- #1
arivero
Gold Member
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Our Earth orbit around the sun (and around the galaxy) can be considered a point when looking at other galaxies. So time ago I wondered how was that we assume we know a 3D-distribution of galaxies without having a real stereoscopic view of it.
I know, there is doppler. But if one galaxy is behind another, we will see only the doppler of the first one, will we?
I know, there is doppler. But if one galaxy is behind another, we will see only the doppler of the first one, will we?