Asteroid Apophis will skim past Earth in 2029, and a new joint mission plans to watch every change

The European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA) have signed a Memorandum of Cooperation to ...
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NASA is making a powerful new ion engine to send astronauts to Mars

A prototype ion engine that uses lithium vapor as a propellant has aced its first tests, achieving 25 times more power than ...