- Arcturus is the brightest star in the northern constellation of Boötes. With an apparent visual magnitude of −0.05, it is the fourth-brightest star in the night sky, and the brightest in the northern celestial hemisphere. The name Arcturus originated from ancient Greece; it was then cataloged as α Boötis by Johann Bayer in 1603, which is Latinized to Alpha Boötis. Arcturus forms one corner of the Spring Triangle asterism.
- Angola - The World Factbook (cia.gov)
Bantu-speaking people settled in the area now called Angola in 6th century A.D.; by the 10th century various Bantu groups had established kingdoms, of which Kongo became the most powerful. From the late-14th to the mid-19th century, a Kingdom of Kongo stretched across central Africa from present-day northern Angola into the current Congo republics.