The trails can be straight, or they can curve. Sometimes, two trails run alongside each other. Those two lines running from left to right in the back look like they were made by a car; but they were made by rock tracks.
Photo credit: NASA/GSFC/Maggie McAdam
NASA Goddard Space Flight Center is home to the nation’s largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe.
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Brinens and Things 