Talking about dark matter and concepts that make us go beyond the tangible world and the physics of the MRU is something exciting, and even more so if the news in this field is accompanied by images. It is one of the last images that the long-lived Hubble telescope still gives (in its supposed year of retirement, which perhaps does not end up being), showing us the visual effect of gravitational lenses.
The deflection of light is something that was predicted centuries ago and that Einstein “confirmed wrong”. Thanks to modern telescopes we can observe this phenomenon when a luminous object is located behind a mass accumulation (in the line of sight of the telescope), hence in this case Hubble has captured it in the Abell 2813 galaxy cluster.
