Eris is more massive than Pluto but has a smaller volume. It has only one known Moon, called Dysnomia, and it orbits the Sun in just over 559 years. At its closest approach, Eris is 5.7 billion ...

Planets orbit the Sun in roughly circular paths, and moons orbit around planets. Asteroids and comets move in paths which are more oval in shape. The Sun’s gravity holds all of these objects ...

Gilmour Space Technologies announced the Eris rocket could launch “no earlier” than March 15, which would mark the first Australian-built rocket aiming for orbit. Founded by brothers on the ...