Phosphorus (morning star) Latin word corresponding to Greek "Phosphorus" is "Lucifer". It is used in its astronomical sense both in prose and poetry. Poets sometimes personify the star, placing it in a mythological context. Phosphorus (morning star) Phosphorus (Greek "Phōsphoros") is the Morning Star, the planet Venus in its morning appearance. Φαοσφόρος ("Phaosphoros") and Φαεσφόρος ("Phaesphoros") are forms of the same name in some Greek dialects. This celestial object was named when stars and planets were not always distinguished with modern precision. Another Greek name for the Morning Star is Heosphoros (Greek "Heōsphoros"), meaning "Dawn-Bringer". The form Eosphorus is sometimes met in English,
Planet potential "rogue planets" are excluded. In the Solar System, all the planets orbit the Sun in the same direction as the Sun rotates (counter-clockwise as seen from above the Sun's north pole). At least one extrasolar planet, WASP-17b, has been found to orbit in the opposite direction to its star's rotation. The period of one revolution of a planet's orbit is known as its sidereal period or "year". A planet's year depends on its distance from its star; the farther a planet is from its star, not only the longer the distance it must travel, but also the slower its