4 ms·
I don't think you'll find 0.2c relative velocities except near very energetic phenomena, especially not of things that are too small to easily see coming.
by tgflynn 11y ago
I don't think you'll find 0.2c relative velocities except near very energetic phenomena, especially not of things that are too small to easily see coming.
- skykooler 11y agoCosmic rays are far too small to easily see coming, and we get those all the time here.
- tgflynn 11y agoI think it should be clear from the context that this discussion was about macroscopic objects. Cosmic rays don't carry the kinetic energy equivalent of a medium size nuke.
- deleted 11y ago[deleted]