A celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but has not cleared its neighboring region of planetesimals and is not a satellite. It has to have sufficient mass to overcome rigid body forces and achieve hydrostatic equilibrium. Pluto is considered to be a dwarf planet.
NASA launches commercial studies to facilitate Mars robotic science
NASA launches commercial studies to facilitate Mars robotic science by Clarence Oxford Los Angeles CA (SPX) May 02, 2024 NASA...