Text Version
RSS Feeds
Home Forum Photos Features Newsletter Archive Employment
About US Help Site Map
SEARCH   About US FAQ Site Map Site News
  -Text Version
  -RSS Feeds
  -News Archive
  -Give us feedback
  -Voices of Readers
  -Online community
  -China Biz info
  What's new
Cassini finds possible origin of one of Saturn's rings
+ -
08:02, August 03, 2007

 Related News
 Cassini offers rare look at Saturn's satellite
 NASA finds hydrocarbons on Saturn's moon Hyperion
 Comment  Tell A Friend
 Print Format  Save Article
Data from the Cassini spacecraft have provided astronomers with a likely source of Saturn's mysterious G ring, which was discovered by Voyager probe.

The new findings by an international team of astronomers is published in the Aug. 2 edition of journal Science.

The G ring is a faint and narrow ring lying beyond the main set of rings and its existence at this location has been a mystery. It is not flanked by moons that might shepherd it and carve it out or infuse it with vapor. The G ring is more than 15,000 kilometers from the nearest satellite and 168,000 kilometers from the center of Saturn.

Matthew Hedman from Cornell University and his collaborators got a new view of the ring from the Cassini spacecraft and found that it contains a bright arc of material composed of icy bodies ranging in size from centimeters to a meter.

The ring is in a co-rotation with the major moon Mimas. Dust from the bring debris arc trails out into the ring and is stirred by Mimas' gravity.

The finding is evidence of the complex interaction between Saturn's moons, rings and magnetosphere. Studying this interaction is one of Cassini's objectives.

Source: Xinhua

  Your Message:   Most Commented:
Respond "Nanking" with humanity, respect, tears & applause: Interview
Ambassador reviews Germany-China relations
PD Online Forum: Summer peak transportation of rails
CPC full of vigor and vitality
Roadside bomb blast kills 26 people in SW Pakistan

|About Peopledaily.com.cn | Advertise on site | Contact us | Site map | Job offer|
Copyright by People's Daily Online, All Rights Reserved