deep reflector
51Yerkes Observatory — Infobox Observatory name = Yerkes Observatory caption = Yerkes Observatory, January 2006. organization = University of Chicago|code=754 location = Williams Bay, Wisconsin, USA coords = coord|42|34|13|N|88|33|22|W| altitude = 1050 feet (334 m)… …
52Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
53Scallop — Scientific classification Kingdom: Animalia Phylum …
54New Horizons — For other uses, see New Horizons (disambiguation). New Horizons Operator NASA Major contractors Applied Physics Laboratory (APL) Southwest Research Institute (SwRI) …
55Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …
56History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
57SLOWPOKE reactor — The SLOWPOKE (acronym for Safe Low Power Kritical Experiment) is a low energy, pool type nuclear research reactor designed by Atomic Energy of Canada Limited (AECL) in the late 1960s. It is beryllium reflected with a very low critical mass but… …
58James Dunlop — (31 October 1793 – 22 September 1848) was an astronomer assistant hired by Sir Thomas Brisbane at his private observatory located in Parramatta, New South Wales, about 23 kilometres west of Sydney, Australia during the 1820 s and 30 s. Dunlop was …
59Charlie Zeleny — Birth name Charles Thomas Zeleny Also known as Charlie Z Born September 18, 1981 (1981 09 18) (age 30) Origin New Jersey, USA …
60North American P-51 variants — Main article: North American P 51 Mustang Further information: North American A 36, F 82 Twin Mustang The North American P 51 Mustang was an American long range single seat fighter aircraft that entered service with Allied air forces in the… …
