Scientists Propose Changing Definition of Planet, Here’s Why

BERLIN – In 2006, the International Astronomical Union (IAU) redefined planet, which resulted in Pluto being downgraded to a “dwarf planet”.

This definition is based on several criteria, including whether the object orbits the Sun, has enough mass to become round due to gravity, and has “cleared the neighborhood” around its orbit of other objects.

However, this definition has some astronomers struggling, including Dr. Jean-Luc Margot, lead author of a new study proposing the new planet definition. One problem with the IAU definition is that it is vague, and does not include exoplanets (planets orbiting stars other than the Sun). Another problem is that it leads to seemingly illogical results, such as Pluto being classified as a dwarf planet, while Ceres and Eris are classified as planets.

This definition would include all eight planets in our solar system, as well as the dwarf planets Pluto, Eris, Haumea, Makemake, and Ceres. It would also include many of the exoplanets that have been discovered in recent years.

Dr. Margot believes that his new definition is simpler, clearer, and more inclusive than the current IAU definition. He also believes that it will lead to a more consistent and logical classification of planets.

The IAU has not officially responded to Dr. Margot’s proposal, but it is likely that the definition of a planet will be revisited in the future. With more and more exoplanets being discovered, it is important to have a definition of a planet that can be applied to all solar systems.

Discussions about the definition of a planet will likely continue for years to come. However, Dr. Margot’s proposal provides a new and exciting framework for thinking about what it means to be a planet.

(wbs)