radar astronomy
111Astronomical unit — This article is about unit of length. For the full system of units, see Astronomical system of units. 1 astronomical unit = SI units 149.60×10^6 km 149.60×10^9 m Astronomical units 4.8481 …
112electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
113space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
1141991 in spaceflight — |8 January, 00:53:01 GMT |Delta II 7925 |LC 17B, Cape Canaveral |McDonnell Douglas |NATO 4A |NATO |GEO |Comsat |Still in orbit |Successful so far |14 January, 14:50:27 GMT |Soyuz U2 |LC 1, Baikonur |RVSN |Progress M 6 |MOM |LEO, docked to Mir… …
115Redshift — This article is about the astronomical phenomenon. For other uses, see Redshift (disambiguation). Physical cosmology …
116Ronald N. Bracewell — Infobox Scientist name = Ronald N. Bracewell box width = image width = caption = birth date = Birth date|1921|07|22 birth place = Sydney, New South Wales, Australia death date = Death date and age|2007|08|12|1921|07|22 death place = Stanford,… …
117Robert Hanbury Brown — AC (31 August, 1916 ndash; 16 January, 2002) was a British astronomer and physicist born in Aruvankadu, India. He studied electrical engineering at the University of London, from where he received a Master s degree in telecommunication in 1935.… …
118Arthur Covington — Arthur Edwin Covington (21 September 1913 ndash; 17 March 2001) is a Canadian physicist who made the first radio astronomy measurements in Canada. Through these he made the valuable discovery that sunspots generate large amounts of microwaves at… …
119Mars — This article is about the planet. For other uses, see Mars (disambiguation) …
120Arthur C. Clarke — Arthur Clarke redirects here. For other uses, see Arthur Clarke (disambiguation). Sir Arthur C. Clarke, CBE Arthur C. Clarke at his home office in Colombo, Sri Lanka, 28 March 2005 Born 16 December 1917(1917 12 16) …
