The orbital period of an asteroid provides clues to the shortest path to the Red Planet.
A new study suggests early orbital data from asteroid 2001 CA21 could guide mission routes that slash Earth–Mars–Earth travel times to as little as 153 days. Researcher Marcelo de Oliveira Souza found ...
Whether it's robotic rovers heading to Mars or, one day, a crew of astronauts, a round-trip journey is an incredibly long one ...
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