Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

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What kind of mission would be best suited to sample the plumes of Saturn's ocean world, Enceladus, to determine if this ...

O n November 16, 1974, the incredible Arecibo radio telescope was used not to receive radio light from the universe but to send out a message to the stars. And 50 years on, the message, the content, ...

The spacecraft are the online giant’s entry into beaming wireless service from space, but the company has much to do before it can compete with SpaceX’s Starlink.