Starship Flight 15 Slips as Moon Landing Hinges on Refueling

Starship has reached orbit, but the Moon still depends on refueling

NASA's plan to send astronauts to the Moon and then to Mars rests on SpaceX's Starship, and the rocket has finally reached orbit. Its next flight has slipped, though, and the one capability a lunar landing cannot do without has still not been tested: moving cryogenic propellant from one ship to another in space.

On September 28, Flight 14 became the first Starship to reach orbital velocity. It released 26 of SpaceX's new Starlink V3 broadband satellites, which are too large to fit inside a Falcon 9.6 The mission did not go fully to plan. One of the upper stage's vacuum-optimized Raptor engines shut down during ascent, so SpaceX cut a planned flight of about 10 hours to about three. The ship still made a controlled splashdown at a backup site north of Hawaii.69 Each V3 satellite is rated to add roughly 1 terabit per second of network capacity. By that measure, one Starship launch adds about ten times the capacity of a Falcon 9 load of older satellites.9

The Starlink numbers explain why SpaceX is spending so heavily on Starship. The Artemis schedule explains why NASA is watching so closely.

Flight 15: a ship catch attempt with no launch date

SpaceX has not set a date for Flight 15. Early this month, provisional planning documents pointed to October 19 for Flight 15 and October 30 for Flight 16.7 Those dates have not held. Space.com now reports that both flights appear to have slipped to mid-to-late November, with no public confirmation of a firm date.2 Florida Today puts Flight 15 at no earlier than November and Flight 16 at no earlier than December.5 One public flight log lists a provisional November 8 target.17 The launch tracker KeepTrack goes further and predicts the flight will slip into November or later. It notes that SpaceX had posted no mission page and the FAA had published no flight-specific license change as of October 11.3

The rough two-month gap between flights explains much of the delay. Starship flew on May 22, July 24 and September 28 this year. That is well below the rate SpaceX's licenses allow.3 Flight 15 is expected to use Booster 22 and Ship 42, and it may also try to catch the upper stage with the launch tower for the first time. In mid-September, the tower arms at Pad 2 lifted Ship 42 into a simulated catch position. Elon Musk has put the odds of a successful first catch at "at least 50 or 60 percent."317 SpaceX itself had not confirmed the catch plan as of mid-October.3 SpaceX has caught Super Heavy boosters since October 2024, but it has never caught a ship.3

The ship catch matters beyond the spectacle. Recovering the upper stage is required for a fully reusable vehicle. Full reuse in turn makes the many tanker flights in SpaceX's lunar plan affordable.

Starship's move to Florida

The other change is geographic. SpaceX has said Starship will launch from Kennedy Space Center's Pad 39A by the end of the year. A SpaceX director said on October 1 that work at the pad was going "super well" and that at least one more Texas flight would come first. That makes Flight 16 the earliest possible Florida debut.7 An FAA air-traffic planning presentation lists Flight 16 as "Starlink 30-1" from LC-39A, provisionally no earlier than December 10. NASASpaceflight called that date "super provisional."1710

The preparations on the ground point the same way. SpaceX has stopped all Falcon 9 Starlink launches from Florida, saying future Space Coast Starlink missions will fly on Starship. On October 14, a Starship barge carrying a Starlink V3 satellite loader returned to Cape Canaveral.5 The FAA has approved up to 44 Starship launches a year from Pad 39A and is working on a permit for up to 76 a year from Launch Complex 37.5 One step is still missing: no Starship booster or ship has arrived in Florida yet.5

The Florida pad also matters for NASA. The Starship that flies on Artemis III is due to launch from Pad 39A.7

How Artemis changed

Artemis III is no longer a Moon landing. NASA redesignated it this year as a crewed test in low Earth orbit. Orion astronauts will dock separately with test versions of SpaceX's Starship lander and Blue Origin's Blue Moon lander.2918 The first crewed landing has moved to Artemis IV, still targeted for 2028.527 NASA has said lunar surface missions will begin in 2028.25

Reports differ on when Artemis III will fly. Florida Today describes it as "mid to late 2027."5 One mission tracker says no earlier than late 2027 and calls the schedule uncertain.18 Some reference pages still carry older wording that conflicts with the new mission plan.15 The most consistent reading is that NASA intends to fly the docking test in 2027, and that the date depends on whether both landers are ready.

The redesignation looks like a sensible hedge rather than a retreat. NASA keeps flying crews and tests both commercial landers. It no longer has to wait on Starship's refueling campaign.18 NASA also plans a "dual launch" approach for later landings, in which the lander reaches orbit first and waits for the Orion crew. Launching SLS, Starship and Blue Moon in close succession on Artemis III gives teams practice with that timing.29

Refueling: the step that hasn't happened

The reporting agrees that ship-to-ship propellant transfer is the main obstacle. Starship's dry mass and the energy needed to reach, land on and leave the Moon are more than one launch's worth of propellant can cover. That makes refueling in orbit a requirement, not a convenience.1216 SpaceX transferred more than 10 metric tons of liquid oxygen between two tanks inside one ship on Flight 3 in March 2024. That was a real first, but it did not involve two vehicles or a docking.1619

The two-ship demonstration has been delayed repeatedly. It was planned for March 2025, then moved to March 2026, and had no date as of September.14 Neither SpaceX nor NASA has announced one since.3 Some coverage says SpaceX still lists a long-duration flight and a propellant-transfer test as 2026 goals.12 With Flight 15 now likely in November and Flight 16 penciled in for December, two refueling flights a few weeks apart before year's end look very unlikely.142

The number of flights involved is large. Estimates for a lunar landing campaign range from about eight tanker launches to 15 or 20.19 Astronomy.com reports NASA is planning for more than ten tanker flights at roughly one every six days. The final count depends on how much propellant boils off and how efficient transfers turn out to be.16 An uncrewed lunar landing demonstration by Starship must also come before Artemis IV.1617 A failed or partial transfer test would delay every one of these later milestones.12

Mars waits for the Moon

Mars depends on the same capability. Musk said last year there was a "50/50" chance Starship would attempt a Mars mission in 2026. The Mars launch window, which opens about every 26 months, starts in late October, and with no propellant transfer demonstrated, that attempt is off.2 This is the clearest sign of how the Moon-to-Mars plan actually works: Mars cannot happen until refueling is proven.

The cost question

The financial side is less clear than the engineering. A Government Accountability Office official said NASA has no single overall cost estimate for the Moon-to-Mars campaign, because the agency tracks costs project by project.21 Three Artemis projects account for nearly $7 billion in cost overruns. Four contracts NASA canceled or repurposed this year, including the Exploration Upper Stage and the Gateway's HALO module, had grown from about $2.8 billion to $5.9 billion.21 NASA Administrator Jared Isaacman has refused to adopt a per-flight cost estimate.21

What's next

Artemis II gave NASA some momentum. Its April crewed lunar flyby produced a 130-page preliminary science report that describes unexpected colors on the lunar surface.30 International support for the Artemis Accords has grown to 76 signatory countries.22 All four Artemis II astronauts have now left active flight status, and the Artemis IV landing crew has not been named.27

NASA has scheduled an Artemis briefing at Kennedy Space Center for October 23. Isaacman and program leaders are expected to cover flight plans and landing preparations.24 The briefing is the next chance for NASA to say how much of its 2027–2028 plan depends on a Starship refueling test that still has no date. On the evidence so far, the Moon schedule now depends on SpaceX's refueling test more than on SLS or Orion. Even if Flight 15 succeeds, it will not settle that question.