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why is there no gravity in space

The short answer: there actually is gravity in space — lots of it! Astronauts float not because gravity is gone, but because they and their spacecraft are in continuous free fall around Earth, which creates the feeling of weightlessness.

The Big Misconception

When people say “there’s no gravity in space,” they’re usually thinking of videos of astronauts floating inside the International Space Station (ISS) or drifting outside during spacewalks. That floating looks like zero gravity, so it’s easy to assume gravity just stops once you leave Earth’s atmosphere.

But in reality, gravity is everywhere in space. Earth’s gravity still pulls on the ISS (about 90% as strong as on the surface), and the Sun’s gravity holds all the planets in orbit. Gravity never truly disappears; it just gets weaker with distance, but it never reaches zero.

Why Astronauts Float

Astronauts float because they are in free fall — they’re falling toward Earth, but moving sideways so fast that they keep missing it. This is what an orbit is: falling around a planet instead of straight into it.

Think of it like this:

  • If you jump off a tall building, you feel weightless for a moment as you fall.
  • The ISS is like a very fast elevator that’s falling around Earth instead of straight down.
  • Since both the astronauts and the station are accelerating at the same rate, they don’t feel any force pushing them against the “floor,” so they float.

This is called microgravity (not zero gravity) — gravity is still there, but its effects are masked by the constant fall.

How Gravity Works in Space

Gravity is the force of attraction between any two objects that have mass. In space:

  • Earth pulls on the Moon, the Moon pulls on Earth, and both orbit around their common center of mass.
  • The Sun’s gravity keeps all the planets, asteroids, and comets in orbit around it.
  • Even distant stars and galaxies exert a tiny gravitational pull on us, though it’s far too weak to notice.

The strength of gravity depends on:

  • The mass of the objects (bigger mass = stronger pull).
  • The distance between them (farther apart = much weaker pull).

So in deep space, far from any star or planet, gravity is very weak, but it’s still present.

Why Space Feels Like Zero Gravity

Several things make space seem gravity‑free:

  • No air resistance — in orbit, there’s no wind rushing past to tell you you’re moving, so falling feels like floating.
  • No solid ground — there’s no floor pushing up on your feet, so you don’t feel your weight.
  • Orbital motion — the spacecraft and everything inside it are falling together, so relative to each other, everything appears to float.

NASA and scientists often call this “microgravity” to emphasize that gravity is still acting, just not in the usual way we experience it on Earth.

A Simple Analogy

Imagine throwing a ball horizontally:

  • If you throw it slowly, it hits the ground nearby.
  • If you could throw it fast enough, the Earth would curve away beneath it, and the ball would keep falling around the planet instead of hitting it.

That’s exactly what the ISS does: it’s moving sideways so fast (about 28,000 km/h) that as it falls toward Earth, the Earth curves away, and it ends up in a stable orbit.

Bottom Line

  • ✅ Gravity is present in space — it’s what holds planets, moons, and stars in place.
  • ✅ Astronauts float because they’re in free fall around Earth, not because gravity is gone.
  • ✅ “Zero gravity” is a misleading term; “microgravity” or “weightlessness in orbit” is more accurate.

So next time you see an astronaut floating, remember: they’re not escaping gravity — they’re dancing with it, in a never‑ending fall around our planet.

TL;DR
There is gravity in space — Earth’s gravity keeps the ISS and astronauts in orbit. They float because they’re in continuous free fall, not because gravity disappears.