5 ms·
At trillions of times the mass of water, I'd have to suspect that it has its own gravity. A one kilometer cube starts to approach earth mass, if you just ballp
by beesKneesMan 8y ago
At trillions of times the mass of water, I'd have to suspect that it has its own gravity.
A one kilometer cube starts to approach earth mass, if you just ballpark values based on the orders of magnitude relative to water.
- kabdib 8y agoIIRC a sphere of neutronium about 150M in diameter is equivalent to the mass of the Earth. Of course, if you had one of those spheres it'd blow up in your face and ruin your day. Probably wreck a bunch of the solar system, too.
- whatshisface 8y agoEvery object has its own gravity, no matter the shape or size[0]. This is taken advantage of in sensitive experiments that measure the gravitational attraction between human-scale objects[1]. The experiments are done to determine Newton's constant, G, the constant governing the strength of gravity. [0] Even massless particles like photons have gravity, as it's actually energy that bends space and not rest mass. [1] https://en.wikipedia.org/wiki/Cavendish_experiment https://en.wikipedia.org/wiki/Cavendish_experiment
- deleted 8y ago[deleted]
- captain0bvious 8y agoWow dude. That's like really helpful. Objects have gravity. Wow. Something else. If you weren't here, in this thread, right now, to sound the alarm, we'd all be lost. Thank you for your service. Incredible.
- xabuq 8y agoWow, citations too! You're special. Objects have gravity. A thread about neutron stars, and you came in here to tell us that. Incredible.
- stan_rogers 8y agoNote that demonstrating gravitational attraction with an apparatus similar to Cavendish's doesn't need to be nearly as precise or delicate - the hard part wasn't showing gravitational attraction, it was measuring it so that the mass of the Earth (and thus other celestial bodies) could be determined. The simpler form of the experiment that merely shows that bodies attract one another can be done in your living room (modulo pets and children). Several of the anti-Flat-Earth YouTubers have done it, the point being to enable flattards to do it for themselves (should they be so inclined) so they're not relying on reptoid NASA Illuminati shills and their propaganda.