While it is true that the Moon's gravity is weaker compared to Earth's, it still exerts a gravitational force on objects. The lunar gravitational force is about one-sixth of Earth's gravity, which means that objects on the Moon weigh approximately one-sixth of what they would weigh on Earth.
When spaceships or lunar landers land on the Moon's surface, they do not stay put due to the absence of an atmosphere that could create air resistance or wind. Instead, they rely on various mechanisms to remain stable on the lunar surface:
Thrusters: Spaceships and lunar landers are equipped with thrusters that allow them to make controlled landings. These thrusters provide a downward force, counteracting the Moon's gravity and allowing the spacecraft to land gently.
Landing Legs: Many lunar landers have extendable legs that provide stability and support upon landing. These legs are designed to absorb the impact and maintain balance on the uneven lunar terrain.
Anchoring: Some spacecraft may use anchoring mechanisms to secure themselves to the lunar surface. These can include harpoons, screws, or drills that penetrate the lunar soil to create a more secure connection with the ground.
It's important to note that even with the Moon's weaker gravity, objects can still fall or be moved by external forces. However, the design of spaceships and lunar landers takes these factors into account to ensure they remain stable during landing operations.