ScienceCast : 在世界中心的世界

天文学家用NASA的哈勃太空望远镜发现了一个巨大的氢云,从一个叫格利泽436b的星球上蒸发出来的。由于母星的极端辐射,这颗行星的大气层正在蒸发中。 欲了解更多信息,请访问。 点击这里查看更多视频:

LicenseCreative Commons Attribution

More videos by this producer

NASA ScienceCasts: A Sunset Sky Show

Click here to see more videos: Visit for more. On the evening of March 18 (2018), step outside for a view of the crescent Moon, Venus, and Mercury together above the twilight horizon.

NASA ScienceCasts: Eye on Neptune

Click here to see more videos: Neptune will be at opposition in September, providing sky watchers and astronomers the opportunity to observe this planet that is invisible to the naked eye, but that scientists would love to see more clearly. NASA Science: http://science.nasa

NASA ScienceCasts: You Light Up Our Night

Click here to see more videos: Visit for more. People around the world have the opportunity to participate in the study of comet 46P/Wirtanen as it has a close approach with Earth in December of 2018.