Peering into deep space, NASA's James Webb Space Telescope has helped astronomers find places to study gravitational lensing, an effect in which massive objects such as galaxies warp space-time itself, bending and distorting the light of even more distant galaxies behind them. Each distorted arc, ring or multiplied galaxy image acts as a natural cosmic magnifying glass, offering astronomers a powerful tool to look further back into the universe's history.
