Learn about the Voyager 2 mission to Neptune in this video from NASA. Voyager 2 reached Neptune in 1989, 12 years after launch, and the flyby was the first and only time a spacecraft has visited Neptune. The planet appears blue because of the methane in its atmosphere. Voyager 2 discovered at least four rings, six moons, and interesting weather on Neptune, such as the Great Dark Spot (believed to be a hurricane the size of Earth). The spacecraft also captured images of Triton, Neptune's largest moon. See the background essay for updated information about Neptune and missions to the outer planets. This video is available in both English and Spanish audio, along with corresponding closed captions. This resource is part of the NASA Planetary Sciences Collection. CREDITS: https://www.pbslearningmedia.org/credits/npls13.sci.ess.eiu.neptune/ License: https://www.pbslearningmedia.org/help/full-license-for-section-3c-of-terms-of-use-download-and-share/
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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
