No one country discovered all the planets:
The Sun and the eight major planets are part of our solar system.
Eight
There were nine planets. Then astronomers got together and decided what to do with Eris, a dwarf planet that was discovered. They decided to make a definition for what is a planet. That led to Pluto being demoted to a dwarf planet.
It has to be eight words.
There are eight planets that circulate our sun.
Over 900 planets have been discovered orbiting other stars. These are called exoplanets.
The Sun and the eight major planets are part of our solar system.
Because there are only eight planets in our solar system, a definition of "top" would be needed - since the definition would thus have to include exoplanets discovered outside the solar system.
There are eight planets and five dwarf planets in our solar system.
In our solar system, there are eight recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, and Uranus. The total number of planets outside of our solar system can only be hypothesized, but evidences of new planets are being discovered at an ever increasing rate.
There are eight planets.
There are only eight planets in our solar system.
eight planets in the solar system
Eight
There are eight true planets in our solar system.
There are eight planets in our solar system.
Pluto, it was discovered in 1930 and remained as the ninth planet until 2006. Since the 2006 reclassification of Pluto to a Dwarf Planet, there are now eight planets in our solar system.