Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

  Who's Online

There are currently, 9 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here




Select Interface Language:


  Random Headlines

CCD Video Camera
[ CCD Video Camera ]

·Astronomy: CCD Video Camera - Moon On TV-PUTTING THE MOON ON TV
·Astronomy: CCD Video Camera - JACK NEWTON
·Astronomy: CCD Video Camera - DIGITAL IMAGING
·Astronomy: CCD Video Camera - CCD-CHOOSING A CCD
·Astronomy: CCD Video Camera - VIDEO AND CCD CAMERAS

  Window of Universe: Astronomy: Window of Universe - RADIO SIGNALS
Posted on Saturday, December 11 @ 01:49:06 CST by astronomy
  Window of Universe


Longer-wavelength radio radiation reveals the processes occurring in gaseous nebulas, pulsars (spinning neutron stars), supernova remnants, and the active cores of distant galaxies. A radio telescope consists of an antenna, or antenna-array, connected to a receiver.

The antenna may be as simple as a dipoletype antenna, which looks something like a TV antenna. More often, though, it is a parabolic reflector dish, or an array of dishes. The radio waves are focused and collected by a secondary antenna, known as a feed. They are then transferred to a receiver for amplification and analysis. As with an optical telescope, the sensitivity of the radio telescope increases with the surface area of the antenna.

When two or more radio telescopes are linked so that their signals are fed to a common receiver, they are jointly termed an interferometer. The greater the distance between the radio telescopes, called the baseline, the finer the detail that can be resolved. The Very Large Array, near Socorro in New Mexico, has baselines up to 22 miles (36 km) long, while the Very Long Baseline Array consists of 10 dishes spread over about 5,000 miles (8,000 km)—from Hawaii across the USA to the Virgin Islands in the Caribbean Sea.




Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

  Related Links

· More about Window of Universe
· News by astronomy

Most read story about Window of Universe:
Astronomy: Window of Universe - RADIO SIGNALS


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics

Window of Universe

"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.

No Comments Allowed for Anonymous, please register

  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt