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.
China’s Mars rover detects irregular wedges beneath red planet
China's Mars rover detects irregular wedges beneath red planet by Staff Writers Beijing (XNA) Nov 27, 2023 Radars mounted on...
