Space Weekly Briefing

Compiled Tuesday, September 15, 2026 · Firefly, Starcloud, Transcelestial, Blue Origin, SpaceX, Axiom Space, Relativity Space
This is a daily snapshot compiled from public web search, updated every weekday morning — it does not auto-refresh in real time. This run covers roughly Sept 13–15. The main development is SpaceX's Starship Flight 14 slipping again, now NET Sept 22 (from the previously reported Sept 18), with Booster 21/Ship 41 confirmed as the stack and both vehicles now expected to attempt ocean splashdowns rather than a catch — the catch attempt has been pushed to Flight 15. Firefly, Starcloud, Transcelestial, Blue Origin, Axiom, and Relativity were otherwise quiet beyond items already covered in prior briefings.

Firefly Aerospace

No significant updates this window. The two-launch Alpha deal with SSC Space to open a European launch site in Sweden (Sept 9) remains the latest state of play, already covered in a prior briefing.

Starcloud

No significant updates. Nothing new since the Aug 21 $250M raise at a $2.3B valuation (with Nvidia and Cisco Investments joining as new backers), already covered in a prior briefing. A second satellite with 100x the first's power generation remains slated for an October 2026 launch.

Transcelestial

No significant updates. Nothing new since the Aug 20 LatConnect 60 deal for an optical comms terminal on the SWIRSAT-1 imaging mission plus ground-network access, already covered in a prior briefing.

Blue Origin

No significant updates. New Glenn remains grounded following the May 28 static-fire explosion at Cape Canaveral's Launch Complex 36; Blue Origin still targets a return to flight by year's end.

SpaceX

Sep 14Starship Flight 14 slips again to NET Sept 22; catch attempt deferred to Flight 15

Flight 14 — the first Starship V3 flight and SpaceX's first attempt to reach orbital velocity with the new configuration — is now targeting no earlier than Sept 22 at 12:15 UTC from Starbase Pad B, a further slip from the Sept 18 window reported last week. The stack pairs Super Heavy Booster 21 (full-duration static fire completed Aug 28) with Ship 41 (six-engine static fire completed Aug 21); both vehicles are expected to attempt soft ocean splashdowns rather than a tower catch, with Musk pegging the catch attempt on Flight 15 at 50–60% odds of success.

Axiom Space

No significant updates this window. The Switzerland operations leadership appointment (Sept 10) remains the latest state of play, already covered in a prior briefing.

Relativity Space

No significant updates this window. NASA's addition of Terran R to its Launch Services II contract vehicle and reporting that the "late 2026" debut has likely slipped into 2027 remain the latest state of play, already covered in a prior briefing.