Arcturus, the fourth brightest star in the sky in the constellation Bootes. Its an orange giant star which is cooler than our Sun, but radiates much of its energy in the infrared spectrum. It's also much larger with about 25 times the diameter. To find it in the sky, follow the arc of the handle of the big dipper.
When you're outside at night right now, look up and try to find this! Shining prominently from March through May is the Spring Triangle: Arcturus is part of the kite-shaped constellation Bootes, Denebola is the tail of the constellation Leo, and Spica is in the constellation Virgo. #ILoveAstronomy
Arcturus, in the constellation Bootes, is the brightest star north of the celestial equator. The three brightest stars of the sky – Sirius, Canopus and Alpha Centauri – are south of the celestial equator. Arcturus is only marginally brighter than the northern hemisphere’s second-brightest star, Vega.
Alpha (α) Bootes, Arcturus, is a golden red star situated on the left knee of the Herdsman, the 4th brightest in the sky. Arcturus has been an object of the highest interest and admiration to all observant mankind from the earliest times, and doubtless was one of the first stars to be named; for from Hesiod's day to the present it thus appears throughout all literature, although often confounded with the Greater Bear (Ursa Major).
Finding Algol in fall and winter sky is easy. This map shows the sky facing northeast around 7 p.m. local time. Locate the bright star Capella in Auriga and the Pleiades or Seven Sisters star cluster then form a triangle with Perseus' brightest star Mirfak. Algol is the next brightest star a few degrees to the right or south of Mirfak. Source: Stellarium
Capella (α Aurigae, α Aur, Alpha Aurigae, Alpha Aur) is the brightest star in the constellation Auriga, the eleventh brightest star in the night sky and the third brightest star in the northern celestial hemisphere, after Arcturus and Vega.