A new and improved definition for the term 'planet' will soon be proposed that would expand the title beyond the confines of solar system to include every alien world we discover. In 2006, over 2,500 ...

The official definition of a “planet” could be set to change again soon. Last time that happened, Pluto was kicked out of the club, but the new proposed definition is designed to be more inclusive.

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...

For many people, the definition of a planet was only made clear in 2006, when the spunky world Pluto was demoted from a planet to a dwarf planet. Now, a team of astronomers is pushing for “planet” ...

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On August 24th, a session of the International Astronomical Union (IAU), meeting in Prague, passed a resolution re-defining the planets of our solar system. Only about 428 of the IAU’s nearly 10,000 ...

The world’s astronomers, under the auspices of the International Astronomical Union (IAU), have concluded two years of work defining the difference between “planets” and the smaller “solar system ...

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...

It still wouldn't include Pluto, unfortunately. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space news, the latest updates on rocket ...