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Reusable rockets
November–December 2015 (Blue Origin, SpaceX landings)· Invention or discovery· Transport & space
Well documentedSolid records, physical evidence or scientific consensus.
Rocket boosters that fly back and land upright after launch so they can be refueled and flown again.
See it on the Technology & Medicine map →How it works
For decades nearly all rockets were thrown away after one flight; the Space Shuttle was partly reusable but costly to refurbish. In November 2015 Blue Origin's New Shepard landed upright after a suborbital hop. In December 2015 a SpaceX Falcon 9 booster returned to Florida after sending satellites to orbit. SpaceX first reflew a booster in 2017, and some have now flown more than 20 times.
Why it mattered
Reuse helped cut launch costs per kilogram several-fold, letting SpaceX launch most of the world's satellites, including thousands for its Starlink internet network.
Think of it like
Expendable rockets are like flying an airliner once and scrapping it; reuse means refueling it and flying again.
How we know
Live-streamed landings and company flight records; launch logs compiled by analysts such as astronomer Jonathan McDowell; cost-per-kilogram estimates by NASA and CSIS.
Still unknown or debated
How much reuse truly saves is debated, since SpaceX's costs are private; fully reusable rockets such as Starship are still being tested.
Connections (3)
▸Apollo 11 Moon landing used expendable rockets, unlike Reusable rocketsWell documented
The connection
Each Saturn V flew once: its stages fell into the ocean or were left in space, and only the small capsule came home. A launch cost about $185 million in 1969 dollars, over $1 billion today. The Space Shuttle was partly reusable but costly to refurbish; modern reusable rockets land their boosters and fly them again.
When and how
Saturn V launches from Florida, 1967–1973; Blue Origin's first suborbital booster landing in Texas, November 2015; SpaceX's first orbital-class booster landing at Cape Canaveral, December 21, 2015.
How we know
NASA budget records document Apollo's costs; launch records show some SpaceX boosters reflown more than 20 times.
Debates and open questions
How much reuse lowers costs is debated, since SpaceX does not publish full figures; whether expendable rockets were a necessity of Apollo's era or a choice is also argued.
▸Reusable rockets launch satellites that extend The Internet (TCP/IP)Well documented
The connection
Cheap, frequent launches made it affordable to put thousands of small satellites into low orbit. SpaceX's Starlink, launched mostly on reused Falcon 9 boosters since 2019, provides Internet service to remote areas, ships and aircraft; by 2025 it had thousands of satellites and several million users.
When and how
Starlink launches from Florida and California since May 2019; rivals include OneWeb and Amazon's Project Kuiper, which began launching production satellites in 2025.
How we know
Launch logs and subscriber figures reported by SpaceX and regulators document the link; most Starlink satellites ride boosters that have flown before.
Debates and open questions
Astronomers worry about streaks in telescope images and about space debris; who should regulate huge private satellite fleets, and whether they will stay profitable, is open.
▸Space Race gave way to the commercial era of Reusable rocketsMostly agreed
The connection
The Space Race built rockets as single-use national projects, which kept launches very expensive. NASA's partly reusable Space Shuttle (1981–2011) proved costly to refurbish. When NASA began buying cargo flights and launches from private companies in the 2000s, firms such as SpaceX and Blue Origin pursued landing and reflying boosters to cut costs.
When and how
NASA's commercial cargo program from 2006; Blue Origin's New Shepard landed November 23, 2015; SpaceX's Falcon 9 booster landed in Florida on December 21, 2015.
How sure are we?
NASA contracts and launch records document the shift; some reused Falcon 9 boosters have flown more than 20 times, and published launch prices fell.
Debates and open questions
How much reuse itself lowers costs, versus SpaceX's other efficiencies, is debated; Chinese state and private companies are now building reusable rockets too.