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Explore why astronauts experience microgravity on the ISS, how orbital free fall works, and why tiny forces still matter in space.

Discover how astronauts and scientists use the International Space Station to study fluid behavior, transport, and capillary effects in microgravity.

Discover how NASA explored Mars through orbiters, landers, rovers, and sample analysis, revealing the planet’s geology, climate, and habitability.

Discover how the ISS Cupola gives astronauts a panoramic view of Earth, supports robotic operations, and functions in the harsh environment of space.

Learn how NASA was created, from Sputnik and the Cold War to the 1958 Space Act that launched America’s civilian space agency.

Learn how ISS expeditions are planned, launched, conducted, and handed over across rotating crews aboard the International Space Station.

Learn why the International Space Station depends on regular resupply missions, what they deliver, and why orbiting logistics are essential.

Learn why astronauts on the ISS experience microgravity, not zero gravity, and how orbit creates weightlessness without removing gravity.

Learn why the International Space Station must be reboosted regularly, how atmospheric drag lowers its orbit, and what keeps it safely in space.