Galileo Galilei illustration from 1905 book "An Alphabet of History" by Wilbur Dick Nesbit; http://openlibrary.org/b/OL7159266M astronomy astronomer galileo Galileo Galilei
A simplified reflector telescope on tripod. Drawn in Inkscape. telescope science astronomy Reflector telescope
Amateur Astronomer looks at night sky beside his telescope. Silhouette. Original was a photograph at Wikimedia.org http://commons.wikimedia.org/wiki/File:Astronomy_Amateur_3_V2.jpg created by user Halfblue. astronomy telescope amateur Amateur Astronomer