# Human Spaceflight
## Definition
**Human Spaceflight** sends embodied people beyond Earth rather than delegating exploration to robotic systems. Its scientific, political and cultural value must be distinguished from its much higher cost, biological burden and risk relative to increasingly autonomous probes.
## Conceptual relationships
[[wiki/Space Exploration|Space Exploration]] · [[wiki/Robotic Spaceflight|Robotic Spaceflight]] · [[wiki/Space Technology|Space Technology]]
## Martin Rees research route
[[research/Martin Rees on Machine Succession, Post-Human Intelligence, and the Cosmic Future|Martin Rees on Machine Succession, Post-Human Intelligence, and the Cosmic Future]] supplies a primary quotation dossier connecting this concept to Rees's work on cosmology, technological risk, machine intelligence, posthuman evolution and deep time.
## Article and collection routes
- [[collections/Machine Succession|Machine Succession]]
- [[articles/We Cannot Un-Strike the Match|We Cannot Un-Strike the Match]]
- [[articles/The Last Migration Will Not Be Human|The Last Migration Will Not Be Human]]
- [[articles/We Were Never Going to Make It|We Were Never Going to Make It]]
## Simple Reminders, Quotations, and Thoughts
<!-- BEGIN MARTIN REES MASTER REMINDERS 2026-10-05 -->
> “Space adventure, not space tourism.”
> **— Martin Rees**, *Martin Rees: Black Holes, Alien Life, Dark Matter, and the Big Bang, Lex Fridman Podcast \#305 transcript, 2022*
[[reminders/Exploration/Space Should Be Adventure Not Tourism by Martin Rees|Space Should Be Adventure Not Tourism by Martin Rees]]
> “Robotic techniques are advancing fast, but the cost gap between manned and unmanned missions remains huge, so the need for people is diminishing. Nonetheless, I hope that some people now living will walk on Mars—maybe not for practical goals, but as a magnificent adventure and as a step towards the stars.”
> **— Martin Rees**, *The geckos sent into orbit died, but don’t give up on life in space just yet, The Guardian, 2014*
[[reminders/Exploration/Humans May Reach Mars After Robots Make Them Unnecessary by Martin Rees|Humans May Reach Mars After Robots Make Them Unnecessary by Martin Rees]]
> “The future for manned space exploration will be a cut-price, high-risk programme.”
> **— Martin Rees**, *No need for manned spaceflight, says Astronomer Royal Martin Rees, The Guardian, 2010*
[[reminders/Exploration/Human Spaceflight May Become Cheap and Dangerous by Martin Rees|Human Spaceflight May Become Cheap and Dangerous by Martin Rees]]
> “As a scientist I see little purpose in sending people into space at all.”
> **— Martin Rees**, *For our future in space, China must aim further than the Moon, The Independent, 2013*
[[reminders/Exploration/Science Does Not Need People in Space by Martin Rees|Science Does Not Need People in Space by Martin Rees]]
> “As a scientist and practical man, I am sceptical about manned space flight, but, as a human being, I am strongly in favour.”
> **— Martin Rees**, *Oral evidence: Space policy, UK House of Commons Science and Technology Committee, 2007*
[[reminders/Exploration/Human Spaceflight Can Be Impractical and Magnificent by Martin Rees|Human Spaceflight Can Be Impractical and Magnificent by Martin Rees]]
<!-- END MARTIN REES MASTER REMINDERS 2026-10-05 -->
<!-- BEGIN MARTIN REES PROMOTED REMINDERS 2026-10-05 -->
> “Will self-sustaining space communities be established before a catastrophe sets back the prospect of any such enterprise, perhaps foreclosing it for ever?”
> **— Martin Rees**, *2003, Our Final Hour*
[[reminders/Space Survival/Can We Build Space Settlements Before It Is Too Late by Martin Rees|Can We Build Space Settlements Before It Is Too Late by Martin Rees]]
<!-- END MARTIN REES PROMOTED REMINDERS 2026-10-05 -->