Question

question: the ___ develops the guidelines that classify any celestial object as a planet.

Explanation:

The International Astronomical Union (IAU) sets the criteria for classifying celestial objects as planets. In 2006, the IAU defined a planet as a celestial body that orbits the Sun, is spherical in shape due to its own gravity, and has cleared its orbit of other debris.

Answer:

International Astronomical Union (IAU)