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d_e
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Some spherical formulae:

https://people.sc.fsu.edu/~dduke/thurston-formula.pdf

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17
On Mars, why are the seasons "strongly amplified" in the southern hemisphere and masked in the northern hemisphere?
Mar 27, 2022
14
How it is not possible to say if Titius–Bode law is a "coincidence" or not?
May 31, 2022
11
What are those stars that cross the galactic center?
Jun 7, 2022
11
How exactly was Giovanni Cassini able to measure the distance to Mars?
Oct 6, 2021
10
Why aren't there eclipses every month when the moon's orbit is aligned with the ecliptic as a result of lunar precession?
Nov 14, 2021
7
Where is it possible to observe the Moon for 24 hours?
Nov 21, 2021
7
Why didn't Johannes Kepler use data about more planets?
Mar 24, 2022
7
How was the First Point of Aries measured in ancient times?
Jul 9, 2022
6
what is the resolution of the magnitude that is distinguishable to the naked eye?
Nov 30, 2019
6
What is the average angular distance between the Sun and the Moon?
Apr 7, 2022
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27
Can't Import com.google.android.gms.location.LocationServices
21
Languages which changed their writing direction
17
Could one consider using Latin as a daily casual language these days?
16
Gen. 1:20 is reptile ablative?
14
In Vulgate Lk 22: 62, "Et egressus foras Petrus flevit amare.", it says. How to understand "flevit amare"?