Step by Step
1
Falcon 9 and reusability
SpaceX's Falcon 9 features a reusable first stage that lands back on a drone ship, cutting launch costs roughly tenfold. The first successful reuse occurred in 2017. Crew Dragon has carried crewed missions to the ISS since 2020.
2
Starship — the next leap
Starship is fully reusable, 9 meters in diameter, and capable of carrying roughly 100 tons of payload — more than the Saturn V rocket that carried Apollo astronauts to the Moon.
3
Other commercial players
Blue Origin's New Shepard offers suborbital space tourism. Virgin Galactic offers spaceplane-based tourism. Rocket Lab's Electron rocket specializes in launching small satellites.
4
Falling costs and NASA's changing role
Cost per kilogram to low Earth orbit (LEO) has fallen dramatically: from about $1.4 million with Saturn V, to about $2,700 with Falcon 9, with Starship targeting roughly $100. NASA's Commercial Crew program has outsourced routine LEO transport to private companies, freeing NASA to focus on deep space missions like Artemis.
Applied Walkthrough
1
In 2017, SpaceX achieved the first successful reuse of an orbital rocket's first stage with Falcon 9 — landing it back on a drone ship rather than discarding it, cutting launch costs roughly tenfold in the process.
2
Since 2020, SpaceX's Crew Dragon capsule has carried astronauts to the ISS, part of NASA's broader Commercial Crew program that has outsourced routine low Earth orbit transport to private companies.
3
Meanwhile, Starship — fully reusable and capable of carrying roughly 100 tons of payload, more than the legendary Saturn V — represents the next major leap in this trajectory toward cheaper, more frequent access to space.
4
This dramatic cost reduction is best illustrated by the numbers themselves: launching a kilogram to low Earth orbit cost about $1.4 million with Saturn V, has fallen to about $2,700 with Falcon 9, and Starship is targeting a startling $100 per kilogram — a transformation that has freed NASA to focus its own resources on deep space exploration, like the Artemis program.
Exam Application
Exams test whether you know the significance of Falcon 9's 2017 reuse milestone, whether you know Starship's key specifications relative to Saturn V, and whether you understand the overall trend in cost-per-kg to LEO across different rocket generations.
⚠ Common Trap
The most common trap is underestimating the actual magnitude of cost reduction achieved by reusable rockets — the drop from roughly $1.4 million per kg (Saturn V) to roughly $2,700 per kg (Falcon 9) represents a genuinely enormous, multiple-orders-of-magnitude change in the economics of spaceflight, not just an incremental improvement.
✓ Quick Self-Check
1. What made Falcon 9's 2017 achievement significant?
It was the first successful reuse of an orbital rocket's first stage, cutting launch costs roughly tenfold.
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2. How does Starship's payload capacity compare to the Saturn V rocket?
Starship can carry roughly 100 tons, more than the Saturn V.
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3. What does NASA's Commercial Crew program do?
Outsources routine low Earth orbit crew transport to private companies, freeing NASA to focus on deep space missions like Artemis.
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4. Roughly how has cost per kg to LEO changed from Saturn V to Falcon 9?
From about $1.4 million per kg down to about $2,700 per kg.
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5. Name two commercial spaceflight companies besides SpaceX.
Any two of: Blue Origin, Virgin Galactic, Rocket Lab.
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