Astronomy
Gravitational Lensing
Quick fact
Gravitational lensing allowed the Hubble Space Telescope to capture the most distant galaxy ever observed, GN-z11, by magnifying its light over 13.4 billion years.
Why this is interesting
You've seen a glass lens bend light to focus an image — but what if an entire galaxy could do the same? Gravitational lensing turns galaxies and galaxy clusters into nature's most powerful telescopes.