Cygnus X-1: Where did it come from and where did it go?
Cygnus X-1 is a binary star system, consisting of a blue supergiant and a neutron star. It's about 6,500 light-years from Earth, and it was the first object to be identified as such. Cygnus X-1 is also one of the most studied objects in astronomy. A recent study by an international team of researchers has revealed that the system has been gradually fading since its discovery in 1964. The team believes that Cygnus X-1 will eventually become too faint for us to observe.
Cygnus X-1 is a black hole that’s not entirely black.
Cygnus X-1 is a black hole that’s not entirely black. It’s actually a binary system, which means it consists of two objects, one of which is a black hole. The other object is a neutron star, which is an object that has collapsed in on itself so many times that it has lost all of its electrons and protons. The result is a ball of neutrons that has the same mass as our sun but only the size of a city.
Cygnus X-1 is a binary star system.
Cygnus X-1 is a binary star system, meaning that there are two stars in the system. The primary star is a blue supergiant and the secondary star is a red dwarf. The two stars orbit each other every 5.6 years. This binary star system was discovered in 1964 by astronomers at the University of California Santa Cruz.
Cygnus X-1 is the largest and brightest X-ray source in the sky.
Cygnus X-1 is a binary star system, which is a system of two stars orbiting one another. One of the stars is a black hole with a mass of about 10 times that of the Sun. The other star is a blue supergiant, which is an extremely massive star. A black hole can't be seen because it doesn't emit any light, but it can be seen by its effect on nearby objects. Cygnus X-1 was first discovered in 1964 by astronomers studying X-ray emissions from the Milky Way galaxy. It was not until 1979 that astronomers realized that Cygnus X-1 was actually a binary star system.
Cygnus X-1 is a black hole that’s not entirely black.
Cygnus X-1 is a black hole that's not entirely black. It's an "accretion disk" (a gas cloud) that has been pulled in by the black hole. As the gas cloud gets closer to the black hole, it heats up and starts to glow. The brightness of the glow depends on how fast the gas is spinning. If it's spinning really fast, it will emit more light.
