Here's a breakdown of the situation:
* The IAU's decision: In 2006, the IAU decided to reclassify Pluto as a dwarf planet, based on the following criteria:
* It orbits the sun.
* It has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape.
* It has not cleared the neighborhood around its orbit.
* Dr. Tyson's stance: Dr. Tyson has been a vocal proponent of the IAU's decision. He argues that the reclassification is based on scientific evidence and that Pluto, despite its historical status as a planet, doesn't fit the definition of a planet under the new criteria.
* Public reaction: The decision sparked a lot of debate and controversy, with many people, especially those who grew up learning about Pluto as a planet, feeling disappointed and even outraged by the reclassification.
* Dr. Tyson's role in public discourse: Dr. Tyson, as a popular astrophysicist and science communicator, played a significant role in explaining the IAU's decision and its rationale to the public. He was a vocal advocate for the scientific basis of the reclassification, while also acknowledging the emotional connection people have with Pluto.
It's important to remember that Dr. Tyson did not personally decide to exclude Pluto from the exhibits of planets. He is a scientist who was involved in explaining a decision made by the IAU, a globally recognized organization that sets standards in astronomy. His role was to provide information and perspective on a scientific issue that became a topic of public interest.
