black holes

  • Nesting Doll Stars Proposed as Solution to General Relativity

    Nesting Doll Stars Proposed as Solution to General Relativity

    If you asked an astrophysicist what is yet to be discovered in the universe, there’s a good chance they’d paraphrase Donald Rumsfeld: It’s full of known unknowns. Besides the regular matter and energy we know and love, the universe is also composed of two big mysteries: dark energy and dark matter. Theoretical astrophysicists aim to…


  • Why Do Black Holes Twinkle?

    Why Do Black Holes Twinkle?

    Black holes are bizarre things, even by the standards of astronomers. Their mass is so great, it bends space around them so tightly that nothing can escape, even light itself. And yet, despite their famous blackness, some black holes are quite visible. The gas and stars these galactic vacuums devour are sucked into a glowing…