--- title: "Meaning & Key Takeaway of: Our astronauts, when they go orbiting…" description: "\"Our astronauts, when they go orbiting around the earth, they actually come back slightly younger than a twin that they would have on the planet Earth w..." image: "https://sms4smile.com/quotes/i/e23/michio-kaku-907_actually_our-astronauts-when-they-go-orbiting-aro_2934507.png" --- # Our astronauts, when they go orbiting around the earth… ![“Our astronauts, when they go orbiting around the earth, they actually come back slightly younger than a twin that they would have on the planet Earth who was stationary. This is called the twin paradox.” quote by Michio Kaku](https://sms4smile.com/quotes/i/e23/michio-kaku-907_actually_our-astronauts-when-they-go-orbiting-aro_2934507.png) [Download](https://sms4smile.com/quotes/i/e23/michio-kaku-907_actually_our-astronauts-when-they-go-orbiting-aro_2934507.png) [Open image](https://sms4smile.com/quotes/i/e23/michio-kaku-907_actually_our-astronauts-when-they-go-orbiting-aro_2934507.png) > “Our astronauts, when they go orbiting around the earth, they actually come back slightly younger than a twin that they would have on the planet Earth who was stationary. This is called the twin paradox.” [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Orbiting astronauts age slower than Earth‑bound twins due to relativistic time dilation (twin paradox). **In simple terms:** Space travel slows aging. Key Takeaway Consider relativistic effects in space missions. Themes science relativity space travel Mood educational wonderful Type scientific informative When to use this quote - space missions - educational videos - science curricula Key Concepts time dilation physics paradox Questions to Reflect On - How does velocity affect aging? - What implications for long‑duration spaceflight? A Different Perspective Complex math behind it. ★ ★ ★ ★ ★ No ratings yet [Actually](https://sms4smile.com/quotes/about/actually/) [Around](https://sms4smile.com/quotes/about/around/) [Astronauts](https://sms4smile.com/quotes/about/astronauts/) [Back](https://sms4smile.com/quotes/about/back/) [Called Twin](https://sms4smile.com/quotes/about/called-twin-4343079/) [Come](https://sms4smile.com/quotes/about/come/) [Earth](https://sms4smile.com/quotes/about/earth/) [Earth Stationary](https://sms4smile.com/quotes/about/earth-stationary-3373540/) [Go](https://sms4smile.com/quotes/about/go/) [Orbiting](https://sms4smile.com/quotes/about/orbiting-454049/) [Orbiting Earth](https://sms4smile.com/quotes/about/orbiting-earth-4343078/) [Our](https://sms4smile.com/quotes/about/our/) [Paradox](https://sms4smile.com/quotes/about/paradox/) [Planet](https://sms4smile.com/quotes/about/planet/) [Planet earth](https://sms4smile.com/quotes/about/planet-earth/) [Slightly](https://sms4smile.com/quotes/about/slightly/) [Space](https://sms4smile.com/quotes/about/space/) [Stationary](https://sms4smile.com/quotes/about/stationary/) [Than](https://sms4smile.com/quotes/about/than/) [Twin](https://sms4smile.com/quotes/about/twin/) [Twin Paradox](https://sms4smile.com/quotes/about/twin-paradox-4343077/) [Who](https://sms4smile.com/quotes/about/who/) [Would](https://sms4smile.com/quotes/about/would/) [Younger](https://sms4smile.com/quotes/about/younger/) ## Related quotes > [The following passage is one of those cited by Copernicus himself in his preface to De Revolutionibus: "The Syracusan Hicetas, as Theophrastus asserts, holds…](https://sms4smile.com/quotes/marcus-tullius-cicero/the-following-passage-is-one-of-those-cited-by-copernicus-himself-in/) [Marcus Tullius Cicero](https://sms4smile.com/quotes/author/marcus-tullius-cicero/) > [One orbit, with a radius of 42,000 kilometers, has a period of exactly 24 hours. 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