At the end of a lecture on astronomy, describing how the planets orbit the Sun, a little old lady at the back of the room ...

Look up at the night sky and it is easy to believe that stars and galaxies are where the universe keeps almost all of its ...

Dynamical friction. The panels depict sparse areas of the universe with dark colour and dense areas with light colour. The upper panels show the density around a galaxy if the galaxy's gravity bends ...

If a new research paper’s theory is correct, then there should be a much higher population of very small, very luminous galaxies in the early universe. With everything we learn about the nature of ...