| painter |
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noun
- an artist who paints pictures
- a laborer or workman who paints surfaces using a paintbrush or other means
- (nautical) A rope connected to the bow of a boat, used to attach it to, e.g. a jetty or another boat.
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| Pallas |
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proper noun
- (Greek mythology) Several people in Greek mythology:
- An epithet for Athena; later Pallas Athena.
- One of the Titans.
- The father of Pallas Athena.
- A goatish giant.
- (astronomy) The second largest asteroid.
- (given name, female, , ) of mythological origin.
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| parallax |
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noun
- The change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer
- The apparent shift of an object against a background due to a change in observer position
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| parsec |
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noun - parallax second, Parallax second.
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| Pavo |
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proper noun
- (constellation) A constellation of the southern sky, said to resemble a peacock. It lies between the constellations Telescopium and Octans.
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| peculiar |
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adjective
- Out of the ordinary; odd; curious; unusual.
- It's rather to see a Kangaroo outside of a zoo in America.
- common, Common or usual for a certain place or circumstance; specific or particular.
- Kangaroos are to Australia.
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| Pegasus |
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proper noun
- (greekmyth) A winged horse fabled to have sprung from the body of Medusa when she was slain. He is noted for causing, with a blow of his hoof, Hippocrene, the inspiring fountain of the Muses, to spring from Mount Helicon. Bellerophon rode Pegasus when he defeated the Chimaera.
- (constellation) An autumn constellation of the northern sky, near the vernal equinoctial point, said to resemble the mythical horse. Its three brightest stars, with the brightest star of Andromeda, form the square of Pegasus. It contains the stars Markab and Algenib.
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| periastron |
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noun
- That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.
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| perigee |
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noun
- (astronomy) That point in the orbit of any object which is at the smallest distance from the center of the central body. For example, the point in the moon's orbit which is the smallest distance from the center of the earth.
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| perihelion |
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noun (pl=perihelia)
- (astronomy) The point in the elliptical orbit of a planet or comet etc where it is nearest to the sun
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| Perseus |
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proper noun
- (greekmyth) The mythological Greek warrior who slew the Gorgon Medusa by decapitate, decapitating her. He married Andromeda after rescuing her from Ceto and founded Mycenae. He was the son of Jupiter and Danae.
- (constellation) An autumn constellation of the northern sky, said to resemble the mythical hero. It includes the stars Algenib and Algol.
- The last Antigonid king of Macedonia, Perseus of Macedon.
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| perturb |
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verb (Wikipedia)
- To disturb; to bother or unsettle.
- (physics) To slightly modify the motion of an object.
- (astronomy) To modify the motion of a body by exerting a gravitational force.
- (math) To modify slightly, such as an equation or value.
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| perturbation |
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noun
- (uncountable) agitation, Agitation; the state of being perturbed
- (countable) A small change in a physical system, or more broadly any definable system (such as a biological or economic system)
- (physics), (astronomy) (countable) Variation in an orbit due to the influence of external bodies
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| Phobos |
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proper noun
- The innermost natural satellite of Mars.
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| Phoebe |
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proper noun - (given name, female, from Greek, ): A female given name
- (greekmyth): A Titan, the daughter of Uranus and Gaia. She became associated with Artemis, goddess of the moon.
- (astronomy): The 14th moon of Saturn
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| Phosphor |
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proper noun
- alternative name of Phosphorus, the morning star
- Anna likened you to , the morning star, and herself to Hesper, the mortal star of evening, and when I told her those twin stars were one and the same, and not a star at all but the planet Venus... - John Barth
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| photoheliograph |
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noun
- A heliograph, with a camera attached, used to photograph the Sun
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| photosphere |
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noun - (astronomy) the visible surface layer of a star, and especially that of the sun
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| Pictor |
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proper noun
- (constellation) A summer constellation of the southern sky, said to resemble an easel. It lies between the constellations Carina and Dorado.
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| Pisces |
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proper noun
- (constellation): A constellation of the zodiac supposedly shaped like a pair of fish.
- (astrology): The Zodiac sign for the fish, covering February 20–March 20.
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| Piscis Austrinus |
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proper noun
- (constellation) An autumn constellation of the northern sky, said to resemble a fish. It contains the star Fomalhaut.
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| planetarium |
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noun (pl=planetariums, pl2=planetaria)
- A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.
- An orrery.
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| planetary |
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adjective
- (astronomy) of, or relating to planets, or the orbital motion of planets
- of, or relating to the earth; terrestrial
- of, or relating to the whole earth; global
- (context, of a gear train) epicyclic
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| planetoid |
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noun - Any of several small rocky bodies in orbit about the sun; the larger asteroids.
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| planetology |
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noun (wikipedia, Planetology)
- the study of planets, planetary systems and the solar system
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| Planet X |
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noun - A large hypothetical planet with an orbit beyond that of Neptune.
- An undiscovered planet in the solar system.
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| Pleiades |
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proper noun
- (greekmyth): The "seven sisters", companions of Artemis and daughters of the Titan Atlas and the sea-nymph Pleione.
- (astronomy): An open cluster of hot blue stars in the constellation Taurus, and the most easily visible such cluster from Earth.
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| Pluto |
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proper noun
- (context, Greek mythology, Roman mythology) Greek and Roman god of the underworld.
- Originally known as the ninth planet but reclassified in 2006 as a dwarf planet, the brightest and first known Kuiper belt object, represented by the symbol (unicode, �) in astronomy and in astrology.
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| pointer |
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noun
- Anything that points or is used for pointing.
- A needle-like component of a timepiece or measuring device that indicates the time or the current reading of the device.
- A breed of hunting dog.
- (complang) A variable which holds the address of a memory location where, presumeably, a value is stored.
- (computing) An icon that indicates the position of the mouse; a cursor.
- A tip, a bit of advice (usually plural.)
- The instructor gave me some pointers on writing a good paper.
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| Polaris |
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proper noun
- (star) The pole star, a trinary star in the constellation Ursa Minor that currently lies close to the north celestial pole; Alpha (α) Ursae Minoris
- A type of U.S. ballistic missile, capable of carrying a nuclear warhead and designed to be launched from a submarine.
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| polestar |
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noun
- (uncountable)(star) Polaris, the pole star
- (countable) A guiding principle
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| Pollux |
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proper noun - (greekmyth): One of the Dioscuri, son of Tyndarus and Leda, brother of Castor.
- (star): A star in the constellation Gemini; beta (β) Geminorum.
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| precession of the equinoxes |
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noun
- The slow westward shift of the equinoxes along the plane of the ecliptic, resulting from precession of the earth's axis of rotation, and causing the equinoxes to occur earlier each year
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| Procyon |
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proper noun
- (star) A star in the constellation Canis Minor; Alpha (α) Canis Minoris. The eighth brightest star in the night sky.
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| prominence |
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noun
- The state of being prominent: widely known or eminent
- relative importance
- A bulge: something that bulges out or is protuberant or projects from a form
- (topography) Autonomous height; relative height or prime factor; a concept used in the categorization of hills and mountains
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| Proxima Centauri |
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proper noun
- (star) A red dwarf star, part of the Alpha Centauri system. It is the nearest star to Earth's solar system.
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| pulsar |
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noun
- (star): A rotating neutron star that emits radio pulses periodically
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| Puppis |
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proper noun
- (constellation) A winter constellation of the northern sky, said to resemble the stern of a ship. Until 1763, it was part of a larger constellation, Argo Navis.
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| Pyxis |
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proper noun
- (constellation) A spring constellation of the northern sky, said to resemble the compass of a ship. It is associated with the larger Argo Navis, although it was never offically part of that constellation.
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