Either of the points in the elliptical orbit of a planet or comet where it is closest or furthest from the sun; perihelion or aphelion; an apside
A recess or projection, with a dome or vault, at the east end of a church; an apse.
The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.
The highest point or state; the peak, zenith.