The brightness of stars as observed from Earth is measured in terms of apparent magnitude, with lower magnitudes indicating brighter stars.
Sirius (Alpha Canis Majoris): Apparent Magnitude: -1.46 Constellation: Canis Major
Canopus (Alpha Carinae): Apparent Magnitude: -0.72 Constellation: Carina
Alpha Centauri (Triple Star System): Apparent Magnitude: -0.27 (combined) Constellation: Centaurus
Arcturus (Alpha Boötis): Apparent Magnitude: -0.05 Constellation: Boötes
Vega (Alpha Lyrae): Apparent Magnitude: 0.03 Constellation: Lyra
Capella (Alpha Aurigae): Apparent Magnitude: 0.08 Constellation: Auriga
Rigel (Beta Orionis): Apparent Magnitude: 0.12 Constellation: Orion
Procyon (Alpha Canis Minoris): Apparent Magnitude: 0.34 Constellation: Canis Minor
Achernar (Alpha Eridani): Apparent Magnitude: 0.46 Constellation: Eridanus
Betelgeuse (Alpha Orionis): Apparent Magnitude: 0.50 Constellation: Orion