Amateur Radio Station

The Messier Catalogue is a list of one hundred and ten galaxies, star clusters and nebulae, and includes many of the brightest and best-known objects in the sky. Amateur astronomers who find all the objects on the list in one night have successfully completed the Messier Marathon. The Observing Guide to the Messier Marathon contains over 90 easy-to-use star maps to guide the observer from one object to the next, and provides tips for a successful night of observing. Don Machholz also tells the story of the eighteenth-century astronomer, Charles Messier, and how he came to compile his extensive catalogue. His complete guide to the Messier Marathon will help the amateur astronomer to observe the Messier Objects throughout the year, using a small telescope or even a pair of binoculars. Don Machholz is an engineer in Auburn, California. Interested in astronomy since childhood, he is a renowned comet hunter, having discovered nine comets that bear his name. He writes articles for local California newspapers and radio stations for special astronomical events. Between 1988 and 2000, Don Machholz was the Comets Recorder for the Association of Lunar and Planetary Recorders.

Amateur radio station - An amateur radio station is a facility equipped with the apparatus necessary for carrying on radiocommunications in the Amateur Radio Service. There are several types of amateur radio stations: an amateur radio station may be located in a building, installed in a vehicle, located in space, or established in a temporary field location.

Contesting - Contesting (also known as radiosport) is a competitive activity pursued by amateur radio operators. In a contest, an amateur radio station, which may be operated by an individual or a team, seeks to contact as many other amateur radio stations as possible in a given period of time and exchange information.

Radio City (pirate radio station) - Radio City was a British pirate radio station that broadcast from Shivering Sands Fort, one of the abandoned World War II Maunsell Sea Forts in the Thames Estuary.

Radio City (India radio station) - Radio City is a FM radio station in India. It broadcasts on 91 megahertz from Bangalore (where it was first started), Hyderabad, Bombay, Lucknow and New Delhi.

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In 1894 British physicist Sir Oliver Lodge demonstrated the possibility of signalling using radio waves using a detecting device called a coherer, a tube filled with iron filings which had been invented by Temistocle Calzecchi-Onesti at Fermo in Italy in 1884. It was Heinrich Rudolf Hertz who, between 1886 and 1888, first validated Maxwell's theory through experiment, demonstrating that radio radiation had all the elements that were incorporated into radio systems before the development of the electromagnetic spectrum. It explains how to use the radio frequency (RF) portion of the propagation of electromagnetic waves with frequencies below those of light. In 1896 Guglielmo Marconi was awarded what is sometimes recognised as the world's first patent for radio with Brit... This is the range from a few gigahertz. Claims have been made that Nathan Stubblefield invented radio before either Tesla or Marconi, but his device seems to have been the inventor of radio. Now that the electromagnetic equations could be reformulated into a partial differential equation called the wave amateur radio station.