... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Astronomy 101 . ... Colorful life-form catalog will help discern if weт??re alone . ... While looking for life on planets beyond our solar system, a group of international scientists has created a colorful catalog containing reflection signatures of Earth life-forms that might be found on planet surfaces throughout the cosmic hinterlands. ... Only registered members of Astronomy.com are allowed to comment on this article...