Pole Star - Other Planets

Other Planets

Pole stars of other planets are defined analogously: they are stars that most closely coincide with the projection of the planet's axis of rotation onto the Celestial sphere. Different planets have different pole stars because their axes are oriented differently. (See Poles of astronomical bodies.)

  • Alpha Pictoris is the south pole star of Mercury, while Omicron Draconis is the north star.
  • Phi Draconis is the closest star to the southern pole of Venus, however Eta¹ Doradus is brighter though not as close.
  • Delta Doradus is the south pole star of the Moon.
  • Kappa Velorum is only a couple of degrees from the south Celestial pole of Mars. The top two stars in the Northern Cross, Sadr and Deneb, point to the north Celestial pole of Mars.
  • Delta Octantis is the south pole star of Saturn.
  • Eta Ophiuchi is the north pole star of Uranus and 15 Orionis is its south pole star.
  • The north pole of Neptune points to a spot midway between Gamma and Delta Cygni. Its south pole star is Gamma Velorum.

Some asteroids have more than one axis of rotation, possible due to impacts with other bodies. These asteroids tumble in space and have no pole stars. It is possible that a planet could be similarly affected, though unlikely as the much greater mass of a planet and its (usually) spherical shape make it much more unlikely for an impact to create a second axis of rotation.

Read more about this topic:  Pole Star

Other articles related to "other planets, planet, planets":

Places In The Works Of Madeleine L'Engle - Time Quartet - Other Planets
... When Meg, Calvin and Charles Wallace travel to other planets, the ones whose names are given include the following Camazotz – A planet of extreme ... Ixchel – A planet of muted colors, inhabited by tall, motherly, sightless creatures with tentacles ... Uriel – A planet with extremely tall mountains, an allusion to the Archangel Uriel ...
The Sublimed - Dra'Azon
... Specifically, the Dra'Azon maintain a number of so-called "Planets of the Dead" worlds which, because the civilisations that originally inhabited these ... Around such planets a Quiet Barrier is maintained, preventing communication in or out ... of Schar's World in the novel) are allowed on the surface of such planets as stewards, and have routine though infrequent contact with the rest of galactic civilisation ...
List Of Andromeda Star Systems - Other Planets
... Acheron - A planet where a High Guard Missile Defense Battery, was taken over by the Drago-Kazov ... Amarna - A planet where Dylan is fighting the Genites and is saved by Constantine Stark ... Elba IX - A prison planet guarded by a weapon of Bartolome Naz's creation, the Attrox ...
PSR B1257+12 - Planetary System - Planets
... In 1992, Aleksander Wolszczan and Dale Frail discovered that the pulsar has two planets ... These were the first extrasolar planets ever to be confirmed as pulsar planets, they surprised many astronomers who expected to find planets only around main-sequence stars ... the system, because of a claim of an earlier pulsar planet around PSR 1829-10 that had to be retracted due to errors in calculations ...

Famous quotes containing the word planets:

    Why are all these dolls falling out of the sky?
    Was there a father?
    Or have the planets cut holes in their nets
    and let our childhood out,
    or are we the dolls themselves,
    born but never fed?
    Anne Sexton (1928–1974)

    Marriage is the clue to human life, but there is no marriage apart from the wheeling sun and the nodding earth, from the straying of the planets and the magnificence of the fixed stars.
    —D.H. (David Herbert)