periapsis

As nouns the difference between azimuth and periapsis

is that azimuth is an arc of the horizon intercepted between the meridian of the place and a vertical circle passing through the center of any object; as, the azimuth of a star; the azimuth or bearing of a line surveying while periapsis is (astronomy) the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum.

As nouns the difference between periapsis and periapses

is that periapsis is the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum while periapses is plural of lang=en.

As nouns the difference between taxonomy and periapsis

is that taxonomy is the science or the technique used to make a classification while periapsis is (astronomy) the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum.

In astronomy terms the difference between periapsis and periapse

is that periapsis is the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum while periapse is a periapsis.