Iceberg A-81, about 1,550 square kilometers in size, has drifted from Antarctica's Brunt Ice Shelf to the edge of South Georgia's shallow shelf, where satellite images show it slowing.
NASA's Swift observatory has ended science operations after atmospheric drag pulled it below 171 miles. A commercial boost attempt failed, and re-entry is expected within weeks.
Why solar eclipses happen only a few times a year, what observers see from first contact to totality, and NASA's dates for the next total solar eclipses in 2027, 2028 and 2030.
NASA has put more than 800 gigabytes of Artemis II lunar data in its public archive, including 11,000-plus images, and a preliminary report on impact flashes seen by the crew.
