Skip to main content

NASA’s Artemis I launch postponed following fuel leak issue

Following two failed launch attempts of its new Space Launch System rocket, NASA has announced it will not be making another launch attempt in the next few days. The launch, which was to kick off the Artemis I mission, was originally scheduled for Monday, August 29, but this attempt was scrubbed due to an issue with one of the rocket’s engines. A second attempt was made yesterday, Saturday, September 3, but this launch was also scrubbed due to a liquid hydrogen leak. The launch window for this period does extend until Tuesday, September 6, but NASA has ruled out making another launch attempt during this time.

“We’re not going to launch until it’s right,” said NASA director Bill Nelson in a press conference following yesterday’s scrubbed launch.

The problem was a leaking quick disconnect attached to the rocket’s core stage, through which liquid hydrogen fuel is loaded. The liquid hydrogen tank was filled up to over 10% of its capacity, but several attempts to fix the leak weren’t successful and the decision was made to scrub the launch.

A NASA update suggested that human error could have contributed to the problem. “While in an early phase of hydrogen loading operations called chilldown, when launch controllers cool down the lines and propulsion system prior to flowing super cold liquid hydrogen into the rocket’s tank at minus 423 degrees F, an inadvertent command was sent that temporarily raised the pressure in the system,” NASA wrote. “While the rocket remained safe and it is too early to tell whether the bump in pressurization contributed to the cause of the leaky seal, engineers are examining the issue.”

At a briefing, NASA Artemis mission manager Mike Sarafin emphasized that the rocket hardware was safe, but that the leak was a significant one. He said that a launch in the next few days of the launch window was “definitely off the table” and that a launch attempt within the next two launch windows was possible but would depend on the findings of the teams examining the issues from this attempt.

The next launch windows, which are dependent on the relative movements of Earth and the moon, are in late September to early October, and in the later half of October. However, a further complication is a potential conflict with the launch of the SpaceX Crew-5 mission to the International Space Station, scheduled for October 3.

Editors' Recommendations

Georgina Torbet
Georgina is the Digital Trends space writer, covering human space exploration, planetary science, and cosmology. She…
NASA gives Starliner’s first crewed launch the go-ahead
NASA’s Boeing Crew Flight Test Astronauts Butch Wilmore and Suni Williams prepare for their mission in the company’s Starliner spacecraft simulator at the agency’s Johnson Space Center in Houston.

NASA has completed its readiness review of the Boeing Starliner, a new spacecraft designed to carry astronauts from Earth to the International Space Station (ISS) and back. With the first crewed test flight of the Starliner less than two weeks away, NASA has given the go-ahead for the launch. If successful, the Starliner will join the SpaceX Crew Dragon as the first American spacecraft to carry astronauts since the Space Shuttle.

Astronauts Butch Wilmore and Suni Williams arrived at NASA's Kennedy Space Center in Florida today, Thursday April 25, in time to prepare for the first launch of the Starliner in around a week-and-a-half. Arriving in a T-38 jet, Wilmore and Williams said they were excited to be in Florida and for the launch date to arrive.

Read more
Junk from the ISS fell on a house in the U.S., NASA confirms
The International Space Station.

A regular stanchion (left) and the one recovered from the NASA flight support equipment used to mount International Space Station batteries on a cargo pallet. The recovered stanchion survived reentry through Earth’s atmosphere on March 8, 2024, and impacted a home in Florida. NASA

When Alejandro Otero’s son called him on March 8 to say that something had crashed through the roof of their home, he initially thought it might have been a meteorite.

Read more
Watch NASA begin testing its Orion capsule for lunar flyby
NASA starts testing the Orion capsule for the Artemis II mission.

NASA has started testing the Orion spacecraft that will take four astronauts on a voyage around the moon as part of the Artemis II mission currently scheduled for 2025.

The space agency shared a video (below) showing the Orion capsule being transported to an upgraded vacuum chamber inside the Operations and Checkout Building at NASA’s Kennedy Space Center in Florida. There, it will undergo electromagnetic compatibility and interference testing.

Read more