(NEW YORK) — Two NASA astronauts completed an hours-long spacewalk on Thursday morning that was earlier postponed due to a risk of space debris.

Astronauts Thomas Marshburn and Kayla Barron left the hatch at 6:15 a.m. EST and successfully conducted a spacewalk that lasted 6 hours and 32 minutes to replace a faulty antenna.

The spacewalk was scheduled for Tuesday morning but was delayed hours before the stipulated start time after NASA got a “debris notification.”

The source of the debris has not been confirmed yet.

Speaking of space junk. The International Space Station is swerving to avoid space junk. The head of Russia’s Roscosmos space agency says the ISS had to swerve away today to avoid hitting a fragment of a U.S. launch vehicle that’s been in orbit since 1994. The space agency says the ISS dropped about 400 yards for nearly three minutes to avoid the collision. Earlier this week, debris orbiting the Earth forced NASA to postpone a spacewalk outside the ISS.

Also, SpaceX is closer to its goal of spreading broadband internet around the world. The company launched a Falcon 9 rocket Thursday night carrying 48 more Starlink satellites into low-Earth orbit. Liftoff took place from Cape Canaveral Space Force Station. Two hours after launch, SpaceX confirmed the satellites were deployed.

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