5 ms·
How do they know exact sizes of the 2 black holes, and the remaining size also? Seems like they say it as 100% truth, which maybe it is, but my uneducated mind
by ssijak 9y ago
How do they know exact sizes of the 2 black holes, and the remaining size also? Seems like they say it as 100% truth, which maybe it is, but my uneducated mind cannot think how they could calculate that. Only those sizes fit in the mathematical model of the gravitational waves compared to the observations?
- MAGZine 9y agoIt is trivial to obtain the size of objects, so long as you have some information about a satellite orbiting it. It's how we get the mass of many interstellar objects, and it's how we know that dark matter exists. http://astro.physics.uiowa.edu/ITU/glossary/keplers-third-law/ http://astro.physics.uiowa.edu/ITU/glossary/keplers-third-la...
- 21 9y agoI imagine is like seeing a light source from two vantage points. Using the timing difference you can triangulate a distance. Using the computed distance and received brightness you can compute source brightness. Using source brightness you can compute source power.