Encyclopedia > Perihelion

  Article Content

Periapsis

Redirected from Perihelion

Given two objects, A and B (two planets for example), if object B orbits around object A; periapsis is the point in the orbit of B which is closest to A.

  • If object A is Earth, it's also known as perigee.
  • If object A is the Sun, it's also known as perihelion.
  • If object A is the Moon, it's also known as perilune.

According to Kepler's laws of planetary motion, as a planet travels in an elliptical orbit, around a star; as the planet approaches the periapsis; it will increase in velocity.

The point of farthest approach is the apoapsis.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Thomas a Kempis

... alike join in giving it praise. The Jesuits give it an official place among their "exercises." John Wesley and John Newton put it among the works that influenced them ...

 
 
 
This page was created in 21.8 ms