Preibisch, T., Mamajek, E. The Nearest OB Association: Scorpius-Centaurus (Sco OB2). Handbook of Star-Forming Regions. 2008, 2: 0. Bibcode:2008hsf2.book..235P. arXiv:0809.0407.
"We likewise observed...due south by compass, a constellation of six large bright stars, in the figure of a cross in this form...we conjectured this to be the southern chariot, but could not expect to observe the principal star, as we had not yet lost sight of the north pole." A. Cadamosto Navigatione, written c.1465(1550 Ramusio edition, p.116r (页面存档备份,存于互联网档案馆); 1811 Kerr edition p.244 (页面存档备份,存于互联网档案馆))
Preibisch, T., Mamajek, E. The Nearest OB Association: Scorpius-Centaurus (Sco OB2). Handbook of Star-Forming Regions. 2008, 2: 0. Bibcode:2008hsf2.book..235P. arXiv:0809.0407.
"We likewise observed...due south by compass, a constellation of six large bright stars, in the figure of a cross in this form...we conjectured this to be the southern chariot, but could not expect to observe the principal star, as we had not yet lost sight of the north pole." A. Cadamosto Navigatione, written c.1465(1550 Ramusio edition, p.116r (页面存档备份,存于互联网档案馆); 1811 Kerr edition p.244 (页面存档备份,存于互联网档案馆))