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BASIC EXTRAGALACTIC ASTRONOMY - Part 7: Galaxies - Morphological Diversity

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#1 rekokich

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Posted 07 October 2020 - 12:34 PM

The only primary evidence available to an astronomer about a very remote object consists of photometric measurements, a spectrogram, and an image which is in many cases no more than a pinpoint of light. In this article we present basic cosmological concepts and simplified mathematical methods which allow an amateur to derive from this meager data a surprising number of physical properties of distant extragalactic objects with a precision of several percent within professional results.

Click here to view the article
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#2 rboe

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Posted 09 October 2020 - 05:32 PM

Thank you! :bow:


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#3 Rungrandpa

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Posted 16 October 2020 - 08:41 PM

Enjoyed this article - thanks.



#4 sunnyday

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Posted 18 October 2020 - 09:52 PM

how do we read the first articles?



#5 rekokich

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Posted 19 October 2020 - 12:35 AM

https://www.cloudyni...-velocity-r3213

https://www.cloudyni...parameter-r3214

https://www.cloudyni...n-and-mas-r3221

https://www.cloudyni...ification-r3226

https://www.cloudyni...d-quasars-r3233

https://www.cloudyni...ification-r3248


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#6 sunnyday

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Posted 19 October 2020 - 03:01 PM

thanks .


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#7 Andrew Brown

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Posted 20 October 2020 - 06:20 AM

Wish I could understand it without a dictionary handy.




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