Quit Whining. Pluto’s Not A Planet, An Astrophysicist Explains

Pluto was reclassified as a dwarf planet in 2006 because it is one of many Kuiper Belt Objects, not a full-sized planet.

The debate has resurfaced, but astronomers say the change reflects better knowledge of the outer solar system, not a demotion of Pluto’s importance.

Pluto’s classification helps scientists study leftover material from the solar system’s formation and understand how planets develop.

Missions like New Horizons and ongoing NASA research continue to show Pluto as a key object in the Kuiper Belt.