Like thousands of other Huntsvillians last weekend, Rae Ann Meyer, acting director of the Marshall Space Flight Center, was on the edge of her seat as Artemis II rolled out from the Vehicle Assembly Building at the Kennedy Space Center.

But she wasn’t at the Florida site; nor at her office at the Marshall Center.

“I was watching at home on NASA TV,” Meyer said. “It was exciting.”

Meyer was joined by several Marshall officials Wednesday for an update on the Artemis II mission which is the dress rehearsal flight for Artemis III when the United States will land a crew on the moon.

“This will get us back to the lunar surface, reinforcing our position in leadership in space,” she said.

MSFC Acting Director Rae Ann Meyer. Photo courtesy of NASA.

Next week, NASA will hold a prelaunch test, known as a wet dress rehearsal, where teams demonstrate the ability to load more than 700,000 gallons of propellant into the rocket, conduct a launch countdown, and practice safely removing the propellants without astronauts onsite.

The wet dress rehearsal also includes several runs to demonstrate the team’s ability to hold, resume, and recycle several times inside the final 10 minutes of the countdown.

While the launch window opens as early as Feb. 6, the mission management team will assess flight readiness after the wet dress rehearsal before selecting a launch date.

There are several parameters that dictate launch availability periods. Because of the trajectory relative to lunar landing missions, NASA listed the following constraints unique to the Artemis II mission:

The launch day and time must allow SLS to be able to deliver Orion into a high Earth orbit where the crew and ground teams will evaluate the spacecraft’s life support systems before the crew ventures to the Moon.
Orion also must be in the proper alignment with the Earth and Moon at the time of the trans-lunar injection burn. The Artemis II trans-lunar injection burn places Orion on course to fly by the Moon, and also sets it on a free return trajectory, in which the spacecraft uses the Moon’s gravity to send the spacecraft back to Earth without additional major propulsive maneuvers.
The trajectory for a given day must ensure Orion is not in darkness for more than 90 minutes at a time so that the solar array wings can receive and convert sunlight to electricity, and the spacecraft can maintain an optimal temperature range. Mission planners eliminate potential launch dates that would send Orion into extended eclipses during the flight.
The launch date must support a trajectory that allows for the proper entry profile planned during Orion’s return to Earth.

The launch availability periods through April are:

Launch Period: Jan. 31–Feb. 14
Launch opportunities: Feb. 6, 7, 8, 10, and 11

Launch Period: Feb. 28–March 13
Launch opportunities: March 6, 7, 8, 9, and 11

Launch Period: March 27–April 10
Launch opportunities: April 1, 3, 4, 5, and 6

Just a few short months ago, the Marshall-managed SLS program was in the sights of Elon Musk and DOGE. They were slashing and cutting federal programs and were planning to launch into funding at NASA and the Marshall Center.

Now, with Artemis II just days away from launch, excitement has replaced anxiety at the center.

With nearly 20 years of experience at Marshall – including 13 years with the SLS Program Office, Sharon Cobb relates to the excitement.

SLS assistant Program Director Sharon Cobb. Photo courtesy of NASA.

“To see it all come together and see it roll out to the pad,” said Cobb, the SLS associate program manager. “To send humans back to the moon for the first time in 50 years is so exciting.”

Cobb said some of the SLS hardware was built at Marshall with local businesses providing the materials.

“This was very much a community contribution…,” she said. “We’re continuing a tradition of building rockets and sending people to the moon.”

Meanwhile, Meyer is planning to be at the Cape for the launch as she, again, like thousands of other Huntsvillians, is on pins and needles for this historic event.

“There’s nothing like a launch,” Meyer said. “This place has been buzzing. We can’t wait for Artemis II to launch and return.”