Of the five dwarf planets in the Solar System – including Eris, Ceres, Makemake, and Haumea – Pluto is easily the best-known ...

Trying to understand the makeup and evolution of the solar system's Kuiper belt has kept researchers busy since it was ...

It must have cleared all other celestial bodies, except its own moons, from its orbit.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

Ever since William Herschel discovered Uranus in 1781, astronomers have been eager to find new planets on the outer edge of ...

Professor Noville, a Spanish scientist, has discovered a formula using the gravitational bending of light to pinpoint celestial objects including hazardous asteroids ...

the committee declared that Pluto no longer qualified as a planet because of its position in the cluttered Kuiper Belt, where thousands of objects sit beyond the orbit of Neptune. Pluto ...

astronomers began to wonder whether Pluto might be the first object to have been spotted as part of a population of small icy bodies beyond the orbit of Neptune. Pluto’s surface looks pretty ...

But on November 19, Pluto enters Aquarius, leaving Capricorn behind for 248 years and allowing this sign to begin a new and ...

In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...