Low-Earth Orbit (LEO) Satellites
Definition
Low-Earth Orbit (LEO) satellites are satellites that orbit the Earth at a relatively low altitude, typically below 2,000 kilometers. They are used for a variety of purposes, including communications, Earth observation, and scientific research.
Why It Matters
Large constellations of LEO satellites, like SpaceX's Starlink and Amazon's Project Kuiper, are being deployed to provide high-speed, low-latency internet access to underserved and rural areas across the globe. Their low altitude reduces the signal delay compared to traditional geostationary satellites.
Contextual Example
A person living in a remote rural area with no access to fiber or cable internet can use a small satellite dish to connect to the Starlink LEO satellite constellation and get high-speed broadband internet.
Common Misunderstandings
- LEO satellites travel at very high speeds and a large "constellation" of them is needed to provide continuous coverage to a given area.
- The increasing number of LEO satellites is raising concerns about space debris and astronomical observation interference.