As an expert in astronomy, I can tell you that Procyon is a star, specifically a binary star system, located in the constellation Canis Minor. It is often referred to as the eighth brightest star in the night sky and is a part of a system that includes a white dwarf.

Procyon A, the primary star, is a white dwarf, which is the remnant of a low- to medium-mass star that has exhausted its nuclear fuel. White dwarfs are incredibly dense and are composed mostly of carbon and oxygen, although the outer layers can contain other elements that were present in the original star.

Procyon B, the companion star, is also a white dwarf. It is not visible to the naked eye but can be observed with the aid of a telescope. Both stars are believed to be about 1.4 billion years old and are relatively close to our solar system, at a distance of approximately 11.46 light-years.

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Procyon is a binary star system in Canis Minor (the lesser dog), which is a constellation in the Northern Hemisphere. It is among the 10 brightest stars from Earth's sky. The system is made up of Procyon A (a main sequence star) and Procyon B (a much smaller white dwarf.)read more >>