单击此处查看更多视频：https://alugha.com/NASA AMS-02正在帮助科学家从其在空间站上的位置研究许多基本物理问题。 宇航员正在进行一系列太空行走，以进行维修并延长天文台的寿命。 空间站研究：www.nasa.gov/iss-science NASA Science: http：//science.nasa.gov/
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
