Luciano Rezzolla

New simulations show that a dying star can turn into a glowing bubble—a gravastar. At its core, a microscopic seed of dark energy emerges, expanding and halting the collapse exactly at the boundary where a black hole would normally form. Researchers pinpointed the key condition: a sufficiently 'fluf

After neutron stars merge, a ringing clump of ultra-dense matter remains. Analyzing how fast this gravitational chiming fades relative to the spin-down rate allows, for the first time, measurement of matter’s elasticity in the interior, where densities are 5–6 times nuclear. Paradoxically, it can be