NASA Sends Tiny Atomic Clock to Space

July 01, 2019

Traveling through space isn’t just about knowing where you are. You also need to know what time it is, and a wristwatch won’t do. Spacecraft rely on extremely accurate measurements of time to coordinate maneuvers, and these systems will become even more important as we aim for distant destinations. That’s why NASA is testing a new type of mercury-ion atomic clock, which is smaller and more versatile.