Blue Origin

GS3

In Development

Third stage for New Glenn, announced Nov. 5, 2026. Blue Origin says it is already under contract for a cislunar mission with a government customer scheduled to launch in 2028. The agency is not named. It uses the BE-7 engine at better than 460 seconds of vacuum specific impulse and can deliver up to 14 metric tons to GEO and 20 metric tons to trans-lunar injection on the 9x4 vehicle, or up to 8 metric tons to GEO and 10 metric tons to trans-lunar injection on the 7x2. Ars Technica quotes Dave Limp saying one cislunar customer is signed for 2028.

Latest update Nov 7, 2026

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Current status

Composite liquid-hydrogen tank pressurized to 100 percent of maximum expected operating pressure for 2.5 hours, and to 150 percent for 10 minutes, at Launch Site One. Not flown.

  1. Blue Origin introduces the Northstar engine and a New Glenn third stage

    Blue Origin said on Nov. 5 that its Northstar booster engine produces 715,000 pounds of thrust, versus 640,000 for the BE-4, with 30 percent less mass and half the parts, and that a new BE-7 third stage, GS3, is under contract for a government cislunar launch in 2028 with stated capacity of up to 14 metric tons to GEO on New Glenn 9x4. The newsroom post says Northstar joins BE-4 and gives no flight date, after development testing began 11 months from approval. At the UP.Summit, CEO Dave Limp told Ars Technica that Northstar will eventually replace BE-4 on New Glenn at about a quarter of the manufacturing cost, while BE-4 production continues for United Launch Alliance's Vulcan.

    www.blueorigin.com www.blueorigin.com arstechnica.com + United Launch Alliance

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