If an antimatter meteor came into our solar system, we’d definitely know about it, says one reader, especially if it hit the ...

Researchers now believe that Planet Nine — the large, distant, and still-hypothetical planet at the edge of our solar system — could be responsible for the Sun’s unusual tilt. All of the planets in ...

We all have that one friend who think they're a whizz when it comes to all things space. They have astronomical knowledge about the cosmos and beyond. They can name all the planets in the solar system ...