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NASA's Exploration Ground Systems

@NASAGroundSys
We build, launch, and recover rockets and spacecraft for Artemis, humanity’s return to the Moon. 
Verification: nasa.gov/socialmedia
NASA's Exploration Ground Systems’s Tweets
ARTEMIS I UPDATE: The rollout of & to Launch Pad 39B has now moved up to tomorrow, the evening of Aug. 16, ahead of the targeted Aug. 29 launch. Stay tuned for more information as well as ongoing coverage.
These new photos of the show an unobstructed view of the rocket with the retraction of 10 work platforms for the Umbilical Release and Retract Test (URRT) inside of High Bay 3 in the Vehicle Assembly Building at .
ARTEMIS I UPDATE: Engineers are making progress repairing the area where a liquid hydrogen leak was detected during the Artemis I launch attempt Sept. 3, and NASA is preserving options for the next launch opportunity as early as Friday, Sept. 23.
MORE: go.nasa.gov/3QpfnPT
🌅 A sunrise view of the Artemis I rocket and spacecraft at Launch Pad 39B at in Florida on March 21, 2022.
Artemis I Update: NASA will roll the Artemis I Space Launch System rocket and Orion spacecraft back to the Vehicle Assembly Building on Monday, Sept. 26. First motion is targeted for 11 p.m. EDT.
MORE: go.nasa.gov/3LL6m2O
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The spacecraft has been secured in the recovery ship well deck. The USS Portland will return to Naval Base San Diego, where Orion will be readied for ground transport back to . More here: blogs.nasa.gov/artemis/
Artemis I recovery update: is now in the well deck of the USS Portland. Teams with EGS and the DoD continue to make progress to safely secure the spacecraft.
Two solid rocket boosters are readied for mating to the rocket’s two aft skirts on June 16, 2020, inside ’s Rotation, Processing and Surge Facility. Together, the twin boosters provide more than 75 percent of the total SLS thrust at launch. 🚀
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The Crew Access Arm (CAA) of the Mobile Launcher is being retracted and placed into its travel position.
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All objectives for the Artemis I cryogenic demonstration have been met.
We are in our planned hold at T-10 minutes. Currently, the upper stage liquid hydrogen is 78% filled. Core stage has been topped off – both liquid hydrogen and liquid oxygen are 100% filled. The ethernet switch has been replaced and will be verified.
All elements polled are 'go’ to proceed with the terminal count. Countdown clock is resuming at T-10 minutes. No constraints to launch.
We are now in launch countdown for Artemis I, call to stations happened at 1:24 a.m. ET this morning. Weather is currently 90% favorable for our next launch attempt on Nov. 16 at 1:04 a.m. ET.
MORE: go.nasa.gov/3UUfhSV
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UPDATE: Engineers continue to troubleshoot the quick disconnect that connects the ground system to the rocket. Meanwhile, core stage liquid oxygen is currently 99% full and into topping.
Upper stage liquid hydrogen is now in 'topping'. The Range Safety Officer is testing the Flight Termination System (FTS). The launch team is determining our new launch time.
The rocket and spacecraft have cleared the Vehicle Assembly Building perimeter.
Thank you to our 'red crew' team that has completed their work at the pad. We are now back in replenish for core stage liquid hydrogen. Team is working on resuming flow to the upper stage.
Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians continue to prepare the Space Launch System rocket and Orion spacecraft for Artemis I.
MORE: go.nasa.gov/3ciicnw
The launch countdown clock has now resumed.
And with that, we at have completed assembly of a Moon rocket! Through , and will allow us to live and work on the Moon, paving the way to Mars.
WE ARE GOING. 🚀🌕
More: go.nasa.gov/3vCkUti
Who’s ready to return to the Moon?! 🌕
Tomorrow kicks off NASA’s continued Artemis I wet dress rehearsal testing. Stay tuned to this account and nasa.gov/live for ongoing coverage.
Get the details: go.nasa.gov/39F5Rsi
The spacecraft, which recently traveled around the Moon on Artemis I, is now back at . The spacecraft arrived at the Multi-Payload Processing Facility (MPPF) at approximately 4:15 p.m. today.
Engineers with Exploration Ground Systems and lifted the rocket core stage for the I mission in the Vehicle Assembly Building at . Check out this timelapse from operations.
We have stopped flow of liquid hydrogen to the core stage due to an intermittent leak on the replenish valve. Teams are discussing a plan to send out the 'red crew' to the pad to torque packing nuts at the base of the mobile launcher.
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Teams are proceeding with ops for #Artemis I wet dress rehearsal. There were four lightning strikes within the LC 39B perimeter, there are currently no countdown constraints. Teams will review data at 6 am EDT for a decision to proceed with tanking. More:go.nasa.gov/3KgK872
#Artemis I Weather Update: Weather has improved to 80% for the start of the launch window at 8:33 a.m. EDT on Mon., Aug. 29. Primary concerns are cumulus clouds and flying through precipitation.
Photos from Thursday's Artemis I wet dress rehearsal roll out by engineer Benjamin Bair.
#Artemis I rocket core stage lift operations photos in the transfer aisle of the Vehicle Assembly Building at .
A total lunar eclipse glows above and at Pad 39B in the pre-dawn hours on Nov. 8, 2022. This "blood moon" will not return to our sky until 2025.
📸: NASA/Sean Cannon
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After disconnecting the ground and rocket-side plates on the interface, called a quick disconnect, for the liquid hydrogen fuel feed line, teams have replaced the seals on the core stage associated with the liquid hydrogen leak detected.
MORE: go.nasa.gov/3qrCa2T
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Check out this very high-angle photo of after the launch vehicle stage adapter (LVSA) stacking in High Bay 3 of the Vehicle Assembly Building at . #Artemis
The #Artemis I core stage has been lowered down onto the mobile launcher in High Bay 3 of the Vehicle Assembly Building at . Teams are continuing work to secure the core stage to the solid rocket boosters for I.
Liquid hydrogen has resumed with a slow manual fill.
We are now in replenish mode on upper stage for both liquid hydrogen and liquid oxygen. We remain in a hold.
Final preparations are underway in the transfer aisle for the lift and mate of the core stage to the boosters on the mobile launcher in High Bay 3 of the Vehicle Assembly Building at . #Artemis
The Vehicle Assembly Building High Bay 3 doors are now fully open.
🏖🚀 Beautiful view of and at Launch Pad 39B yesterday, Aug. 20, 2022, as seen from the Atlantic Ocean.
Photo: NASA/Sean Cannon
🚀 We're getting very close to the launch of #Artemis I! The two-hour window for launch opens at 1:04 a.m. EST Nov. 16. Stay tuned for ongoing coverage starting now.
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Up Close & Personal: The #Artemis I core stage on the mobile launcher in High Bay 3 of the Vehicle Assembly Building at . Weighing more than 188,000 lbs without fuel and standing 212 feet, the core stage is the largest part of the Space Launch System rocket.
Pictured on the left side of this image is the liquid hydrogen (LH2) "flare stack" where vented LH2 is burned off safely, while and lifts off from Pad 39B on Nov. 16, 2022 at 1:47 am EST at .
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Stunning view courtesy of the NASA drone team showing the rocket core stage now docked at . 👏
Billy Cairns, Chad Garrett, and Trent Annis from 's 'red team,' heroes of the Artemis I launch who responded to a hydrogen leak, were thanked & congratulated by Administrator . During the Apollo 11 launch, a red team also went to the pad to address a LH2 leak.
Another view, looking up at & today. Ground Systems teams are working to remove equipment and scaffolding away from the rocket and will continue retracting the platforms until the entire rocket is revealed ahead of the upcoming wet dress rehearsal test.
We are currently in a planned liquid hydrogen engine 'bleed test'.
Half of Platform C in High Bay 3 of the Vehicle Assembly Building is now retracted, continuing to reveal more of & .
Teams have completed the final flight termination system (FTS) test for Artemis I with and in the Vehicle Assembly Building at .
We are ready. We are going. 🚀
The rocket & spacecraft have now cleared the perimeter of the Vehicle Assembly Building.
The liquid oxygen tank is now 75% filled. Liquid hydrogen is at 48%. Both liquid oxygen and liquid hydrogen are currently in fast fill. Teams are monitoring closely.
The Vehicle Assembly Building at is really looking great. The American flag and NASA logo were recently repainted for . 🚀
Teams have completed the retraction of the Crew Access Arm (CAA), putting it into launch configuration for #Artemis I. While is uncrewed on this first mission - the CAA, at the 274-ft level on the mobile launcher, provides entry and emergency egress to the spacecraft.
What a sight! The historic launch of I saw and lift off from Launch Pad 39B at on Nov. 16, 2022, at 1:47 a.m.
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Check out this compilation of timelapse videos from inside the Vehicle Assembly Building at , which tell the story of the #Artemis I core stage lift and stacking.
MORE: go.nasa.gov/3gm56F3
The morning fog has lifted at Launch Pad 39B, revealing spectacular views of & at the pad for #Artemis I wet dress rehearsal.
High Bay 3 doors have just started opening.
Teams have completed closeouts on boosters and finished work inside . Next, engineers will close launch abort system hatch and retract the crew access arm. Weather is currently 70% favorable for launch on Aug. 29. Read more: go.nasa.gov/3pIDK03
The Artemis I flight test around the Moon will launch no earlier than Sept. 27, with a backup opportunity of Oct. 2 under review.
MORE: go.nasa.gov/3d6nKCm
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✨ Four astronauts will venture around the Moon on #Artemis II, the first crewed mission on 's path to establishing a long-term presence at the Moon for science and exploration.
Download this poster and more here:
nasa.gov/specials/artem
The 'red crew' team has successfully remedied the leak, and it has not recurred. Bad ethernet switch is being replaced now.
Teams have stopped flowing liquid hydrogen into the rocket, as a leak has been detected in the engine cavity. Teams are troubleshooting by warming up the area. Standby for updates.
Take a closer look at the NASA worm logo on one of the twin boosters in High Bay 3 of the Vehicle Assembly Building at , where the rocket for I is really coming together!
An overhead view shows the fully stacked twin solid rocket boosters for the rocket on top of the mobile launcher inside High Bay 3 of the Vehicle Assembly Building at in Florida on June 9, 2021.
#ARTEMIS I UPDATE:
⚡ spacecraft and core stage are powered up
🚀 Final core stage & engine preps complete
☁ 60%-80% 'go' for weather during 2-hour launch window
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Teams at Mission Control Center have handed the spacecraft over to the Exploration Ground Systems team to proceed with recovery efforts for the spacecraft.
Around 7:30am EDT & arrived atop Pad 39B after a nearly 10-hour journey from the Vehicle Assembly Building. Teams will configure systems at the pad for launch, targeted for no earlier than Aug. 29 at 8:33 a.m. (2 hour window).
MORE: go.nasa.gov/3bXLO9Z
Teams have completed pressurization of the line and restarted flow of liquid hydrogen to the tank.
Snoopy is home!
Launch director Charlie Blackwell-Thompson delivers #AstronautSnoopy to Peanuts senior vice president Melissa Menta following the conclusion of the #Artemis I mission to the Moon. Snoopy flew aboard as the zero-gravity indicator.
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Take a ride on the Vehicle Assembly Building High Bay 3 elevator, and enjoy a stunning view of and , the rocket and spacecraft that will kick off humanity's return to the Moon with Artemis I.
Check out these beautiful aerial photos of the Artemis I booster segments arriving at last month!
The Moon rocket & spacecraft will roll out of the Vehicle Assembly Building for the first time tomorrow, March 17, for wet dress rehearsal at Pad 39B. Platforms around the rocket have almost all been retracted and the crawler is in place under the vehicle.
Crawler transporter-2 and mobile launch platform 1 with concrete ballast completing the crawlerway conditioning recently. 25.5 million pounds were applied to the crawlerway to ready it for the massive weight of the and stack for Artemis I.
The Interim Cryogenic Propulsion Stage (ICPS) has been stacked. It joined the launch vehicle stage adapter, core stage, and boosters on the mobile launcher in High Bay 3 of the Vehicle Assembly Building at for the upcoming launch of I.
Ten levels of work platforms, a total of 20 platform halves, surround the rocket and spacecraft in High Bay 3, providing access for ongoing testing and processing operations before the vehicle is transported to Launch Pad 39B.
More: go.nasa.gov/3ovjui6
Who's ready to make history?! In just one week, the launch window will open for to launch , propelling on its way to a distant retrograde orbit around the Moon, farther out and ~3X the duration of any Apollo mission. #Artemis
Tune in tomorrow, March 17, when we will have live updates on & . For the first time, the rocket will roll out of the Vehicle Assembly Building at 5pm to make its way to Launch Pad 39B for wet dress rehearsal in preparation for the launch of Artemis I.
