The European Space Agency’s Gaia telescope has a five-year mission: to catalog and monitor a billion stars in the Milky Way galaxy. The unprecedented survey will reveal properties of each star, ...

Astronomy is often called the oldest branch of science. Since ancient times, humans have stared at the sky, cataloged its residents, marked new arrivals, and charted the constant stars and wandering ...

"We will never forget Gaia, and Gaia will never forget us." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Europe's star-mapping Gaia space ...