a planet that exists outside of our 'solar system' (this is the only solar system, because our sun is named 'Sol')
extra-solar planet.
earth
neptune
neptune
Jupiter is the largest planet and Mercury is the smallest planet in our solar system. Extra-solar radii extremes would be HAT-P-32b as the largest and Kepler-42d as the smallest.
The first extra-solar planet (in other words, circling a star and not our sun) was discovered in 1995.
There are currently 8 planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune) in our solar system, with Pluto having been demoted to dwarf planet a few years ago.
Neptune is our 8th planet in the solar system!
Extra solar planets are planets that is outside of our solar system.
The coldest planet in the solar system is Pluto, which is considered as a dwarf planet.
saturn the 5th planet from the sun is the lighest planet in the solar system.
The biggest planet in our Solar System is Jupiter.