Could 'Oumuamua be an extraterrestrial solar sail?

On October 19th, 2017, the Panoramic Survey Telescope and Rapid Response System-1 (Pan-STARRS-1) in Hawaii announced the first-ever detection of an interstellar asteroid, named 1I/2017 U1 (aka, "Oumuamua). In the months that ...

What does empty space sound like? We need your help to find out

We know that there is sound on planets and moons in the solar system – places where there's a medium through which sound waves can be transmitted, such as an atmosphere or an ocean. But what about empty space? You may have ...

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