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Of course if there was enough dust in interstellar space to reflect a laser beam (as happens when we see the traces of glowing beams shone through carbon dioxid
by qubex 6y ago
Of course if there was enough dust in interstellar space to reflect a laser beam (as happens when we see the traces of glowing beams shone through carbon dioxide gas) we could just prove the heavens with laser beams until suddenly we saw a beam bend. Unfortunately that isn’t the case so we have to fling stuff at it and see if they veer off track.
- Sharlin 6y agoWe do have microlensing though: https://en.wikipedia.org/wiki/Gravitational_microlensing https://en.wikipedia.org/wiki/Gravitational_microlensing
- robocat 6y agoYou can’t easily linearly scan space for a moving target, among other show-stopper problems.
- qubex 6y agoNo, but since using satellites on trajectories you hope will be perturbed is essentially ‘scanning’ anyway, it would be preferable to do it with a light-beam than with physical objects.