... The Orion Nebula in Hydrogen . ... Fire on Earth . ... Sometimes, regions of planet Earth can be seen lit up with fire. ... The Leonid Meteor Shower this year could be described as good but not great. During November 17 and 18 the Earth crossed through several streams of sand-sized grit left orbiting the Sun by Comet Tempel-Tuttle. ... This composite image features classic portraits of members of one of the Solar System's most prominent families - Jupiter and its four large "Galilean" moons. ...