Señor Bigote wrote:Ok so get this: Someone put a pound of bricks and a pound of feathers into space. Which one weighs more?
Of course, you'd be tempted to say neither since weight is based on the influence of gravity, generally insignificant in space. That's just it though: it's insignificant, not nonexistent.
Gravitational force, measured as weight, is still present relative to any mass and is inversely proportional to distance d between the objects squared (re: Newton's Law of Universal Gravitation). In fact, even if one were to ignore weight relative to other masses (planets/suns/etc.) as insignificant, they still have weights relative to each other that are equal and opposite in direction.
So, assuming they're both equally distant from all masses? They weigh the same. Same case if you ignore all other masses.
If one is a bit closer to, say, the sun (since it's the most massive thing nearby), then that weighs more by a factor of how much closer it is squared.
Thank you for coming to my TED Talk.