The largest single celestial object in the solar system would be the Sun (or Sol), inside which over a million Earths could comfortably fit.
The largest volcano and largest mountain in the Solar system is Olympus Mons on the planet Mars.
Sol The Sun is the name we use for the star of this solar system.
Jupiter. I'm not sure about your solar system, though.
Ganymede is a moon of Jupiter. It is the largest moon in our solar system and also the ninth largest object in the solar system overall. Discovery of Ganymede dates back to Galileo Galilei in 1610.
callisto
Smallest or largest, there is only one star in our Solar System - The Sun.
Comet
Jupiter is the largest planet in our solar system, and it has 63 known moons.
Name: Olympus MonsLocation: Mars
The largest planet in our solar system is Jupiter.
Mount Everest.
Name: Olympus MonsLocation: Mars