Gravitational lensing is one of the most useful ways to view undiscovered galaxies millions of trillions of light years away which are unseen by any telescope due to being unimaginably dim to see. Here are more examples which NASA has found of galaxies, acting as a lens to bring out unseen galaxies behind them.
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| Image Credit: NASA, ESA, and F. Courbin (EPFL, Switzerland) |
In these three galaxies, it has been seen that most of the lensing is due to the quasars located at the center of each of them. Each super massive black hole is blasting out giant gas jets from the center of the galaxy causing the center to shine brighter than the entire galaxy. The study shows that galaxies like these are rare to find due to the characteristics stated in the previous line; however, Hubble will now look for more quasar lit galaxies in search of gravitational lensing of other galaxies located behind the host galaxy.
What if to E.T., the Milky Way is lensing a galaxy we have yet to discover or study all the time? It could be possible that galaxies we looked at why lens are starring right back at us as we curve around some other unknown cluster of galaxies.
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