The fourth brightest star in the sky and the brightest star in the constellation Boötes, approximately 36 light-years from Earth.
ETYMOLOGY:
Middle English, from Latin Arctrus, from Greek Arktouros : arktos, bear; see tko- in Appendix I + ouros, guard (from its position behind Ursa Major); see wer-3 in Appendix I.
ärk-t
r
s, -ty
rus, from Greek Arktouros : arktos, bear; see 
tko- in Appendix I + ouros, guard (from its position behind Ursa Major); see wer-3 in Appendix I.
