The Moon is back in its waning phase.

You can probably conjure this vision of the moon—hold the image in your mind and transmit it off this planet and onto our shining opalescent companion. Peaks in the sun? I’ve seen that. This week, we ...

The highly anticipated lunar flyby of the Artemis II mission will take four astronauts on a pioneering survey of the moon Monday, including the rarely glimpsed lunar far side, which always faces away ...