Black holes are invisible 'objects' in space, where gravity is so great that it draws everything inside, including light.
The dead star body glows like a giant bubble floating in the darkness of the universe.
Fluorine in toothpaste products can be formed billions of years ago from dead stars.
The US Aeronautics and Space Agency (NASA) is focusing its attention on a star that may soon become a supernova more than 20,000 light years from Earth.
European astronomers have announced the image of a star about 3,300 light-years from Earth, emitting the last bright light before disappearing forever.
Space telescope Kepler and experts of the American Palomar Observatory found the super-solid white dwarf died in a binary star system.
The Hubble Space Telescope of the US Aeronautics Agency (NASA) photographed the debris of a giant star that exploded 8,000 years ago.