The largest moon, Phobos, is indeed seen to be a cratered, asteroid-like object in this stunning color image from the Mars Express spacecraft, recorded at a resolution of about seven meters per pixel.

• 这颗最大的卫星火卫一，在火星快车飞船拍摄的这张彩色清晰影像中看上去的确是一颗表面具有众多陨石坑、外观如同小行星一样的天体，该影像清晰度达到了每帧7米的显示效果。