The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Spacecraft burn tons of fuel and leave behind debris—but a clever technique called aerobraking could fix both problems.

Space Norway, the European satellite operator, has signed an agreement with Starlink by SpaceX to provide Low Earth Orbit ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Spacecraft that orbit around Earth do so in two types of orbits: circular and elliptical. In a circular orbit, the spacecraft is always at the same distance from the center of the Earth.