HAD

This Month in Astronomical History: June

7 May 2019
This column from the AAS Historical Astronomy Division focuses on the the Greek astronomer Eratosthenes and his renowned calculation of the circumference of the Earth.

This Month in Astronomical History: May

7 May 2019
This column from the AAS Historical Astronomy Division focuses on the May 1919 eclipse expeditions that confirmed a key prediction of general relativity and made Einstein famous.

This Month in Astronomical History: April

8 Apr 2019
In this column from the AAS Historical Astronomy Division, we focus on the satellite BeppoSAX, which observed the X-ray sky from April 1996 to April 2002 and reentered Earth's atmosphere in April 2003.