NASA’s James Webb Space Telescope has found a previously unknown moon orbiting Uranus. NASA announced the discovery on Tuesday, adding that the moon was first spotted on Feb. 2. Scientists estimate that the newly discovered moon is about six miles in diameter.

"This object was spotted in a series of 10 40-minute long-exposure images captured by the Near-Infrared Camera (NIRCam)," Maryame El Moutamid, lead scientist at the Southwest Research Institute’s Sol...