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Two galaxies aligned in a way where their gravity acts as a compound lens

(phys.org)
268 points wglb | 1 comments | 16 Nov 24 16:48 UTC | HN request time: 0.212s | source
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wglb ◴[16 Nov 24 16:49 UTC] No.42157343[source]▶
This is seriously cool. One lens galaxy is amazing, but two! (Too bad that this is not steerable.)

Underlying paper: https://arxiv.org/abs/2411.04177

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hinkley ◴[16 Nov 24 19:21 UTC] No.42158524[source]▶
It would be cool if we some day had special days of astronomy where every telescope is turned to galactic eclipses the way they once did for solar eclipses.

The sky is huge and we are moving, so surely some would happen in our lifetimes?

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1. consp ◴[17 Nov 24 10:51 UTC] No.42163363[source]▶
Isn't the idea to use the sun as a lense already enough? The main problem being the focal point at 500+ au.