Artemis

A second attempt at launching the uncrewed Artemis I mission was scrubbed Saturday after experiencing fueling issues. Future launch attempts may not occur ...

The launch controllers warmed up the line in an attempt to get a tight seal and the flow of liquid hydrogen resumed before a leak reoccurred. To prevent the engines from experiencing any temperature shocks, launch controllers gradually increase the pressure of the core stage liquid hydrogen tank in the hours before launch to send a small amount of liquid hydrogen to the engines. , which will capture a stream of Commander Moonikin Campos sitting in the commander's seat. In the last few days, the launch team has taken time to address issues, like hydrogen leaks, that cropped up ahead of Monday's planned launch before it was scrubbed. are also riding in a ring on the rocket. The first launch attempt, on Monday, was called off after several issues arose, including with a system meant to cool the rocket's engines ahead of liftoff and various leaks that sprung up as the rocket was being fueled. Nelson said that the issues during the first two scrubs have not caused any delays to future Artemis program missions. The team believes an overpressurization event might have damaged the soft seal on the liquid hydrogen connection, but they will need to take a closer look. The engines need to be thermally conditioned before super-cold propellant flows through them prior to liftoff. Artemis I had been slated to take off Saturday afternoon, but those plans were scrubbed after team members discovered a liquid hydrogen leak that they spent the better part of the morning trying to resolve. The liquid hydrogen leak was detected Saturday at 7:15 a.m. I look at this as part of our space program, in which safety is the top of the list."

For the second time in five days, NASA halts a countdown in progress and postpones a planned attempt to launch the debut test flight of its giant, ...

SLS has been under development for more than a decade, with years of delays and cost overruns. Many experts, however, believe that time frame is likely to slip by a few years. But NASA officials have yet to make that call.

The flight termination system is required on all rockets to protect public safety. During today's launch attempt, engineers saw a leak in a cavity between the ...

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. During today’s launch attempt, engineers saw a leak in a cavity between the ground side and rocket side plates surrounding an 8-inch line used to fill and drain liquid hydrogen from the SLS rocket. 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.

Seen from the flame trench at Launch Pad 39B, NASA's Space Launch System rocket and Orion spacecraft are atop the mobile launcher at the agency's Kennedy Space ...

It's important to note the operating system is efficient enough not to require tons of compute power, but still. NASA has only planned (and budgeted) for this single test flight before putting humans on the next flight of SLS, expected in 2024. What's worse, the expected cost per launch of SLS is looking to be about eight times what was initially expected. Everything that NASA learns from Artemis is meant to then inform plans for the first missions to Mars in the 2030s. This first test flight will send an uncrewed Orion capsule around the moon and test some technology along the way before coming in for a blistering hot reentry through Earth's atmosphere and a splashdown landing. The SLS used for

During tanking operations, teams will fuel the Space Launch System (SLS) rocket with liquid oxygen (LOX) and liquid hydrogen (LH2), beginning with the rocket's ...

[the propellant lines](https://www.nasa.gov/feature/going-with-the-flow-egs-team-tests-flow-of-cryogenic-fluids) to load the rocket’s core stage LOX in preparation for tanking. The process involves slowly filling the core stage with propellant to thermally condition the tank until temperature and pressure are stable before beginning fast fill operations, which is when the tank is filled at a quicker pump speed. Tanking begins with chilling down the LOX lines for the core stage. In sequential fashion, LOX and LH2 will flow into the rocket’s core stage tank and be topped off and replenished as some of the cryogenic propellant boils off. 3, with conditions improving to 80% favorable toward the later part of the window. Weather conditions remain 60% favorable at the beginning of the two-hour launch window which opens at 2:17 p.m.

NASA's next-generation Space Launch System likely won't fly before the end of September.

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