All About Space issue 129 uncovers astonishing facts about our solar system, the anatomy of white dwarf stars and a mystery surrounding weird filaments in the Milky Way.
have burnt themselves out, they shed their skins to leave behind a dead core. These stellar remnants are white dwarfs, pint-sized objects that are quite unlike any other. No bigger than Earth in diameter, they're white-hot and slowly cooling as they fade away over billions and trillions of years.
Eventually, they will become stellar ghosts — mere shadows of their former selves. 97% of stars in the universe will one day turn into . In the cosmos' far future you would be hard-pressed to find a star that's burning with the aid of fusion, as the universe becomes littered with stellar corpses. In 1984, astronomer Farhad Yusef-Zadeh was observing the night sky when he spotted something rather unusual that stopped him in his tracks. He had been working on his PhD at Columbia University, attempting to figure out the nature of compact sources.
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