粘在火星环上
Like a drop of dew hanging on a leaf, Tethys appears to be stuck to Saturn’s A and F rings from this perspective in this 2014 image from the Cassini mission. For more than a decade, Cassini shared the wonders of Saturn and its family of icy moons—taking us to astounding worlds where methane rivers run to a methane sea and where jets of ice and gas are ...