The IAU “planet” and “dwarf planet” definitions both require a body have enough mass to self-gravitate into a spherical shape. The minimum radius an icy body ...
What is a Planet? · It must orbit a star (in our cosmic neighborhood, the Sun). · It must be big enough to have enough gravity to force it into a spherical shape.
The Minor Planet Center (MPC) is the single worldwide location for receipt and distribution of positional measurements of minor planets, comets and outer ...
The 2006 IAU Resolution means that the Solar System officially consists of eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. In ...
The International Astronomical Union (IAU) defined in August 2006 that, in the Solar System, a planet is a celestial body that: is in orbit around the Sun, ...