2020 – NASA sets the stage for Green Run testing of the SLS (Space Launch System) rocket’s first core stage as the flight article is lifted and installed on the B-2 Test Stand at NASA Stennis on Jan. 21-22.

2021 – Mary Byrd is named NASA Stennis associate director.

2021 – NASA conducts a historic hot fire of its SLS (Space Launch System) core stage for the Artemis I mission on Jan. 16 on the B-2 Test Stand at NASA Stennis. The team successfully completes the countdown and ignition, but the engines shut down a little more than one minute into the hot fire.

2021 – NASA conducts a full-duration hot fire of more than 8 minutes of its SLS (Space Launch System) core stage on March 18 on the B-2 Test Stand at NASA Stennis, the most powerful test conducted at NASA Stennis in more than 40 years.

2021 – Aerojet Rocketdyne, an L3Harris Technologies company, conducts its final RS-68 test on the B-1 Test Stand at NASA Stennis on April 12, concluding a landmark testing partnership. NASA Stennis, Aerojet Rocketdyne Closes Historic Commercial Test Partnership – NASA.

2021 –Renaming ceremony for the A-1 Test Stand to the Fred Haise Test Stand in honor of Apollo Astronaut and Biloxi native, Fred Haise.

2022 – On Feb. 8, NASA Stennis conducts the 50th hot fire of a RS-25 engine since “return-to-test” began in 2015. It also marks the 100th test an RS-25/space shuttle main engine is fired at 111% power level.

2022 –Relativity Space plans to build comprehensive facilities in the Stennis Test Complex to test its Aeon R engines. The company envisions the completed project as one of the largest commercial test facilities in the nation.

2022 – Artemis I successful mission completed the first in a series of increasingly complex missions that will enable human exploration on the Moon and future missions to Mars.

2022 – NASA Stennis and Rocket Lab USA conducts a ribbon cutting for the aerospace company to locate its engine test complex at the rocket propulsion site.

2023 – NASA completes an initial 12-test certification series on June 22 with a full-duration hot fire of an RS-25 engine, manufactured by SLS engines lead contractor Aerojet Rocketdyne, on the Fred Haise Test Stand at NASA Stennis. NASA Achieves Key Milestone for Production of Future Artemis Engines – NASA

2023 – Crews conduct a test of the NASA Stennis navigation lock system on Aug. 3, following a successful installation of four refurbished gates. The project marked the first time the gates had been removed from the system since original installation almost 60 years ago. NASA Stennis Lock System Project – NASA

2023 – NASA Stennis teams with Relativity Space on Sept. 7 as the company to announce a lease agreement for the company to operate the historic A-2 Test Stand onsite. NASA Stennis Inks Expanded Test Complex Agreement with Relativity Space – NASA

2023 – NASA Stennis completes the initial RS-25 engine certification series.

2023 – Renaming ceremony for the B Test Stand in memory of the late Senator Thad Cochran.

2024 – The SpaceX Transporter 10 mission launches March 4, carrying dozens of micro- and nanosatellites to orbit, including a Sidus Space LizzieSat-1 that carries NASA Stennis first-ever in-space mission – the ASTRA (Autonomous Satellite Technology for Resilient Applications) hardware/software payload.  Pending Launch Will Signal Start of Historic NASA Stennis Mission – NASA

2024 – NASA completes a second RS-25 engine 12-test certification series at NASA Stennis, the final major test milestone for production of new engines for future Artemis missions to the Moon and beyond. NASA Achieves Milestone for Engines to Power Future Artemis Missions – NASA

2024 – John Bailey is named director of NASA Stennis on April 24. NASA Administrator Names New Stennis Space Center Director – NASA

2024 – NASA Stennis and partner Sidus Space Inc. announce primary mission success July 2 for the center’s historic in-space mission aboard an orbiting satellite – the ASTRA (Autonomous Satellite Technology for Resilient Applications) hardware/software payload.  NASA Stennis Achieves Primary Success for Historic In-Space Mission – NASA

2024 – Christine Powell is named deputy director of NASA Stennis, effective Aug. 12. NASA’s Stennis Space Center Announces New Deputy Director – NASA

2024 – NASA Stennis announces Sept. 11 it will continue its historic in-space mission – the ASTRA (Autonomous Satellite Technology for Resilient Applications) hardware/software payload – aboard Sidus Space Inc. satellite. NASA Stennis Set to Continue ASTRA Mission with Sidus Space – NASA

2024 – NASA Stennis announces its first commercial range operations agreement for Skydweller Aero Inc. to operate its solar-powered autonomous aircraft in the site’s restricted airspace. NASA Stennis Takes Key Step in Expanding its Range Operations Work – NASA

2024 – NASA achieved a major milestone for production of new RS-25 engines to help power its Artemis campaign to the Moon and beyond with completion of a critical engine certification test series at NASA Stennis.

2024 – NASA Stennis reaches agreement with first commercial company for range operations work.

2024 – NASA Stennis and Sidus Space, Inc., marked a milestone for the center’s first-ever in-flight autonomous systems software mission as a payload rider on the Sidus Space LizzieSat^TM small satellite.

2024 – NASA achieved a major milestone for production of new RS-25 engines to help power its Artemis campaign to the Moon and beyond with completion of a critical engine certification test series at NASA Stennis.

2025 – NASA Stennis releases its first-ever open-source software, a peer review tool to facilitate more efficient and collaborative creation of systems applications, such as those used in its frontline government and commercial propulsion test work. NASA Stennis Releases First Open-Source Software – NASA

2026 – Christine Powell is named NASA Stennis Center Director.

2026 – Artemis II completes a historic mission as the first crewed flight marking a key step towards long-term return to the Moon and future missions to Mars.

2026 – NASA Stennis conducts a months-long testing project of Liquid Oxygen/Methane to quantify the explosive yield at Eglin Air Force Base in Florida.

2026 – In support of the NASA Administrator’s initiative on strengthening the agency’s core competencies, NASA Stennis swore in 125 employees as the first set of contractor to civil servant employees.

2026 – NASA Stennis enters into an agreement with Blue Origin to support testing their New Glenn Rocket in support of the Artemis program.

2026 – NASA Stennis enters into an agreement with Cowboy Space to test rocket components in the E Complex.