Instrumentarium Webba pozwoli też badać obiekty Układu Słonecznego.
Scientists envision using the observatory to monitor the water cycle on Mars, look at weather patterns on Saturn's moon Titan, and hunt for new rings around the giant planets. Comets could be tracked, and the water and gases they release during their journeys could be mapped. Ices and minerals could be identified on the surfaces of moons, asteroids and distant minor planets, helping researchers better understand the evolution of our solar system.
To observe planets and other bright bodies, scientists will be able to reduce the amount of light by reading out smaller portions of the detectors very rapidly or by filtering out all but a few wavelengths of light. For moving targets, the entire telescope will move, using non-linear tracking to follow objects along curved paths - a more realistic motion that yields better accuracy.
The authors estimate that from its orbital position, the Webb telescope could have access to observe nearly three-fourths of the near-Earth object population each year. Nearly all asteroids and comets beyond Mars could be observed, as well as all but the three innermost planets - Mercury, Venus and Earth. The observatory also will be able to see minor planets and other objects beyond Neptune - and even watch them cross in front of nearby stars.
Global studies will be possible, because the Webb telescope will be able to image the entire disk (or face) of many planets, moons and small objects with high resolution. This will help scientists map water, carbon dioxide, methane and other gases, to see how the atmospheres of planets (or moons) change from season to season or when night falls - and to detect sudden plumes of gases that might warrant further investigation. Some investigations could even be detailed enough to look at emissions from individual volcanoes on Jupiter's moon Io
http://www.spacedaily.com/reports/Studying_the_Solar_System_with_NASAs_Webb_Telescope_999.html