a point in the heavens (on the celestial sphere)

the (usually elliptical) path described by one celestial body in its revolution about another

the branch of physics that studies celestial bodies and the universe as a whole

(astronomy) the point in an orbit farthest from the body being orbited

periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth

periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun

periapsis in orbit around Jupiter

periapsis in orbit around the moon

the (usually elliptical) path described by one celestial body in its revolution about another

the branch of physics that studies celestial bodies and the universe as a whole