What Is the Moon’s Gravity? Strength and Effects

What the Moon’s gravity means

Gravity is the attractive force associated with mass. The Moon has gravity because it contains matter, and that gravity acts on objects near it and on Earth as well. The familiar figure for lunar surface gravity is approximately 1.62 m/s² (meters per second squared). This is the acceleration an object would gain as it falls near the surface if other forces, such as air resistance, were negligible.

Gravity is not a special property unique to the Moon, nor does the Moon switch gravity on and off as it moves through its phases. Its gravitational attraction is present all the time. The Moon’s shape, rotation, and uneven distribution of mass make the field vary somewhat from place to place, so 1.62 m/s² is a useful average rather than an exact value at every point.

People often ask “What is the moon’s gravity?” to learn how much lighter they would feel there or why astronauts can jump in slow, high arcs. Those questions involve related but distinct ideas: gravity is an acceleration, while weight is the force gravity exerts on a particular mass.

Why it is weaker than Earth’s

The strength of a body’s gravity at its surface depends principally on its mass and its radius. More mass generally means a stronger pull, while being farther from the body’s center weakens gravity. The Moon is much less massive than Earth, and its surface is closer to its center than Earth’s surface is to Earth’s center. Taken together, these properties produce lunar surface gravity about one-sixth of Earth’s.

That comparison is approximate and applies to surface gravity. It does not mean the Moon has one-sixth of Earth’s mass; the Moon’s mass is about 1.2% of Earth’s. Nor does it mean gravity disappears at a distance. A body’s gravitational pull extends far beyond its surface, becoming weaker with distance.

The Moon’s gravity also varies slightly across its surface. Lunar “mascons,” regions with unusually concentrated mass, affect the local gravitational field and spacecraft orbits. The average figure is adequate for ordinary explanations, but precise lunar navigation and scientific measurements account for these variations.

How lunar gravity affects weight and motion

Weight is the force on an object due to gravity; mass is the amount of matter in it. An object’s mass does not change when it travels from Earth to the Moon, but its weight does. For instance, a 60-kilogram object has a weight of about 589 newtons on Earth and about 97 newtons at the Moon’s surface, using the usual average gravity values. Kilograms measure mass, not weight, even though everyday speech often uses “weight” for a kilogram reading.

For a dropped object, lunar gravity produces less downward acceleration than Earth gravity. In an idealized calculation from rest, ignoring the height of the drop and other complications, an object falls roughly 1.62 meters during its first second on the Moon, compared with about 4.9 meters during its first second on Earth. It does not fall slowly because the Moon has no gravity; it falls more slowly because gravity accelerates it less.

A person could jump higher and remain airborne longer on the Moon than on Earth, assuming the same launch effort and ignoring practical limits. But the Moon’s surface is not an easy place to move: astronauts wear bulky suits, and the surface has no breathable atmosphere. The dramatic hopping seen in lunar footage reflects both reduced gravity and the need to move in pressurized suits.

What the Moon’s gravity does to Earth

The Moon’s pull is a major influence on Earth’s ocean tides. Its gravity pulls more strongly on the side of Earth facing the Moon than on Earth’s center, and less strongly on the far side. The resulting differences in pull, along with the Earth–Moon system’s motion, contribute to tidal bulges. As Earth rotates through these regions, many coastlines experience changing sea levels.

The Sun also affects tides. Although it is far more massive than the Moon, it is much farther away, and the Moon’s proximity makes its tidal influence on Earth especially important. When the Sun, Earth, and Moon are aligned, their tidal effects reinforce one another; when the Sun and Moon are at right angles as seen from Earth, their effects partly offset. Local coast shape, water depth, and other conditions influence the actual tide, so this basic picture does not predict a particular beach’s tide height by itself.

The Moon’s gravity also helps bind the Earth–Moon system and affects their orbits. Earth’s gravity, in turn, keeps the Moon in orbit. An orbit is not the absence of gravity: a spacecraft or moon in orbit is continually falling toward the body it circles while moving sideways fast enough to keep missing it.

Common misconceptions about lunar gravity

“There is no gravity on the Moon.” False. Lunar gravity is weaker than Earth’s but substantial enough to pull objects to the ground and retain a thin exosphere.
“One-sixth gravity means everything has one-sixth the mass.” False. Mass stays the same; weight and gravitational acceleration are lower.
“Astronauts float because the Moon has no gravity.” Astronauts on the Moon stand on its surface. Astronauts in orbit appear weightless because they and their spacecraft are in continuous free fall.
“The Moon’s phases change its gravity.” The phases are changes in how much of the Moon’s sunlit side is visible from Earth. They do not turn its gravity on or off.

Frequently Asked Questions

How strong is gravity on the Moon?

Average surface gravity is about 1.62 m/s², or roughly one-sixth of Earth’s average surface gravity. The exact local value varies slightly with location.

How much would I weigh on the Moon?

Your weight would be about one-sixth of your Earth weight, while your mass would remain unchanged. This is a useful approximation, not a change in the amount of matter in your body.

Can you jump higher on the Moon?

Yes. Lower gravity means a given jump can carry you higher and keep you airborne longer than on Earth, although a spacesuit restricts movement and changes how jumping feels.

Does the Moon’s gravity cause tides?

It is a major cause of ocean tides, through differences in the Moon’s pull across Earth. The Sun contributes too, and local geography affects the tides people observe.

Is there gravity in space near the Moon?

Yes. Gravity extends through space, including around the Moon. Its strength decreases with distance, and the balance of gravitational pulls helps determine spacecraft and lunar orbits.

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