# Your Weight on Each Planet of the Solar System [Pic]

I’m so sorry.

[Source: Fake Science]

## 11 Responses to Your Weight on Each Planet of the Solar System [Pic]

1. What?

Mercury and Mars have about 0.3g at the surface…

• Yeah, but you would suffocate/burn/freeze, depending on the planet.

2. Daniel says:

Kilograms is the SI unit for mass, not force due to gravity.

So the answer to all planets except Pluto and Earth of them should be: Still your normal weight. But you’d die before weighing yourself.

The answer to Pluto should be: It’s not a planet. But you’d still be your normal weight yet die before weighing yourself.

• vince says:

weight and mass are two different things. You would have the same mass, but you would weigh differently.

• Daniel says:

Depends on whether you use ‘weight’ to refer to kilograms or Newtons.

Ask most people what they weigh, and they’ll give you an answer in kilograms (or maybe pounds, if you’re in the States).

Reporting weight in Newtons is technically accurate but isn’t common usage.

I weigh 83.4kg. I would continue to ‘weight’ 83.4kg regardless of my gravitational frame of reference.

On Earth, my body exerts (83.4 kg) x (9.8 m/s²) = 817.3 N

A couple of resources online cite the surface gravity of mars as being around 3.72 m/s², so if we use that figure and plug it in:

On Mars, my body exerts (83.4 kg) x (3.72 m/s²) = 310.24 N

If ‘weight’ means Newtons, then yes, I will ‘weigh’ less on the surface of Mars than on the surface of Earth.

But if we use weight consistently with the common usage to refer to how many kilograms I weight, then my weight is the same in both reference frames.

• Geeks are Sexy is an American website, and we measure weight, not mass, and we do it in pounds. I have always found it amusing that people convert from pounds into kg, but really, it’s actually measuring two different things. For us, it changes if we go to a different planet.

• Daniel says:

@Beth

It’s still not so odd/amusing that people converts pounds to kilograms. The United States has legally defined one pound (mass) as being directly based on the kilogram since 1893.

That said, I hadn’t realized (yay, learned something today!) that in the US there is a distinction between pound (mass) and pound (force). One pound (force) being defined as exactly the amount of force exerted by one pound (mass) under standard gravity. The 1:1 ratio between the units means that the number stays the same even when swapping between completely different units, which is clearly how the historic ambiguity between mass and weight units in the US has been preserved into the modern era.

In short: The ambiguity of the term ‘pound’ when used without a specifier just makes the US customary units even nuttier than I already thought they were. ^_^

The definition of pound-force as being specifically based on standard gravity means that pound-force would *technically* doesn’t change depending on the planet you’re on either. But putting my foot down about that would be getting a bit facetious even by my anally retentive standards regarding measurement. :p

3. Cody says:

1) Pounds in the U.S. are actually a force. There’s pound-force and pound-mass, but Americans (mostly unknowingly) use the force unit. You British people just use the wrong word :p

2) When the picture is about your weight on different planets the obvious implication is that it’s talking about the actual definition, so you arguing that some people use weight when they mean mass is ridiculous.

4. Sean says:

Pluto isn’t a planet.

• I really hope you made that statement in an attempt to detour the current conversation and not because you didn’t actually read the picture.