How can we best find protoclusters, the progenitors of today’s galaxy clusters, in the early universe?
Given what we know about our universe, what is the most massive possible observable galaxy at a given time?
Last year’s discovery of CR7, an intriguing galaxy in the early universe, encouraged many exotic explanations. New observations somewhat spoil the party
Simulations of the first groups of stars display a variety of shapes and sizes, and may provide clues as to where their ancestors are hiding today
Have we caught a glimpse of some of the earliest black holes in the universe, and what does it mean for our understanding of the early universe?