SpaceX’s step-by-step path to making humanity multiplanetary — what’s already done, what’s being built now, and the stated targets ahead. 8 of these milestones are already achieved; future items are SpaceX’s goals, and its timelines have historically slipped, so they’re labelled as targets rather than promises.
On its fourth flight Falcon 1 became the first privately developed liquid-fuel rocket to reach orbit — the survival milestone that made everything after it possible.
Space.comFalcon 9 landed its first stage vertically for the first time, proving rockets could be recovered — the breakthrough that underpins SpaceX economics.
Wikipedia — Falcon 9 flight 20After the first reflight in 2017, reuse became routine; a single Falcon 9 booster has now flown 30+ times, and SpaceX recovers fairings too — the cost base that funds Starship and Mars.
SpaceX — Falcon 9Musk unveiled the fully-reusable super-heavy system (then "ITS", later Starship) as the vehicle to make humanity multiplanetary, powered by methane it could one day make on Mars.
SpaceX Mars colonization program (Wikipedia)The first full Starship + Super Heavy launch cleared the pad and gathered flight data before being destroyed — the start of an aggressive build-test-fly campaign.
Wikipedia — SpaceX StarshipOn Flight 5 the launch tower's arms caught the returning Super Heavy booster out of the air — a landing concept many called impossible, and the key to rapid reuse.
Wikipedia — SpaceX StarshipSpaceX reflew a Super Heavy booster for the first time (Flight 9, 2025) and debuted the larger, more capable Starship V3 (100+ t to LEO) in 2026.
NASASpaceflight — StarshipThe remaining technical prize: routinely recovering and quickly reflying both the booster and the ship. Booster catch is demonstrated; reliable ship reuse and a fast turnaround are still being proven.
SpaceX — StarshipTransferring cryogenic propellant between two Starships in orbit is the prerequisite for reaching the Moon and Mars — a tanker fleet must top up a deep-space Starship after it reaches orbit.
Wikipedia — Starship Propellant Transfer DemonstrationNASA selected a lunar-optimised Starship as the Human Landing System for Artemis — a major vote of confidence and a funded path that advances the Mars vehicle too.
NASA — HLSBefore astronauts fly, SpaceX must demonstrate an uncrewed Starship landing on the Moon — proving deep-space refuelling, transit and precision landing end to end.
NASA — ArtemisStarship is slated to land the first Artemis astronauts — including the first woman — near the lunar south pole, the first crewed Moon landing since 1972. NASA's schedule has slipped repeatedly.
NASA — ArtemisMusk has aimed the first uncrewed Starships at the late-2026 Earth–Mars transfer window to test entry, descent and landing and scout sites — but put the odds of hitting it at roughly 50/50, gated on demonstrating orbital propellant transfer first. By early 2026 SpaceX had signalled more near-term focus on the Moon, so treat 2026 as aspirational; the launch window recurs about every 26 months.
Space.com — Starships to Mars in 2026Landing heavy cargo on Mars and proving in-situ resource utilisation — making methane and oxygen from Martian CO₂ and water ice — is what makes the return trip, and a permanent presence, possible.
SpaceX — MarsThe first astronauts to Mars would follow successful uncrewed landings and proven life support and refuelling. Musk has suggested dates as early as 2029–2031; independent observers expect the 2030s. It remains a target, not a schedule.
SpaceX — MarsA small, growing outpost — power, habitats, a propellant plant — would turn flags-and-footprints into a foothold, the seed of a permanent settlement.
SpaceX — MarsMusk's stated end goal: a self-sustaining Martian city that could survive even if resupply from Earth stopped — the threshold at which humanity becomes truly multiplanetary. This is a multi-decade aspiration, not a dated plan.
SpaceX Mars colonization program (Wikipedia)The ultimate purpose behind every step above: a backup for life and consciousness beyond a single planet. Whether or not the dates hold, it is the explicit reason SpaceX exists.
SpaceX — Mission