Arcturus (redirected from Alpha Boötis)

Arc·tu·rus  (ärk-trs, -tyr-)

n.

The fourth brightest star in the sky and the brightest star in the constellation Boötes, approximately 36 light-years from Earth.

---

[Middle English, from Latin Arctrus, from Greek Arktouros : arktos, bear; see tko- in Indo-European roots + ouros, guard (from its position behind Ursa Major); see wer-³ in Indo-European roots.]

---

Arcturus [ɑːkˈtjʊərəs]

n

(Astronomy & Space / Celestial Objects) the brightest star in the constellation Boötes: a red giant. Visual magnitude: -0.4; spectral type: K2III; distance: 37 light years

[from Latin, from Greek Arktouros, from arktos bear + ouros guard, keeper]

Arcturian  adj

---

Arcturus  (ärk-trs)

A giant star in the constellation Boötes. It is the brightest star in the Northern Hemisphere and the fourth brightest star in the sky, with an apparent magnitude of 0.00. Scientific name: Alpha Boötes.

Thesaurus

Noun

1.

Arcturus - the 4th brightest star and the brightest star in the constellation Bootes; 36 light-years from Earth Bootes - a constellation in the northern hemisphere near Ursa Major