Compute the current angular distance between the Sun and the Moon, as observed from your location:

Compute their angular separation as observed from the antipodes of your location:

Plot the angular separation between Jupiter and Saturn between years 2000 and 2040:

Plot the angular separation between the Earth and the Sun as observed from Pluto:

Compute the angular separation between two local named directions:

Find the current angle between the direction to the true equinox and the local north direction:

Plot its evolution over a few days:

AstroAngularSeparation is listable in its first two arguments:

Visualize nutation effects, in arcseconds:

Eddington's observations of gravitational light deflection were performed approximately on this date and location:

Visualize what happened during the eclipse, centering around the position of the Sun:

This gives the observed position of the star HIP20842, also known as HR1403, in Taurus, the constellation the Sun was in on that date:

Compute the angular separation in arcseconds between the positions corrected and not corrected for gravitational deflection:

This is approximately what Eddington measured:

This is the value for the deflection of a star that grazes the edge of the solar disk:

Angles between any two cardinal directions are fixed:

The angular separation between the CIO (celestial intermediate origin) and the true equinox is called the equation of origins: