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Overview

Low Earth Orbit (LEO)

The region of orbits a few hundred kilometres above Earth, used by stations, crewed spacecraft, and many satellites.

Reading time
1 min
Sources
1 cited
Updated
6 Sept 2026

A Soyuz spacecraft docked to the International Space Station, the Earth below.Real photograph · NASA / images.nasa.gov · Public Domain (NASA)

Key facts

Body
Low Earth Orbit (LEO)

#nizka-obezna-draha-leo#bodies

Contents · 4
  1. 01Overview
  2. 02Key context
  3. 03Sources
  4. 04Connections

Low Earth orbit, commonly called LEO, is the most accessible region of space. It is where the first orbital flights, spacecraft rendezvous, spacewalks, and long-duration station crews were demonstrated.

LEO is not a single altitude or a single orbit. The choice of a particular orbit depends on inclination, altitude, launch-vehicle capability, atmospheric drag, and mission purpose. For human spaceflight it is essential infrastructure for further expeditions.

Key context

  1. Atmospheric drag in LEO gradually lowers the orbit of objects without periodic corrections.
  2. The ISS operates in low Earth orbit.
  3. Reaching LEO primarily requires gaining high horizontal velocity.

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Sources & further reading

last verified · 6 September 2026

  1. NASA: explanation of the low-Earth-orbit environment and its use.

Spaceflightpedia. (n.d.). Low Earth Orbit (LEO). Retrieved 18 October 2026, from https://spaceflightpedia.com/article/low-earth-orbit

article text — CC-BY-SA · ◉ NASA photography — public domain · ✦ AI illustration — marked, generated from sources

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