A pair of quasars that existed when the universe was only 3 billion years old has been spotted by the Hubble Space Telescope.

Nearly 4.5 million years ago, two large, hot stars brushed tantalizingly close to Earth's sun. They left behind a trace in ...

NASA confirms interstellar visitor 3I/ATLAS is a natural comet, not an alien artefact. Its nickel and CO2-rich chemistry suggests it's pre-Sun matter, offering unique insights into ancient star ...

Scientists have detected tiny lightning bolts on Mars for the first time — they were found discharging around NASA's ...