What's Up for April 2011

End of SeaWiFS  
After 13 years of service, researchers are no longer able to communicate with SeaWiFS. This extremely important instrument, which gave scientists data on ocean color, filled in a vital information gap. Subtle changes in ocean color signify various types and quantities of marine phytoplankton (microscopic marine plants), the knowledge of which has both scientific and practical applications.

The Lunar Neutron Counter
How would you find water on the Moon? NASA's Lunar Reconnaissance Orbiter has a unique idea: Count the neutrons coming from the moon! Find out more in this video.

Reasons for the Seasons
Dr. Kelly Fast explains the reason for the seasons on Earth, describes what happens during an equinox, and explains whether or not other planets in our solar system have seasons. NASA Now Minutes are excerpts from a weekly current events program available for classroom use at the NASA Explorer Schools Virtual Campus.

Mixed Signals from Saturn