在 "站内教育年 "期间，NASA宇航员乔·阿卡巴和理查德·阿诺德分享了他们对宇宙的热爱和对教学的热情。 车站的教育年份：http://www.nasa.gov/stemonstation NASA Science：http://science.nasa.gov/ 点击这里查看更多视频：https://alugha.com/NASA
LicenseCreative Commons Attribution
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
