3 ms·
So, a pulsar would do the trick? How far back do we simulate movement of milky way and all galaxies around to say for sure they come from an 'empty' place? I th
by saiya-jin 3y ago
So, a pulsar would do the trick? How far back do we simulate movement of milky way and all galaxies around to say for sure they come from an 'empty' place? I think our local supercluster look quite a bit different say 1 billion years ago
- eesmith 3y agoThe particle is traveling at a whisker under the speed of light. If I read things correctly, it's only a few light-days behind what the light would be after 1 billion years. So what we see should (as we we understand it) look like the conditions where/when it achieved its tremendous speed.
- saiya-jin 3y agoThank you for the explanation it makes sense (I wonder how much time that particle 'experienced'), apart from that obvious mystery of where it came from