The Carnegie Institution for Science and the International Astronomical Union’s Minor Planet Center has announced the discovery of dwarf planet 2015, the world with an extremely distant aphelion ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

Within this nebula, the hot core of the star remains—crushed to high density by gravity—as a white dwarf with temperatures ... At this point the pressure at its center will become so great ...

One of the largest exoplanets to be found orbiting a relatively low-mass star has been discovered, thanks to the way the planet's gravity drags ... orange K-class dwarf with just 64% the mass ...

A blue atmosphere, smooth areas, and youthful mountain ranges - this dwarf ... planet may still be geologically active, but scientists are uncertain about what form that activity may take. It was ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

Pluto is a dwarf planet. As the name suggests, a dwarf planet is smaller than a planet. Its force of gravity is not strong enough to pull in all the many other objects in its orbit around the Sun.

ESO’s Very Large Telescope (VLT) was able to capture a third detail that puts Hygiea in the running for a dwarf planet — it has just enough mass for its gravity to pull it together in a ...