Discovered in 2015, K2-18b is about 2.6 times larger and 8.6 times more massive than Earth. Its temperature is very similar to Earth's, but the planet orbits so quickly that a year on K2-18b lasts just 33 day
U.S. experts react to footage of Kh-101 cluster missile strike on Chernivtsi and raise alarms over its range and elusive tech