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I used to think about this: Would it be possible to find a configuration of galaxies with enough mass to bend light from one point on earth back to another poin
by dynofuz 12y ago
I used to think about this: Would it be possible to find a configuration of galaxies with enough mass to bend light from one point on earth back to another point on earth? If we could do that, we actually look at an older timestamp of earth.
Yes, we'd need a reeeeally powerful telescope, but maybe we could find that in another configuration of galaxies as well.
- thret 12y agoYes, it is possible, but we'd need better telescopes. This post has a pretty good analysis: http://rein.pk/gravitational-lensing-to-observe-ancient-earth/ http://rein.pk/gravitational-lensing-to-observe-ancient-eart...