外部連結
- [http://aladin.u-strasbg.fr/AladinPreview?-c=15+01+56.7623%2B40+23+26.036&ident=NSV++6898&submit=Aladin+previewer Image Beta Boötis]
- [https://web.archive.org/web/20080926185552/http://www.purplehell.com/riddletools/stars.htm The Constellations and Named Stars]
- [http://stars.astro.illinois.edu/sow/nekkar.html Nekkar at University of Illinois]
评论 (0)