This means neutron stars are among the most extreme objects in the known universe. (science.howstuffworks.com)
Neutron stars, stellar corpses that pack the mass of the sun into balls a dozen miles across, are among the most extreme objects in the universe. (discovermagazine.com)
PASADENA, CALIFORNIA — The solar system has gained a new extreme object: L91, a small, icy world with one of the longest known orbits, taking more than 20,000 years to go around the sun. (sciencemag.org)