标题: 螺旋星云（Helix Nebula） [打印本页] 作者: 跨越地平线 时间: 2007-2-17 14:24 标题: 螺旋星云（Helix Nebula） This infrared image from NASA's Spitzer Space Telescope shows the Helix nebula, a cosmic starlet often photographed by amateur astronomers for its vivid colors and eerie resemblance to a giant eye.
The nebula, located about 700 light-years away in the constellation Aquarius, belongs to a class of objects called planetary nebulae. Discovered in the 18th century, these colorful beauties were named for their resemblance to gas-giant planets like Jupiter.
