Apsis

Apogee is also the name of a major video game publisher.

In astronomy, an apsis (plural apsides) is the point of greatest or least distance of the elliptical orbit of a celestial body from a center of attraction. The point of closest approach is called the periapsis and the point of farthest approach is the apoapsis. A straight line drawn through the periapsis and apoapsis is the line of apsides, sometimes called the major-axis of the ellipse. It's simply a line drawn through the longest part of the ellipse.

According to Kepler's laws of planetary motion, as a body approaches the periapsis it will increase in velocity and as a body approaches the apoapsis it will decrease in velocity.

When the body the orbit is around is known, more specific names are often used.

Body being orbited	Closest approach	Farthest approach
Earth	perigee	apogee
The Sun	perihelion	aphelion
A star	periastron	apastron or apoastron
The Moon	perilune	apolune
Jupiter	perijove	apojove
A black hole	perimelasma	apomelasma