Earth has acquired a second "mini-moon" about the size of a car, according to astronomers who spotted the object circling our planet.

Iran said it "successfully" launched a satellite Sunday but failed to put it into orbit, in a blow to its space program that the U.S. alleges is a cover for missile development.

Chinese researchers investigating the animal origin of the deadly coronavirus outbreak in China said Friday the endangered pangolin may be the "missing link" between bats and humans, but other scientists said the search may not be over.

NASA's Christina Koch returned to Earth safely on Thursday after  shattering the spaceflight record for female astronauts with a stay of almost 11 months aboard the International Space Station.

A massive, decade-long study sequencing the genomes of dozens of cancers has revealed the secrets of how tumors form and may pave the way for better and more targeted treatment. 

Europe's physics lab CERN on Wednesday said it had stopped using a Facebook team-chat application because of concerns about handing over data to the U.S. tech giant.

A huge telescope built on the peak of a Hawaiian island has produced pictures of the Sun's surface in unprecedented detail, revealing boiling plasma cells the size of Texas. 

NASA said Monday that its planet hunter satellite TESS had discovered an Earth-sized world within the habitable range of its star, which could allow the presence of liquid water.

A Chinese court on Monday sentenced the doctor who claimed to be behind the world's first gene-edited babies to three years in prison for illegal medical practice, state media reported.

NASA's Mars 2020 rover will head off for the Red Planet next year. But like Voyager, Galileo and Cassini before it, the mission's epic journey began in a "clean room" in California.