gravitational lens
Scientists Want to Use Dark Matter 'Lenses' to Observe Far Reaches of the Universe
Dark matter lenses, which distort and amplify light from background objects, may be more abundant in galaxy clusters than expected.
Scientists See Trippy Quadrupled Black Hole While Peering Through a Galaxy
Using another galaxy as a telescope created a trippy quadrupling effect in a rare image of an exploding black hole from the early universe.
Mystery Gravitational Lens Hints at Possible Primordial Black Holes, Dark Matter
At the very least, the new discovery offers a novel way of magnifying the distant cosmos.
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