Pluto was a planet in good standing for seventy-six years when in 2006, ... Options aside, here are three big reasons why the IAU’s decision, not Pluto, should be ditched.

Pluto, therefore, is not the gravitationally dominant object in its neighborhood — and thus, not a planet, according to the new definition. Related: When will Pluto complete its first orbit ...

Pluto fit that ancient description perfectly: it does not twinkle and appears to wander about the night sky, very unlike a star. But the definition of planet has changed many times over the centuries.

Their contention: Pluto looks, acts, sounds, tastes, and smells like a planet. If you were to put it anywhere else in the solar system, it would’ve always been called a planet without a second ...

Planet or not, Pluto has sparked public interest, particularly after the 2015 flyby of NASA’s New Horizons mission, which gave Earth the first up-close look at the distant object.

Astronomers Say Pluto Is Not a Planet. August 24, 2006. By Daniela Deane. Forget what you learned in third grade. Pluto is no longer one of the nine planets of the solar system.

In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a ...

If it weren't for the new budget, New Horizons could keep exploring the outer reaches of the solar system into the 2030s.

Officially, Pluto is still not a planet. But five years after the ruling that demoted the icy object to dwarf planet, people continue struggling with the definition, ...

Pluto was relegated to dwarf planet status in 2006, just months after the spacecraft that Bowman manages, called New Horizons, began its 3 billion-mile journey to pay a visit.

(CNN) - Make Pluto great again? That seems to be the aim of a new study that urges Pluto be returned to its former planetary glory. The research, published in the scientific journal Icarus, says ...