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Why the Sun Shines

Diagram of nuclear fusion at the heart of the Sun turning hydrogen into helium

🌌 Part of our complete guide: Space for Kids — explore the whole universe by age (3-11). Explaining to your kids why the Sun shines…

Why Do Astronauts Float in Space?

Earth seen from space with the ISS in orbit: gravity is still 90% strong at 400 km altitude

Do you often wonder how astronauts manage not to fall, when Earth’s gravity still pulls on them at 90%? 🚀 This article explains why astronauts…