... Tonight's Sky . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... Astronomy for Kids . ... Cosmic mid-life crisis . ... While extreme bursts of star formation, so-called cosmic fireworks, may happen in some galaxy mergers or interactions, they are not the norm in the vast majority of galaxy interactions taking place over the last 7 billion years," Jogee says. ... Only registered members of Astronomy.com are allowed to comment on this article. ...