Discover how astronomers use stellar parallax to navigate spacecraft in deep space without relying on Earth-based beacons.

Let’s try a demonstration that we all enjoyed in elementary school. Close one eye, hold out your thumb at arm’s length, and align it with an object on the other side of the room. Without moving your ...

Countless stars in the Milky Way are being raised and lowered by a gigantic wave. This was discovered using data from the ...