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NASA’s Mars orbiter fleet is getting old – here’s how that could affect future exploration
Currently, about 16,000 satellites are orbiting Earth, providing everything from GPS service and weather reports to phone ...
Today In The Space World on MSN
Mars one-way mission - why returning home may be impossible
The first human mission to Mars may not come with a realistic return ticket. Engineering limits, psychology, ethics, and the Earth-out-of-view effect turn the dream of becoming Martian into a ...
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