Spitzer's infrared vision

By using Spitzer Space Telescope, their measured the size of an asteroid. Astronomers called the asteroid as 2011 MD(found roughly 20feet in size), structure for asteroid contain a lot of empty space. Spitzer's infrared vision helps to sizing up the asteroid.

Michael Momment said "Spitzer can use its heat-sensitive infrared vision to spy asteroids and get better estimates of their sizes". Indicating the object's true size, infrared light is most useful. The size of 2011MD was roughly known, by using visible light it can be observed.

For more information about asteroid 2011MD, visit
http://neo.jpl.nasa.gov
http://www.jpl.nasa.gov/asteroidwatch/

For more information about Spitzer
http://spitzer.caltech.edu
http://www.nasa.gov/spitzer

By Cassini mission - Maps of Saturn’s gravity and magnetic fields.

Input from more than 2000 member's and NASA members, Cassini named as Cassini Grand Finale.It collects valuable information of original planners might never have imagined. It will make detailed maps of Saturn’s gravity and magnetic fields.

 

By this spacecraft we know how the planet is arranged on the inside, and possibly helping to solve the irksome mystery, Its camera will take excellent images of Saturn rings and clouds.

By comparing with other mission, the unique region so close to the planet. This will help to improve our understanding of how giant planets and families of planets everywhere.

For more information about Cassini, visit http://saturn.jpl.nasa.gov/name