Blue Origin reveals New Glenn GS3 kick stage and Northstar booster engine
Blue Origin confirmed a New Glenn Glenn Stage 3 (GS3) kick stage for direct GEO and TLI missions—under contract for a 2028 cislunar flight—and Northstar, a LOX/LNG booster engine rated at 715,000 lbf thrust.
Blue Origin on November 5, 2026 unveiled two New Glenn upgrades: Glenn Stage 3 (GS3), a kick stage for direct geostationary orbit (GEO) and Earth-escape trajectories, and Northstar, a new LOX/LNG first-stage engine rated at 715,000 pounds of thrust (confirmed, Blue Origin). CEO Dave Limp presented the hardware at an invite-only Up.Summit event at Kennedy Space Center as the company works toward a return to flight after a late-May pad explosion (reported, Spaceflight Now).
What happened
- GS3 mission role: the optional third stage enables direct injection to GEO and Earth-escape / trans-lunar injection (TLI), multi-payload deployment, extended coasts and multiple precision burns. Blue Origin says GS3 is already under contract for a government cislunar mission in 2028 (customer undisclosed) (confirmed, Blue Origin).
- Payload performance (company figures): on the 9×4 vehicle, up to 14 metric tons to GEO and 20 metric tons to TLI; on the 7×2, up to 8 t to GEO and 10 t to TLI. GS3 uses the same fixed payload adapters and fairing as the two-stage rocket and sits in an interstage so fairing volume is unchanged (confirmed, Blue Origin).
- Propulsion and lunar link: GS3 is powered by the BE-7 engine (also used on Blue Moon Mark 1 and 2). Vacuum specific impulse is cited as better than 460 seconds for GS3 profiles. The stage is not required for Blue Origin’s lunar-lander architecture but can support sustained cislunar operations by delivering mass directly to TLI and preserving lander propellant (confirmed, Blue Origin).
- Tank testing: at Launch Site One in Texas, Blue Origin pressurized a composite liquid-hydrogen tank to 100% of Maximum Expected Operating Pressure (MEOP) for 2.5 hours and to 150% of MEOP for 10 minutes. The company expects the GS3 tank to be the first composite LH2 tank flown in space (confirmed, Blue Origin).
- Northstar booster engine: LOX/liquefied natural gas, oxygen-rich staged combustion with a single-shaft turbopump—same cycle family as BE-4. Thrust rises from BE-4’s 640,000 lbf to 715,000 lbf; Blue Origin cites 30% less mass, 50% fewer parts, and more than 65% of the engine produced via additive manufacturing, with assembly possible in less than a day. Program approval to development testing took 11 months (confirmed, Blue Origin).
- Status and fleet role: Northstar “joins” BE-4 as a second booster engine; no first-flight date was announced. Spaceflight Now, citing a person familiar with the program, reported Northstar is intended for New Glenn 9×4 vehicles while BE-4 remains on the return-to-flight mission (reported, Spaceflight Now). Ars Technica separately reported Blue Origin believes Northstar can eventually be built at about one-quarter the cost of a BE-4 (reported, Ars Technica).
Why it matters for space investors
Direct-to-GEO and heavy TLI capability would put New Glenn into contests that today often need a kick stage or a larger stack—GEO constellation inserts, national-security high-energy missions and cislunar logistics. Pairing that with a lighter, higher-thrust, faster-to-build booster engine is Blue Origin’s bid to close the cadence and cost gap with reusable heavy-lift peers while it recovers from the May pad mishap.
Blue Origin is private (Amazon founder Jeff Bezos). Listed and tracked names exposed to heavy-lift competition and Artemis/cislunar demand include SpaceX, Rocket Lab and ULA’s Vulcan return-to-flight path. Lunar context ties to our Isaacman Artemis III / Blue Moon coverage and the earlier Artemis briefing on Starship, Orion and Blue Moon tugs. Watch New Glenn return-to-flight timing and the named 2028 cislunar GS3 mission on our launch calendar and markets hub.
Not financial advice.
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