drumbo
09-05-06, 01:44 PM
http://antwrp.gsfc.nasa.gov/apod/image/0609/dione_cassini.jpg (http://antwrp.gsfc.nasa.gov/apod/image/0609/dione_cassini_big.jpg) Bright Cliffs Across Saturn's Moon Dione
Credit: Cassini Imaging Team (http://ciclops.org/), SSI (http://www.spacescience.org/), JPL (http://www.jpl.nasa.gov/), ESA (http://www.esa.int/), NASA (http://www.nasa.gov/)
Explanation: What causes the bright streaks on Dione? Recent images of this unusual moon by the robot Cassini spacecraft (http://saturn.jpl.nasa.gov/overview/mission.cfm) now orbiting Saturn (http://www.nineplanets.org/saturn.html) are helping to crack the mystery. Close inspection of Dione's trailing hemisphere, pictured above (http://photojournal.jpl.nasa.gov/catalog/PIA08256), indicates that the white wisps are composed of deep ice cliffs (http://antwrp.gsfc.nasa.gov/apod/ap051026.html) dropping hundreds of meters. The cliffs may indicate that Dione has undergone some sort of tectonic surface (http://www.seismo.unr.edu/ftp/pub/louie/class/100/plate-tectonics.html) displacements in its past. The bright ice-cliffs run across some of Dione (http://en.wikipedia.org/wiki/Dione_%28moon%29)'s many craters, indicating that the process (http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1984Icar...59..205M) that created them occurred later than the impacts (http://antwrp.gsfc.nasa.gov/apod/ap010428.html) that created those craters. Dione (http://www.nineplanets.org/dione.html) is made of mostly water ice but its relatively high density indicates that it contains much rock (http://en.wikipedia.org/wiki/Rock_and_roll) inside. Giovanni Cassini (http://www.seds.org/messier/xtra/Bios/cassini.html) discovered Dione in 1684. The above image (http://photojournal.jpl.nasa.gov/catalog/PIA08256) was taken at the end of July from a distance of about 263,000 kilometers. Other high resolution image (http://antwrp.gsfc.nasa.gov/apod/ap951009.html)s of Dione were taken by the passing Voyager spacecraft (http://nssdc.gsfc.nasa.gov/planetary/voyager.html) in 1980.
Source (http://antwrp.gsfc.nasa.gov/apod/ap060905.html)
Credit: Cassini Imaging Team (http://ciclops.org/), SSI (http://www.spacescience.org/), JPL (http://www.jpl.nasa.gov/), ESA (http://www.esa.int/), NASA (http://www.nasa.gov/)
Explanation: What causes the bright streaks on Dione? Recent images of this unusual moon by the robot Cassini spacecraft (http://saturn.jpl.nasa.gov/overview/mission.cfm) now orbiting Saturn (http://www.nineplanets.org/saturn.html) are helping to crack the mystery. Close inspection of Dione's trailing hemisphere, pictured above (http://photojournal.jpl.nasa.gov/catalog/PIA08256), indicates that the white wisps are composed of deep ice cliffs (http://antwrp.gsfc.nasa.gov/apod/ap051026.html) dropping hundreds of meters. The cliffs may indicate that Dione has undergone some sort of tectonic surface (http://www.seismo.unr.edu/ftp/pub/louie/class/100/plate-tectonics.html) displacements in its past. The bright ice-cliffs run across some of Dione (http://en.wikipedia.org/wiki/Dione_%28moon%29)'s many craters, indicating that the process (http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1984Icar...59..205M) that created them occurred later than the impacts (http://antwrp.gsfc.nasa.gov/apod/ap010428.html) that created those craters. Dione (http://www.nineplanets.org/dione.html) is made of mostly water ice but its relatively high density indicates that it contains much rock (http://en.wikipedia.org/wiki/Rock_and_roll) inside. Giovanni Cassini (http://www.seds.org/messier/xtra/Bios/cassini.html) discovered Dione in 1684. The above image (http://photojournal.jpl.nasa.gov/catalog/PIA08256) was taken at the end of July from a distance of about 263,000 kilometers. Other high resolution image (http://antwrp.gsfc.nasa.gov/apod/ap951009.html)s of Dione were taken by the passing Voyager spacecraft (http://nssdc.gsfc.nasa.gov/planetary/voyager.html) in 1980.
Source (http://antwrp.gsfc.nasa.gov/apod/ap060905.html)