If things do not go so well, NASA’s chances for launching Artemis II this month will likely wither away. NASA only has a handful of launch opportunities each month where everything lines up for Artemis II’s flight around the Moon. The first two of this month’s launch dates, February 6 and 7, are no longer an option after NASA ordered the two-day delay in this week’s practice countdown. Here are the three launch opportunities still available this month, each with a two-hour launch window:
February 8 at 11:20 pm EST
February 10 at 12:06 am EST
February 11 at 1:05 am EST
If NASA misses this month’s launch opportunities, the next chance to send Artemis II to the Moon will be March 6. NASA has released this chart showing all available Artemis II launch dates through the end of April.
“Wet dress is the driver to launch. We need to get through wet dress,” Blackwell-Thompson said. “We need to see what lessons that we learn as a result of that, and that will ultimately lay out the path toward launch.”
The fix is in
The Artemis II mission comes more than two years after NASA launched Artemis I, the first unpiloted test flight of the Space Launch System rocket.
It took four tries for NASA to fully load propellants onto the first SLS rocket during a series of Wet Dress Rehearsals (WDRs) in 2022. None of the practice runs were free of problems. The list of technical snags included difficulties supplying gaseous nitrogen to the launch pad, problems keeping liquid oxygen at the proper temperature, and a series of valve and seal failures that led to persistent leaks of hydrogen fuel.
Molecular hydrogen is notoriously difficult to wrangle. It is highly flammable, and the molecule’s fantastically low mass and tiny dimension make it hard to contain. The cryogenic temperature of the liquified form of hydrogen is an additional complication. Liquid hydrogen must be kept at temperatures around minus 423° Fahrenheit (minus 253° Celsius), cold enough to freeze solid any gas it comes in contact with except for helium.
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