What happens when the universe runs out of stars? ⭐️ Astrophysicist Erika Hamden walks us through the far future of the cosmos, where expansion pushes galaxies apart and star formation comes to a halt. The stars that do exist will eventually burn out, leaving behind black holes. Over trillions of years, those too will disappear through a process called Hawking radiation. In the end, the universe will be filled with a thin, fading soup of particles that slowly vanish. This final state is known as