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How Do You Measure the Mass of a Black Hole with Radio Waves?

Question: How can you measure the mass of a black hole with radio waves? What is the mass of…

Why Do You Need So Many Radio Telescopes?

Question: Why do you need so many radio telescopes? Do they all receive exactly the same frequency? How are…

How Does a Single Dish Telescope Make Images?

Question: How does a single-dish telescope, such as Green Bank, produce images–at least images of more than one pixel?…

How Do You Distinguish Between People-Made Signals and Those From Space?

Question: You have loads of terrestrial interference, so how do you know the signals you receive are extra terrestrial?…

Current and Future Radio Observatories in Antarctica?

Question: I would like to know or find out if you have any information on Antarctic radio telescope/observatories programs…

How to Turn an Old Satellite Dish into a Radio Telescope

Question: I am a high school teacher and three of my students are trying to build a radio telescope…

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The National Radio Astronomy Observatory is a facility of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.
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