Fw: Latest News from the Astrobiology Magazine

[LARRY KLAES]

----- Original Message ----- From: Astrobiology Magazine To: [EMAIL PROTECTED] Sent: Monday, December 06, 2004 5:34 AM Subject: Latest News from the Astrobiology Magazine The Martian Methane Surprise http://www.astrobio.net/news/article1332.html Is the methane on Mars coming from deep underground? Why is the finding a clue in the search for biochemistry elsewhere? Astrobiologist Mike Mumma discusses some possibilities while explaining how to measure methane on another world. Earthlings' Low Signal-to-Noise? http://www.astrobio.net/news/article1331.html Our most efficient attempts to broadcast our planet's existence to another civilization would resemble the thermal radiation emitted by stars. By analogy, more advanced worlds would likely do the same, making our chances of listening in hard to distinguish from hearing stellar noise. Planet Swapping http://www.astrobio.net/news/article1330.html Could a passing star exchange planets with our own Sun? Computer simulations suggest that a glancing blow might contribute far outer planets following star disk collisions. Prometheus Steals Ring http://www.astrobio.net/news/article1329.html The tiny moon, Prometheus, shapes Saturn's outer ring by shepherding icy debris into ridges and gaps as Prometheus orbits the giant planet. The Cassini spacecraft captured images not only showing its gravitational interplay, but also its debris trail in a haunting show of how the rings change today. Monday, December 06 ------------------------ For more astrobiology news, visit http://www.astrobio.net To unsubscribe, send subject UNSUBSCRIBE to [EMAIL PROTECTED]