Questions about the part of the electromagnetic spectrum with wave lengths longer than those of infrared radiation.
Questions tagged [radio]
43 questions
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HI mass from HI column density
I have a galaxy for which I have HI column density values. I want to estimate the corresponding HI mass. To do the same, I want to estimate the flux density of this source. How can I achieve the same?
The equation to estimate the HI mass from HI…
SlightDecoy
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Detecting people on Proxima Cen b
Recently the news announced the discovery of a planet with characteristics similar in size to earth with the possibility for liquid water, 4.2 light years away.
Now, if there was a civilisation of human beings, pretty much identical to our own…
Tom J Nowell
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