土星壁纸
by Spitzer image credit: NASA/JPL-Caltech/Univ. of Virginia<br /> Hubble image credit: NASA/ESA/STScI/AURA
NASA Image Library · 公有领域（Public Domain）
关于这张图
This picture highlights a slice of Saturn largest ring. The ring red band was discovered by NASA Spitzer Space Telescope, which detected infrared light, or heat, from the dusty ring material.
