Earth’s orbit around the Sun is not circular, but an ellipse. The perimeter of Earth’s orbit is roughly 584 million miles (940 million km).

Millions of human-made objects travel at high speeds in low-Earth orbit, polluting space and increasing the chance of collision with satellites and other spacecraft ...

Thousands of pieces of space debris, also known as space junk, are orbiting Earth, with tons more added each year. This orbital debris poses a significant threat to satellites, spacecraft ...

Due to its orbit being closely matched to our own, calculations indicate the asteroid will orbit Earth again in January 2025 and then in 2055. Mini-moons aren't just curiosities for asteroid-watchers.

The United States military is preparing to launch its secretive X-37B space plane on a seventh mission in orbit.