The Birth of a Gravastar: How a Star Escapes a Black Hole ⚡ экспресс
Original: "Formation of gravastars"
A star's collapse can end not as a black hole, but as a gravastar—a bubble of dark energy.
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A dying star shrinks, but at the last moment, a tiny bubble of dark energy is born inside. It grows and halts the collapse, turning the star into a gravastar—an eternal glowing sphere without a black hole's abyss. New research reveals for the first time how this can happen and provides a recipe for making such objects.
🎯 Inside a gravastar, space expands like a newborn Universe—a miniature cosmos hidden from us by a glowing shell.
\mathcal{C} = 3/8
Threshold value: if the mass-to-radius ratio is less than 3/8, a gravastar forms; otherwise, a black hole.