Here's what to know about the short life of what was, for a single human lifetime, the solar system's smallest planet. Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the ...

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

A spacecraft operated by the European Space Agency and the Japan Aerospace Exploration Agency has made its final flyby of Mercury, as scientists now work to guide BepiColombo into the planet’s ...

The planet, which orbits its parent star HD156668 about once every four days, is the second-smallest world among the more than 400 exoplanets (planets located outside our solar system) that have ...

Now European Southern Observatory (ESO) thinks one of the objects floating along the main belt might be the smallest ... Dwarf planets in the universe’s remnants When the big bang first happened ...

Stunning pictures of Mercury have been published revealing the sunlit plains and possibly icy craters of the smallest planet ... directly over the planet's north pole. After flying through the ...