Jeff Williams Breaks U.S. Record For Most Days In Space

Cumulative record: 520 days and counting

Jeff Williams

Jeff Willliams

Jeff Williams breaks record for cumulative days in space.NASA

Congratulations are in order. NASA astronaut Jeff Williams just broke the U.S. record for cumulative spaceflight hours, previously set by Scott Kelly.

Five hundred and twenty days is a lot of time to spend away from home, and especially when that time is spent weightless in a tiny metal capsule, orbiting miles above earth in the endless vacuum of space.

Luckily for Williams, he's returning on September 5. Then, he'll have logged 534 cumulative days in space.