Definition
Gravitational lensing is a phenomenon where the gravity of a massive object bends and magnifies the light from objects behind it. Think of it as a cosmic magnifying glass 🔍. The massive object acts as a lens, distorting the image of the background object. This effect can make distant galaxies appear brighter and larger. Gravitational lensing provides valuable insights into the distribution of mass in the universe. It also helps astronomers study objects that would otherwise be too faint to observe.