CNN — A large asteroid could be reclassified as a dwarf planet -- which could make it the smallest in the solar system -- after new research revealed it's shape, astronomers said on Monday. Nestled in ...

A hot, rocky planet discovered using the Kepler space telescope is the smallest ever found outside our solar system. The new planet, called Kepler-37b, has a radius less than a third the size of Earth ...

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 orbit.

Our solar system appears beautifully organized, but its stability is actually the result of an incredibly delicate cosmic ...

Mercury, the smallest planet in our solar system, has captivated scientists due to its extreme temperatures, dense iron-rich core, magnetic field, and distinctive geological features. Recent research ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Mercury is the smallest planet in the solar system. (Pluto used to hold the title, but it was ...

Scientists have located the smallest planet found to date outside the solar system, astronomers with the Spanish Research Council and University College London announced Wednesday. The planet has a ...