Comet ISON could well be the brightest and most spectacular comet for a generation. It should appear above the eastern horizon from December 2013 as a glorious streak across the sky. ISON has been travelling towards the sun for ten thousand years and will make only one orbit through its corona before disappearing off into the outer solar system. But as well as providing a great...
片源选择
可以左右滑动哦
选集播放
留言评论
猜你喜欢
可以左右滑动哦