Latest NASA Science News

NASA Conducts Artemis II Fuel Test, Eyes March for Launch Opportunity  

NASA concluded a wet dress rehearsal for the agency’s Artemis II test flight early Tuesday morning, successfully loading cryogenic propellant into the SLS (Space Launch System) tanks, sending a team out to the launch pad to closeout Orion, and safely draining the…

Artemis II Wet Dress Rehearsal: Test Terminated at T-5:15

The Artemis II wet dress rehearsal countdown was terminated at the T-5:15 minute mark due to a liquid hydrogen leak at the interface of the tail service mast umbilical, which had experienced high concentrations of liquid hydrogen earlier in the…

Artemis II Wet Dress Rehearsal: Entering Terminal Count at T-10 Minutes 

NASA teams officially entered the final 10 minutes of today’s Artemis II wet dress rehearsal countdown known as terminal count after Charlie Blackwell-Thompson, NASA’s Artemis launch director, gave the “go” to proceed.   During terminal count, automated systems take control of countdown operations, final…

Artemis II Wet Dress Rehearsal: Closeout Crew Departs Launch Complex 39B

NASA’s Artemis II closeout crew has completed its critical tasks and departed NASA Kennedy’s Launch Complex 39B during the Artemis II wet dress rehearsal.   The departure of the closeout crew marks the transition to the final countdown phase, ensuring the launch pad…

Artemis II Wet Dress Rehearsal: Launch Abort System Hatch Closed

NASA teams completed closing the launch abort system hatch during the Artemis II wet dress rehearsal, simulating final launch day procedures. The launch abort system hatch provides access to the Orion crew module through the outer aeroshell of the launch abort system…

Artemis II Wet Dress Rehearsal: Closeout Work in White Room Continues

The Artemis II wet dress rehearsal entered the T-10 minute hold in the simulated countdown at 8:50 p.m. EST. Though it had been counting down to the opening of a simulated launch window at 9 p.m. EST Monday, Feb. 2,…

Artemis II Wet Dress Rehearsal: Crew Module Hatch Preparations and Closure 

As part of the Artemis II wet dress rehearsal, NASA teams are performing final preparations and closure of the Orion crew module hatch inside the White Room at Launch Pad 39B. This step simulates launch day procedures, ensuring the spacecraft…

Artemis II Wet Dress Rehearsal: Closeout Crew Departs to White Room 

As part of the Artemis II wet dress rehearsal, NASA’s Artemis II closeout crew and pad rescue team are en route to Launch Pad 39B. The closeout crew will head to the White Room inside the crew access arm on…

Artemis II Wet Dress Rehearsal: All SLS Stages in Replenish Mode 

NASA teams have transitioned all cryogenic tanks on the SLS (Space Launch System) rocket to replenish mode during the Artemis II wet dress rehearsal. This includes both liquid hydrogen and liquid oxygen tanks for the core stage and the interim cryogenic propulsion stage. Engineers continue…