ScienceCcast:惊人的卫星

太空时代开始时,研究员渴望探索太阳系的行星。多年过去,宇航员发现,太阳系中的卫星或许更有趣。 访问 http://science.nasa.gov/ 了解更多信息。 点击这里查看更多视频:https://alugha.com/NASA

LicenseCreative Commons Attribution-ShareAlike

More videos by this producer

ScienceCasts: Escape of the Destructive Electrons

Visit http://science.nasa.gov/ for more. Earth is surrounded by electrons that can be disruptive to our technology. NASA is using high-altitude balloons and spacecraft to monitor and understand these particles in the radiation belts surrounding our planet. Click here to see more videos: https://al

NASA ScienceCasts: A Sunset Sky Show

Click here to see more videos: https://alugha.com/NASA Visit http://science.nasa.gov/ 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.

Measuring Distance in the Solar System | NASA Planetary Sciences

Explore how astronomers and scientists use astronomical units to measure distances in the solar system in this video adapted from NASA. The astronomical unit (au) -- equal to the average distance from Earth to the Sun -- is a convenient unit of measure when talking about distances in the solar syste