... Tonight's Sky . ... Observing . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Exocomets may be as common as exoplanets . ... The discovery by astronomers at the University of California, Berkeley, and Clarion University in Pennsylvania of six likely comets around distant stars suggests that comets т?? dubbed "exocomets" т?? are just as common in other stellar systems with planets. ... Only registered members of Astronomy.com are allowed to comment on this article. ...