Should we classify planets by weight?
- Ronald 7Lv 71 month ago
Weight my friend is a concept easily construed as Mass
On Earth we have Mass
We also have an extra force added on to that, called Gravity
Gravity plus Mass equals weight
I am 87 Kg
In the ISS I would still have the same Mass but without Gravity
I would be in Orbit, a state of falling, but at a Velocity of Orbit that Keeps me at the same Altitude constantly
In order to Change any of that we need external force
To slow up or speed up
Less Velocity will lower our Altitude, more, the opposite
It is Newton's Third Law of Motion at work
Anyway I diverge
In orbit, bodies are considered weightless
So Planets have Mass
They would only have weight if you could add gravity to weightless objects
So it doesn't make sense
- AlexanderLv 71 month ago
There is no "weight" in zero gravity. Only mass.
- Tom SLv 71 month ago
Planets by definition need to be in orbit of a star, objects in orbit are in a state of free-fall, so weightless. Planets are weightless.
- ANDRE LLv 71 month ago
You do know that mass and weight aren't the same thing, right ?
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- nineteenthlyLv 71 month ago
The weight of a planet is not its mass but a function of its diameter and mass. It would be entirely feasible for a "puffy planet" orbiting close to its star to have the same weight as a rocky planet further out. They would have very little else in common.
- Anonymous1 month ago
Sure. Why not. Break out the scale.
- Campbell HaydenLv 71 month ago
No, we should not, since the mass
of a planet already gives us a guesstimate of its weight.
- LônLv 71 month ago
No, by mass. .
- ?Lv 71 month ago
And how exactly do we weigh them?
- megalomaniacLv 71 month ago
We more or less already do . That's why Pluto was a planet, then wasn't (because it was considered too small), and then was again (because people were attached to it and complained). There are thousands, maybe millions, of objects orbiting our Sun, we just call the large ones "planets".