What is a Planet and Why Does it Matter?
New Research Paper Says it is Time to Return to Original Definition made by Galileo
New Research Paper Says it is Time to Return to Original Definition made by Galileo
A group of researchers are pushing the International Astronomical Union (IAU) to change its current definition of a planet from one based on its orbital mechanics to one focused on its inherent composition. This change, they note, is long overdue,...


















































