Pursuing the Invisible with Einstein's Lens

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Hubble Space Telescope image of galaxies in the cluster known as Abell 2218 which acts here as gravitational lens. The cluster is so massive and so compact that its gravity bends and focuses the light from galaxies that lie behind it distorting them ...
Hubble Space Telescope image of galaxies in the cluster known as Abell 2218, which acts here as gravitational lens. The cluster is so massive and so compact that its gravity bends and focuses the light from galaxies that lie behind it, distorting them into long faint arcs.

"I could not go abroad in snow, it would settle on me and expose me. Rain, too, would make me a watery outline, a glistening surface of a man -- a bubble."
- from "The Invisible Man" by H.G. Wells


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