Saturn.
Jupiter is the largest planet and the smallest is pluto .
There are eight planets in the solar system, but the planet closest to the sun is Mercury.
The fifth planet in our Solar System is Jupiter The fifth largest planet in our Solar Syster is Earth
The largest moon in the solar system is Ganymede, a moon of Jupiter. The moon is larger by volume than the planet Mercury but is only half as massive.
Your question could mean there is a name "4TH planet" and asking about what it is. If you mean "what is the planet which is the fourth one away from the Sun ?" your answer would be Mars.
Saturn
There is no unknown planet yet but the biggest planet in the solar system is Jupiter.
Saturn!!!!!!!!!!!!
It is Saturn.
The largest planet in our solar system is Jupiter.
Jupiter is the largest planet and the smallest is pluto .
because the planet jupiter is the biggest planet in our solar system and the word jupiter means supreme god
There are eight planets in the solar system, but the planet closest to the sun is Mercury.
The name of the planets are:MercuryVenusEarthMarsJupiterSaturnUranusNeptuneThey constitute the solar system.
Jupiter got its name from the link of the Roman Gods, Jupiter, and Jupiter is the biggest planet in the Solar System
Jupiter
As of right now, there is no tenth planet in our solar system. There are only 8, as Pluto is no longer considered a planet.