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9 answers

An antenna.

Mount Aricebo in Puerto Rico has one of the largest.

There is also an array of antennae that act as one used by SETI every so often.

2007-06-05 09:18:43 · answer #1 · answered by ? 5 · 0 1

The 2012 is exactly that: a hoax! No respectable or responsible scientists are predicting any such events for 2012. Could youplease explain how a webbot could possibly detect a planet when telescopes can't? NASA hasn't detected any such object (see source below). The world has existed for over four billion years. Is it reasonable to expect that it will come to an end in less than four years? And all because of a Mayan calendar? Use some common sense. The most interesting astronomical events in 2012 will be an annular eclipse of the Sun on 2012 May 20, a total eclipse of the Sun on 2012 Nov 13, and a transit of the planet Venus across the face of the Sun on 2012 Jun 06. Scientists don't expect anything out of the ordinary to happen in the year 2012, or specifically on the date December 21, except for the solstice, which happens every year. None of the "predicted" happenings for 2012 hold up under close scrutiny. "Planet X" and "Nibiru" simply don't exist. The Mayan calendar ends a cycle, but there were no predictions of the end of the world. The Sun doesn't line up with the galactic centre; it's 6 degrees off. No asteroids or comets are actually predicted to hit Earth. All of this stuff was put together by crackpots in order to promote their books and TV shows, and shamelessly promoted by the History Channel. Don't take any of it seriously!

2016-05-17 12:12:05 · answer #2 · answered by Anonymous · 0 0

Any type of radio device can have the chacteristics as a detector. Areocibo Observatory is the largest single dish. This dish is still contrcated out for detection once in a while from Cornell and private investors.

2007-06-09 08:20:21 · answer #3 · answered by Kirk Rose 3 · 0 0

Any type of radio picks up radio waves... The range of frequency may be too high or low, but as long as you have a big enough receiver (those big satellite dishes), a simple radio can be used to detect radio waves from objects in space.

See also:
http://en.wikipedia.org/wiki/SETI

2007-06-05 09:19:57 · answer #4 · answered by David T 3 · 0 1

A radio is the active device used to detect RF (radio frequency). An antenna is a passive device used to gather and direct the RF to the radio.

2007-06-05 09:27:02 · answer #5 · answered by DaveSFV 7 · 0 0

Thats a Radio Telescope. They just point it at some object in space to see if there is anything there.

2007-06-05 09:39:20 · answer #6 · answered by Mr. Smith 5 · 0 0

A radio telescope. Do a search for the VLA (Very Large Array) and the Aricebo Observatory..

2007-06-05 09:20:54 · answer #7 · answered by JLynes 5 · 0 1

A radio telescope.

2007-06-08 10:31:01 · answer #8 · answered by johnandeileen2000 7 · 0 0

You are referring to a Radio Telescope. They are essentially just big antenna's and or satellite dishes.

2007-06-05 09:20:04 · answer #9 · answered by New Dog Owner 4 · 2 1

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