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

This spacecraft is quite remarkable, having recently completed a deep space stellar navigation test. You might wonder, what ...

Over the 25 years I’ve written this column, I’ve often marveled at the mind-boggling distances to many celestial objects. Astronomers don’t often use miles to express stellar and galactic distances ...

Today, let's talk about New Horizons. This spacecraft is truly impressive, having recently completed a deep space star ...