Astronomers take a closer look at one of Earth’s quasi-satellites

The Moon isn’t the only traveling buddy keeping the Earth company on its journey around the Sun. Occasionally an asteroid will get caught in a gravitational dance with our home for a few years or so, before disappearing into space again. Last year astronomers discovered one of the most stable of these “quasi-satellites”, and now they’ve peered closer to get a better understanding of what it is and where it might have come from.


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