SLS
NASA, Space Force resolve SLS flight termination system issue
NASA and the U.S. Space Force have resolved an issue with the flight termination system on the Space Launch System that could have cut short the vehicle’s inaugural launch campaign.
NASA prepares to award SLS launch services contract to Boeing-Northrop joint venture
NASA is preparing to award a contract to a Boeing-Northrop Grumman joint venture for Space Launch System missions that could run through the middle of the next decade.
NASA declares SLS countdown rehearsal complete
NASA managers say they have completed testing of the Space Launch System after a recent countdown rehearsal and are ready to move into preparations for a launch as soon as late August.
NASA encouraged by SLS countdown rehearsal
NASA officials said they met most, but not all, of the objectives in a countdown rehearsal of the Space Launch System, and were still determining if they were ready to move ahead with the vehicle’s first launch.
NASA nearly completes SLS countdown test
NASA came within 20 seconds of completing a full countdown rehearsal of its Space Launch System rocket June 20, although it was not immediately clear if the agency got enough data from the test to be able to proceed with a launch.
Fourth SLS countdown test set for June 20
NASA is gearing up for a fourth attempt to perform a fueling test and practice countdown of its Space Launch System ahead of a launch now no earlier than the latter half of August.
NASA audit reveals massive overruns in SLS mobile launch platform
A new mobile launch platform that Bechtel is building for NASA will cost up to four times as much as originally planned and could push back the first launch of an upgraded version of the Space Launch System to the late 2020s, a NASA audit concluded.
Next SLS countdown rehearsal scheduled for June 19
NASA has tentatively scheduled the next attempt to fuel the Space Launch System and go through a practice countdown for June 19, two weeks after the vehicle returns to the launch pad.
NASA plans early June rollout of SLS for next countdown test
NASA is gearing up to perform another practice countdown of the Space Launch System in mid-June as it completes repairs to the vehicle from previous tests.
NASA planning next SLS countdown rehearsal in June
NASA expects to be ready to perform another countdown rehearsal of the Space Launch System in early June as it pushes back the first launch of the vehicle to at least August.
Schedule effects of SLS rollback still uncertain
NASA managers said a rollback of the Space Launch System from its launch pad after three truncated countdown tests will allow them to address issues both at the pad and with the vehicle, but that it was too early to predict what it would do to the schedule for the vehicle’s first launch.
NASA to roll back SLS for repairs
NASA announced late April 16 it will roll back the Space Launch System from the launch pad for various repairs, further delaying the rocket's long-anticipated first launch.
NASA halts third attempt at SLS practice countdown
NASA cut short a third attempt to load propellants onto the Space Launch System for a countdown rehearsal April 14 after encountering several problems, including a hydrogen leak.
NASA defends decision to proceed with modified SLS countdown test
NASA officials defended their decision to proceed with a modified version of a countdown rehearsal for the Space Launch System that does not involve fueling the rocket’s upper stage, saying they’ll wait until after the test to determine the next steps toward launch.
NASA to delay, modify SLS countdown rehearsal
After discovering a problem with a valve on the Space Launch System’s upper stage, NASA is delaying a countdown rehearsal and fueling test and modifying it to limit fueling of the upper stage.
SLS countdown test on hold after second scrub
After a series of problems scrubbed a second countdown rehearsal for the Space Launch System April 4, NASA will wait until after the launch of a SpaceX mission to the space station before trying again.
NASA scrubs first attempt at SLS countdown rehearsal
NASA called off the first attempt to fuel its Space Launch System rocket and go through a practice countdown April 3, citing a problem with the rocket’s mobile launcher, but hopes to try again April 4.
NASA ready for high-stakes, low-profile SLS test
NASA says it’s ready to go ahead with a practice countdown of the Space Launch System that will serve as a final key test before the rocket’s first launch, but one that will also take place largely out of public view.
