are binary stars the brightest stars
Planet's revolve around stars because of gravity. However, gravity is not restricted to only act between large and small bodies, stars can revolve around stars as well. In fact, 85% of the stars in the Milky Way galaxy are not single stars, like the Sun, but multiple star systems, binaries or triplets. Cygnus has an easy-to-recognize shape, that of a cross, and the constellation is also known as the Northern Cross. The brightest star in Cygnus, called Deneb, marks the head of the Cross or the Tail of the Swan. Albireo marks the base of the Cross or the Head of Cygnus. The constellation Cygnus the Swan. The bright star Deneb is in the Tail of Cygnus, while Albireo is at the Head of the Swan. Binary Stars. Spica. Spica, Alpha Virginis, is the brightest star in the southern constellation Virgo and the 16th brightest star in the sky. It is a blue subgiant star located at a distance of 262 light years from Earth. Spica is really a close binary star system. The brighter star of a visual binary is the primary star, and the dimmer is considered the secondary. In some publications (especially older ones), a faint secondary is called the comes (plural comites; companion). If the stars are the same brightness, the discoverer designation for the primary is customarily accepted. The Top Ten. Arcturus is the brightest star in the northern celestial hemisphere. The name of the star derives from Ancient Greek and means Guardian of the Bear or “watcher, guardian. It is a relatively close star at only 36.7 light-years (11.26 parsecs) from Earth and is a red giant about 110 times brighter than the Sun. This is a list of the brightest naked eye stars to +2.50 magnitude, as determined by their maximum, total or combined apparent visual magnitudes as seen from Earth. Although several of the brightest stars are also known close binary or multiple star systems, they do appear to the naked eye as single stars. The given list below combines/adds the magnitudes of bright individual components. Proper names in this list are those approved by the Working Group on Star Names. Capella, also known as Alpha Aurigae or the Goat Star, is the brightest star in Auriga and the sixth brightest star in the sky. The only stars in the northern celestial hemisphere brighter than Capella are Arcturus in Boötes constellation and Vega in Lyra. If two stars orbit each other at large separations, they evolve independently and are called a wide pair. If the two stars are close enough to transfer matter by tidal forces, then they are called a close or contact pair. Binary stars obey Kepler's Laws of Planetary Motion, of which there are three. 1st law (law of elliptic orbits): Each star or planet moves in an elliptical orbit with the center of mass at one focus. Another nearby visual binary system is Sirius in the constellation Canis Major. Of the two stars, α CMa A is an A1 V star, the brightest in the night sky with an apparent magnitude of -1.43. Its companion star, α CMa B is a much dimmer star. In fact it is a white dwarf with an apparent magnitude of 8.44. Hubble image of the Sirius binary system, in which Sirius B can be clearly distinguished (lower left) A binary star is a star system consisting of two stars orbiting around their common barycenter. Systems of two or more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light, and are then revealed as multiple by other means.
Yes, Binary Stars. Spica. Spica, Alpha Virginis, is the brightest star in the southern constellation Virgo.