This is not the case. No matter how far out in space one gets, there is always gravity, and where there is gravity, there is weight. In a solar system, the weight of a planet is determined by its mass, the mass of the sun it orbits, and the distance between the planet and its sun -- the gravity the sun exerts on the planet, in other words.

However, for the sake of argument, let's set that aside and assume that there is, in fact, no weight in space. There is still mass and momentum, which are quantifiable, physical properties. The Earth, for instance, is a 5.9736 × 10^24 kg mass traveling at, on average, 107,218 kilometers per hour -- which makes for an unbelievable amount of angular momentum to deal with: 2.663 x 10^40 Newton meter seconds, which is roughly 24 x 10^40 pound force inch seconds or roughly 12 x 10^37 ton force inch seconds: 120,000,000,000,000,000,000,000,000,000,000,000,000 tons force per inch per second.

Catch a basketball tossed by your young cousin. Not very difficult. Now catch a basketball shot out of a high-powered canon (or whatever device) that sends it to you at 107,217 kilometers per hour -- you won't be able to catch it. It's just too much momentum, too much force, for you to contend with. Even if you were durable enough to take the hit, you wouldn't have strength enough to stand up to it.

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