Explanation:

Introduction:
The heaviest planet in our solar system is Jupiter.

Key Points:
- Jupiter is the fifth planet from the Sun and is the largest planet in our solar system.
- It is a gas giant, primarily composed of hydrogen and helium.
- Jupiter's mass is approximately 2.5 times that of all the other planets in the solar system combined.
- Its mass is about 318 times that of Earth.
- Due to its immense size and mass, Jupiter exerts a strong gravitational pull.
- This gravitational pull affects the orbits of nearby objects, including other planets and asteroids.
- Jupiter's gravity also influences the formation and stability of the asteroid belt located between Mars and Jupiter.
- The strong gravity of Jupiter has also led to the capture of several moons in its orbit.
- Jupiter has a total of 79 known moons, the four largest being called the Galilean moons.
- These moons are named after the astronomer Galileo Galilei, who first observed them in 1610.
- The Galilean moons are Io, Europa, Ganymede, and Callisto.
- Ganymede, the largest moon in the solar system, is even larger than the planet Mercury.

Conclusion:
Jupiter is the heaviest planet in our solar system. Its immense mass and gravitational pull have significant effects on the dynamics of the solar system, influencing the orbits of other planets, asteroids, and moons.