Pluto, once considered the ninth planet of our solar system, has been a topic of intrigue since its reclassification as a ...

The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the ...

What happened to Pluto Why did astronomers feel the need change something as seemingly basic as membership in our solar system? The answer lies in the definition of, or lack there of, the word ...

Counterintuitively, Pluto's atmosphere continued to expand as it began its long journey away from the Sun.

Pluto was demoted from a planet to a dwarf planet in 2006. So why is its status still so controversial today?

On August 24th, 2006, Pluto was officially demoted from being a planet, which apparently caused some people to be outraged. Pluto didn’t meet the final rule, as Britannica writes: So, what was the IAU ...

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why Pluto isn't a planet.