3 ms·
Orbit size and speed have no relation to planetary density by themselves. If we knew the total kinetic energy of the planet, then they would, but we don't.
by Tossrock 15y ago
Orbit size and speed have no relation to planetary density by themselves. If we knew the total kinetic energy of the planet, then they would, but we don't.
- nickpinkston 15y agoSo you're saying that we can't get the weight using it's speed, orbit radius and planet volume? I think I remember this question on my Physics I test! http://en.wikipedia.org/wiki/Centripetal_force#Formula http://en.wikipedia.org/wiki/Centripetal_force#Formula We have: r, v, m-star, f-star - so m-planet follows right?
- Tossrock 15y agoWe don't have "f-star"; the centripedal force (or the force of gravity in this case) is the product of both the mass of the star and the mass of the planet, which we don't have.