Watch the moon phases and libration for 2024, as seen from Earth's Northern Hemisphere, in this time-lapsed animation that is set at hourly intervals. Video credit: NASA’s Goddard Space Flight Center ...

As the Artemis II astronauts prepare for separate appearances hosted by President Donald Trump and Jimmy Fallon, revisit the ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...