(Last update On: might 23, 2019)

How lot Does the Moon Weigh?

It weighs approximately zero pounds.

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Okay, that’s probably not the price you to be expecting. Permit us to explain.

When you was standing on a scale and also weigh yourself (in pounds), you’re actually acquisition a measure of force. Special, the pressure your human body is exerting downwards top top the scale, because of Earth’s acceleration the gravity. If girlfriend remember Newton, force is same to one object’s mass multiplied by the acceleration (F=ma). The conventional unit because that mass is kilograms, which is additionally how civilization weigh points basically everywhere that isn’t America.

So load is the pressure something exerts on one more thing because of gravity (like girlfriend exert ~ above Earth). If you’re at this time taking a physics class, sometimes you’ll view it arranged together the pressure something exerts back on one more thing as result of gravity. However that’s much less intuitive in our opinion, so we’ll be mentioning weight in regards to the former.

For all intents and purposes, the Moon is not increasing towards the earth (actually, it kind of is, however we’ll obtain to that). So, in the F=ma equation, F = 0 due to the fact that a = 0. Since weight is a measure of force, load = 0.

What Is the Moon’s Mass?

Because the Moon’s acceleration is 0, the worth of the mass becomes irrelevant as soon as calculating that weight loved one to Earth. But, you might be wondering how much fixed the Moon has? that’s a recognized value. It’s around 7.35 * 10^22 kilograms.

That’s 73,500,000,000,000,000,000,000 kilograms. To put that into perspective, a blue whale is around 200 tons. That comes out to 181,437 kilograms. This means that approximately 405,000,000,000,000,000 blue whales same the massive of the Moon. Suffice to say the Moon is heavy. But the Moon is just 1.2% the the earth mass (roughly 6*10^24 kg), so the Moon is in reality super irradiate in the cosmic system of everything.

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Why go the Moon have Zero Acceleration?

We’ve already established that the Moon isn’t speeding up towards Earth, i m sorry is true to a degree. The reason why the Moon isn’t right now on a crash food towards planet is due to the fact that of that is orbit.

It’s known that the Moon orbits approximately the Earth. We’ve put together a simplified diagram of just how orbits occupational below. In summary, the Moon is accelerating towards the Earth, but it additionally has forward momentum perpendicular to its acceleration towards the Earth.

Because these 2 vectors are around equal, the Moon ends up relocating in the circular route outlined ~ above the exact same diagram.


Since one vector is momentum and also the other is acceleration, the Moon will ultimately (over the food of a very long time) prevent orbiting the Earth. Eventually its inert may degeneration until Earth’s gravity is much greater, in which instance the Moon will certainly collide through the Earth. As it stand though, the Moon is actually slowly drifting far from Earth. Part theorize the instead, the Moon is in reality destined to departure Earth’s gravity and drift off into space.

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Of course, before any kind of of this happens, the sunlight will go into its red large phase. As it begins to expand around 5 billion years from now, it will certainly swallow up the terrestrial planets. And the Moon will have the very same unfortunate fate as Earth. Therefore we’ve acquired that going because that us. Which is nice.