At 3.3 billion light-years across, the ring may challenge the “cosmological principle” that the universe looks uniform at sufficiently large scales.
A recent study proposes that gravity, the force shaping galaxies and anchoring planets, might not be fundamental after all.
General Motors Co. engages in the designing, manufacturing, and selling of trucks, crossovers, cars, and automobile parts, and in providing software-enabled services and subscriptions. It operates ...