Category Archives: Radio Astronomy

How Do You Isolate the Position of a Radio Source?

Question: How do radio astronomers isolate radio emissions from space that are at frequencies of the commercial radio channels?  – Mathav Answer:  In fact, we try not to make measurements at frequencies that correspond to those used be commercial services.  … Continue reading

Tagged Leave a comment

Is There a Period When the Radio Transmission Environment in the NRQZ is “Quieter”?

Question: I know the NRAO is located in a “radio quiet zone.”  Is there a time during the 24 hour day that is “quietest” for you there?  A time you would choose to listen for your weakest signals?   If there … Continue reading

Tagged , Leave a comment

How To Make Images With a Radio Telescope

Question: I just started radio telescope observation, and wanted to know how to use a computer to capture actual images or similar with a radio telescope. I am just using an old TV dish with a satellite receiver and LNB, … Continue reading

Posted in Radio Astronomy, Telescopes | Tagged , | Leave a comment

Where Can One Acquire Large Amateur Radio Antennas?

Question: I am an amateur radio astronomer, and am wondering how to proceed from just a small TV dish to a larger dish. Where can I purchase/acquire second hand a larger (6 or more feet in diameter) dish for more … Continue reading

Posted in Radio Astronomy, Telescopes | Tagged , | Leave a comment

Does the Moon Bend Radio Waves?

Question: Regarding radio astronomy, are there any “edge effects” to the moon, meaning can or does the moon bend or diffract radio waves emanating from behind it?  Is it possible it bends it enough to create a focal point on … Continue reading

Tagged Leave a comment

What Radio Astronomy Can Be Done at S-Band?

Question: At work, we have a 14 foot dish with an S-Band receiver.  Are there any interesting radio astronomy frequencies around S-Band?  – Frank Answer: The radio astronomy S-band runs from about 2655 to 3352.5 MHz.  Its use in radio … Continue reading

Posted in Galaxies, Radio Astronomy | Tagged , , | Leave a comment

When Did the Cas A Supernova Occur?

Question: There is a statement at the following link to the image archive that I do not understand: http://images.nrao.edu/Galactic_Sources/Supernova_Remnants/569.  The text states that this supernova is 10,000 light years away, but that the supernova event happened 300 years ago. If … Continue reading

Posted in Radio Astronomy, Stars | Tagged , , | Leave a comment

What Can Radio Telescopes Measure?

Question: I have some questions about radio astronomy. If we build a planetary radio telescope, What data can we measure from the received signals other than listening to the noise of S-burst and  L-burst in a project like Radio JOVE?  … Continue reading

Posted in Radio Astronomy, Solar System, Telescopes | Tagged , , , , | Leave a comment

Very Large Array Visitor Statistics

Question: I am currently working on a research project about dark skies for one of my master classes. I would really appreciate some of your time in getting information about the VLA. Does the VLA keep track of the number … Continue reading

Posted in Radio Astronomy, Telescopes | Tagged , | Leave a comment

Do Radio Sources “Twinkle”?

Question: Usually observations with radio telescopes are not affected by rain, clouds etc. but recently i heard scintillation effects can affect observations with radio telescopes. I want to know why it is affected by that. – Anjali Answer: Radio observations … Continue reading

Posted in Physics, Radio Astronomy | Tagged , | Leave a comment