Cosmology is no less than the story of everything. Since Galileo first pointed his telescope to the heavens 400 years ago astronomers have made tremendous progress in answering these profound questions. Learn more about Everyday Cosmology
Washington, DC— Brown dwarfs are sometimes called failed stars. They’re stars’ dim, low-mass siblings and they fade in brightness over time. They’re fascinating to astronomers for a variety of reasons, but much about them remains unknown.