Summary:
- The James Webb Space Telescope has discovered a new exoplanet orbiting Proxima Centauri, the closest star to our Sun.
- This exoplanet, named Proxima d, is a rocky planet about the size of Earth and is located in the habitable zone of its host star, meaning it could potentially support liquid water on its surface.
- The discovery of Proxima d is significant as it provides scientists with a new opportunity to study the atmosphere and potential habitability of an Earth-sized planet in the solar system's backyard.