Where did Edmond Halley sail to study the stars of the southern hemisphere?

St. Helena in the South Atlantic

Explanation:

The young astronomer gave up his studies in 1676 and sailed to St. Helena in the South Atlantic where he catalogued 341 stars in the Southern Hemisphere and discovered a star cluster in Centaurus.

the ss was the main organization responsible for the genocidal murder of around six million people of european ethnic minorities, essentially jews, in the holocaust. the members of all its branches committed war crimes and crimes against humanity during the second world war (1939-1945). likewise, the ss were involved in commercial enterprises and exploited the inmates of the concentration camps as slave laborers.

the tortures and assassinations committed by the ss were the result of an ideology developed long before the armed conflict, this ideology was based on the racial supremacy of the germans over the rest.