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 ...

Exit strategy Artist’s impression of New Horizons as it flew past Pluto in 2015. (Courtesy: Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute) NASA’s New Horizons ...

Gaia, through parallax measurement and other readings, gives the closest look at the Milky Way Galaxy to date.