The simple answer is: No planet exists that does not have gravity. All planets, by definition and nature, possess gravitational force.
Understanding Gravity
Gravity is a fundamental force of nature. It's the attraction between any two objects with mass. The more massive an object, the stronger its gravitational pull. This force is what holds planets together, keeps them in orbit around stars, and governs the structure of the universe.
Why All Planets Have Gravity
The very formation of a planet relies on gravity. A planet begins as a cloud of dust and gas. Gravity pulls these particles together. As the mass accumulates, the gravitational pull increases, attracting even more material. This process continues until a planet is formed. Therefore, gravity is intrinsic to the existence of a planet.
What About Small Planets or Dwarf Planets?
Even smaller planets like Mars or dwarf planets like Pluto have gravity. While the gravitational force on these smaller bodies is weaker than that of larger planets like Jupiter or Earth, it's still present and measurable. You'd weigh much less on Pluto than on Earth, but you would still experience a downward pull due to Pluto's gravity.
Common Misconceptions
Sometimes, people might think of a "lack of gravity" in the context of achieving weightlessness. Weightlessness experienced by astronauts in space isn't due to the absence of gravity. Instead, it's because they are in a constant state of freefall around the Earth. Earth's gravity is still acting on them, keeping them in orbit.
In conclusion, it's a misconception that a planet could exist without gravity. Gravity is a fundamental property of matter, and it's essential for the formation and existence of planets.
