How Astronomers Find Planets That Never Give Off a Single Photon of Light
Planets don't shine on their own, yet astronomers have already confirmed more than 6,000 beyond our solar system. Some are found when a foreground star's gravity briefly bends and brightens the light of a star behind it, revealing a hidden world in the distortion. The Roman Space Telescope, with a field of view 100 times wider than Hubble's, is about to make this technique the main event.