... Z Machine Sets Unexpected Earth Temperature Record . ... Long before humankind evolved, before dinosaurs roamed, and even before our Earth existed, ancient globs of stars condensed and orbited a young Milky Way Galaxy. Colors of Comet Pojmanski . ... Comet Pojmanski flew by planet Earth last weekend on a surprise trip through the inner solar system. ... Unexpected Comet Pojmanski Now Visible . ... Comets bright enough to be visible to the unaided eye appear only every few years. ...