More work is needed to confirm these findings, which are contrary to earlier telescope observations of condensed oxygen in Europa’s ice, indicating a higher oxygen concentration
The James Webb telescope just detected carbon dioxide on this Galilean satellite, one of the nearby worlds studied for extraterrestrial life
Four planetary probes were launched in the 1970s, carrying information about Earth. This was in case – in the very distant future – they were to fall into the hands of an extraterrestrial civilization
The former NASA chief scientist has left the planet five times, and has come to spend more than eight hours floating alone in space
Dubbed Juice, the robotic explorer set off on an eight-year journey Friday from French Guiana in South America, launching atop an Ariane rocket
