Jan Chylik

> This could obviously be done by integrating over the curve but that would be beyond the scope of a spreadsheet. There must be a simpler way to approximate the...

Reiterating on that, I can fairly easy add a sheet for that, however you have to decide on the sampling: - selected frequency bands (such as corresponding to ultraviolet, blue,...

> how much of the star's energy output is in a specific frequency band That is definitely possible, but there are few more free parameters of a star that determine...

Perhaps a good question which greenhouse gasses do you consider. Although water vapour and carbon dioxide are the main greenhouse gasses in current Earth's atmosphere, there are also other greenhouse...

And some relevant sources on values Nitrous oxide and Ozone: https://www.researchgate.net/publication/257864234_Emissivity_of_the_main_greenhouse_gases CFCs: https://doi.org/10.1016/0022-4073(77)90116-9

> a simple-ish mathematical relationship between atmospheric density/pressure and overall intensity of the greenhouse effect That is an interesting idea, but I have to disappoint you, such direct dependence is...

And by Equatorial coordinates you mean with respect to equator of Earth, or also equator of some other planets?

> Such a calculator should be doable in SFCalcsheet It is definitely doable, but the tricky thing is checking in the excel sheet whether the input angle is in degrees...

> The main matter is that I don't know how to solve for l in the left side of the equation (l - l0). If you mean the equation 10...

> The versions of the galactic longitude formula are in cells G47-G49 and H49-J49. Please, on which sheet is it? I am having a difficulty to find it.