... Young super-Jupiter found wandering without a parent . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... Astronomers find "smoking gun" of compact galaxy formation . ... A team at Bristol University has found irrevocable evidence that explains how an unusual type of galaxy, called compact elliptical (cE), is formed and has discovered two examples in which they see the process of formation in action. ... Both of the cEs were found in small groups of galaxies. ...