Simulating Galaxy Formation in Mesmerizing Detail for Clues to the Universe

Using the European Southern Observatory's Very Large Telescope, astronomers discovered a small black hole outside the Milky Way by looking at how it influences the motion of a star in its close vicinity. This is the first time this method has been used to reveal a black hole outside of our galaxy.

Understanding the Early Universe Depends on Estimating the Lifespan of Neutrons

Laws of Logic Lead to New Restrictions on the Big Bang. Physicists are translating commonsense principles into strict mathematical constraints on how our universe must have behaved at the beginning of time.