In celestial mechanics, perihelion precession, apsidal precession or orbital precession is the precession (rotation) of the orbit of a celestial body. More precisely it is the gradual rotation of the line joining the apsides of an orbit, which are the points of closest and farthest approach. Perihelion is the closest point to the Sun.
Other articles related to "apsidal precession, precession":
... See also Apsidal precession and Laplace–Runge–Lenz vector If the potential energy between the two bodies is not exactly the 1/r potential of ... This apsidal precession is observed for all the planets orbiting the Sun, primarily due to the oblateness of the Sun (it is not perfectly spherical) and the attractions of the other planets for one another ... of the orbit (the periapsis and apoapsis, respectively) apsidal precession corresponds to the rotation of the line joining the apsides ...
... Because of apsidal precession the Earth's argument of periapsis slowly increases ... year while the tropical year (which calendars attempt to track) is shorter due to the precession of Earth's rotational axis, the two forms of 'precession' add ... The figure illustrates the effects of precession on the northern hemisphere seasons, relative to perihelion and aphelion ...
Famous quotes containing the word precession:
“But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.”
—Antonin Artaud (18961948)