Here's a video created by astronaut Don Petiit aboard the International Space Station. It's a series of still photos of the Aurora taken from the vantage point of the High Frontier. Notice how thin our envelope of atmosphere is......humbling a little.
Here's the vid
Next Generation Ion Engines Will Be Extremely Powerful
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During the Space Race, scientists in both the United States and the Soviet
Union investigated the concept of ion propulsion. Like many early Space Age
pr...
3 hours ago
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