angle: Angular distance between the places in the sky
Description
The function computes angle between two or more objects on the sky.
Usage
angle(x, y = NULL)
Arguments
x
an object of class "apos"
y
optional second object of class "apos"
Value
If y==NULL, the function returns value of class (angle,dist),
containing the angles (in degrees) between all positions in
the given object (for example distances between all planets
for one day).If y is given (y should contain the same row number than x) and
the return value is a vector of distances between the subsequent
corresponding rows (for example distance between Moon and Sun
for some days ahead).
options(latitude=51,longitude=22)
data(bright)
angle(bright)
angle(planets())
j=jd(length=100)
plot(angle(mercury(j),venus(j))) # angle between Venus and Mercury for next 100 days