Questions tagged [fundamental-astronomy]

Questions involving reference frames, time scales, and how they are determined.

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Cosmological redshift and comparing past galaxy sizes

If you were to divide the present-day universe into cubes with sides 10 million light-years long, each cube would contain, on average, about one galaxy similar in size to the Milky Way. Now suppose ...
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How to convert horizontal coordinates using NOVAS?

I'm using NOVAS 3.1. I know that I can convert equatorial coordinates to horizontal coordinates using the equ2hor function. Is it possible to make NOVAS do the ...
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Why do we we even exist? [closed]

It came to my mind one day that why does this universe even exist and why do we even exist and like we are enclosed in the so called atmosphere and a floating rock in space called the Earth, so is ...
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Finding Mass of Star with only Luminosity [closed]

Estimate the mass of the star given this formula: $$\frac{L}{L_\mathrm{\odot}} = \left(\frac{M}{M_\mathrm{\odot}}\right)^{3.5}$$ Given $L= 2.752\times10^{28}\,\mathrm{W}$, how do I find the mass of ...