太空站的 "精细运动技能 "实验，研究长期的失重对精细运动技能表现的影响。 更多信息请访问http://science.nasa.gov/。 www.nasa.gov/station http://www.nasa.gov/mission_pages/station/research/experiments/1767.html 点击这里查看更多视频：https://alugha.com/NASA
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
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
