New Why Is Pluto No Longer Considered A Planet Pics. Why is pluto no longer a planet? Because it does not follow this rule, pluto is no longer considered a planet.
National geographic news says that, according to the international astronomical union, a full planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity.
National geographic news says that, according to the international astronomical union, a full planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. Pluto was found and classified as a planet in 1930, when astronomer clyde tombaugh of the lowell observatory compared photographic plates of the sky on separate nights and noticed a tiny dot that drifted back. But everything changed in 2006. Tombaugh at the lowell observatory in flagstaff arizona.