Question: You have loads of terrestrial interference, so how do you know the signals you receive are extra terrestrial?…
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Radio Caustics and Cusps in the Earth’s Ionosphere
Question: Hi! My question is about ionospheric caustics (IC). In dynamic spectra of several radio telescopes during daily solar…
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…
What Does the VLA See or Hear?
Question: What do the VLAs actually “see” or “hear?” A recent report states Apollo 10 astronauts “heard” strange music…
Can Radio Waves be Focused Like Visible Light?
Question: A visit to your Very Large Array prompted the question, “Can we focus radio waves much as we…
How Did Karl Jansky Measure Galactic Radio Emission at 20.5 MHz When the Earth’s Ionosphere Reflects Radio Waves at This Frequency?
Question: If 20MHz waves are ‘bounced’ by the ionosphere, how is it that Karl Jansky detected 20.5MHz waves coming…