 Nançay Radio Telescope primary mirror. Note the small person standing at the base. The Nançay Decimetric Radio Telescope (official abbreviation NRT) is located in the small town of Nançay, two hours' drive south of Paris, France. The radio telescope saw first light in 1965, after an inauguration by the then French president, Charles de Gaulle. The Eiffel Tower has become a symbol of Paris throughout the world. ...
The Parkes 64 metre radio telescope in New South Wales, Australia (the bigger of the two shown) In contrast to an ordinary telescope, which produces visible light images, a radio telescope sees radio waves emitted by radio sources, typically by means of a large parabolic (dish) antenna, or arrays of...
The first light is the moment when a telescope is first used to take an astronomical image after its construction. ...
1965 was a common year starting on Friday (the link is to a full 1965 calendar). ...
Charles André Joseph Marie de Gaulle (November 22, 1890 – November 9, 1970), in France commonly referred to as général de Gaulle, was a French military leader and statesman. ...
The NRT is a transit instrument of the unusual Kraus-type design where the flat primary reflects radio light towards the spherical secondary, which focuses it towards a mobile focal carriage. The primary tilts North-South to select any object near the meridian, while the focal carriage moves East-West along railroad ties to track objects for roughly an hour within transit. The Kraus-type design, named after Dr. John D. Kraus (1910-2004), is also used at the Ohio State University Big Ear Telescope. The word transit, when used alone, has several possible meanings in English a modern rock band in Dallas, TX - [[]http://www. ...
A primary mirror is a form of distributed data management on the Internet. ...
For other uses, see sphere (disambiguation). ...
A secondary mirror (or secondary) is a second light gathering and focusing surface in a reflector telescope. ...
Meridian is: Meridian (astronomy): an imaginary circle perpendicular to the horizon. ...
This is the top-level page of WikiProject trains Rail tracks Rail transport refers to the land transport of passengers and goods along railways or railroads. ...
1910 was a common year starting on Saturday (see link for calendar). ...
2004 is a leap year starting on Thursday of the Gregorian calendar. ...
The Ohio State University (legal name), also known as Ohio State or OSU (not to be confused with Ohio University), is currently the largest state University in the United States. ...
The Big Ear was a radio telescope located on the grounds of the Ohio Wesleyan Universitys Perkins Observatory from the 1960s to 1998 when it was disassembled. ...
 Nançay Radio Telescope focal carriage with the secondary in the background.
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