#astronomy #cosmology #GravitationalLensing #DarkMatter #Hubble An article published in the journal "The Monthly Notices of the Royal Astronomical Society" reports a solution to an astronomical mystery involving two #galaxies that appeared to be mirror images of each other and turned out to be two images of the same galaxy doubled by a gravitational lens.
https://english.tachyonbeam.com/2021/10/10/the-mystery-of-hamiltons-object-offers-clues-to-gravitational-lenses-and-dark-matter/