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

Thank whoever decided to make the Dark Energy Camera Legacy Survey public for this discovery A trio of scientists have ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...

Pluto was officially reclassified from a planet to a dwarf planet by the International Astronomical Union (IAU) in August 2006. While Pluto orbits the Sun and is large enough to be spherical due ...

Every year, Earth follows a familiar pattern of seasonal changes: As summer rolls around in the Northern Hemisphere, winter creeps in in the Southern Hemisphere, and vice versa. But do other ...

The two space surveys, conducted 23 years apart, could show how a secret planet orbits. Since the demotion of Pluto to dwarf planet, there’s been a ninth-planet-shaped hole in the hearts of many ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...

They lie about 250 astronomical units from a third brown dwarf, making the system even more complex. Adding a planet to this picture only deepens the mystery. The system belongs to the Argus ...

Pluto was classified as a dwarf planet on August 24, 2006 at the International Astronomy Union (IAU) General Assembly. It was stripped of its planet status, under IAU Resolution 5A, ‘Definition ...

Astronomers have discovered a freezing-cold world orbiting within the so-called "forbidden zone" around a dying star in which planets are normally destroyed. The 5.8-billion-year-old white dwarf ...

But now, the so-called dwarf planet has set up shop in the realm of the water bearer — where it will remain until March 8, 2043. Petite but potent, Pluto was discovered in 1930 and re-classified ...

(Exoplanets are defined as any planet beyond our solar system.) Don't expect to travel there any time soon. It's 244 light-years away from the Earth -- for comparison, the dwarf planet Pluto is ...