In very simple terms, low Earth orbit (LEO) is exactly what it sounds like: An orbit around the Earth with an altitude that lies towards the lower end of the range of possible orbits. This is around 1 ...

Hundreds of satellites may soon be flying in orbital regions that are already too packed to allow safe and long-term ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

The planets of our solar system all orbit the Sun within a few degrees of a flat plane extending out from our star’s equator — its equatorial plane. That makes sense. Our solar system began as a ...