exploration programs
Posted: Sun, Jul 14 4:16 PM ET (2016 GMT)

news links
Tuesday, July 16
Galileo sat-nav system still without service
BBC — 7:21 am ET (1121 GMT)
Europe's GPS system stops working
The Independent — 7:20 am ET (1120 GMT)
Galileo’s initial services rocky patch continues
GPS World — 7:19 am ET (1119 GMT)


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