Theia (planet)

Theia /θiːə/ is a hypothesized ancient planetary-mass object in the early Solar System that according to the giant impact hypothesis collided with the Early Earth around 4.533 billion years ago (BYa). According to the hypothesis, Theia was an Earth trojan about the size of Mars, with diameter of about 6,000 km (3,700 miles). New research by UCLA based on rock analysis sourced from Apollo missions 12, 15 and 17, suggests Theia collided head-on with Earth, in contrast to the previous theory which suggested a glancing impact. Models of the impact propose that Theia's debris gathered together around Earth to form the early Moon. After the debris from the collision flew into space, some scientists think that it originally formed two moons which later merged to form the single Moon we know today. However, the two-moon hypothesis is not necessary to explain the difference in the faces of the near and far sides of the Moon. The theory also explains why Earth's core is larger than would be expected for a body its size: according to the hypothesis, Theia's core and mantle mixed with Earth's.

Planet

A planet (from Ancient Greek ἀστήρ πλανήτης astēr planētēs, or πλάνης ἀστήρ plánēs astēr, meaning "wandering star") is an astronomical object orbiting a star or stellar remnant that

The term planet is ancient, with ties to history, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain "planets" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno and Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community, are no longer viewed as such.

Planet Mu

Planet Mu is an English electronic music record label run by Mike Paradinas (also known as µ-Ziq). It was based in Worcester until March 2007, then moved to London and has recently relocated to Broadstairs, Kent. The label started out as a subsidiary of Virgin Records, until in 1998 Mike Paradinas set up the label independent of Virgin and was distributed through SRD.

Artists

Planet (magazine)

Planet is a quarterly cultural and political magazine that looks at Wales from an international perspective, and at the world from the standpoint of Wales.

The magazine publishes high-quality writing, artwork and photography by established and emerging figures, and covers subjects across politics, the arts, literature, current events, social justice questions, minority language and culture, the environment and more.

Planet enjoys a vibrant and diverse international readership and is read by key figures in the Welsh political cultural scene.

The magazine was originally set up as a bi-monthly publication by Ned Thomas in 1970, and was published continually until 1979. This followed a decision in 1967 to devolve the function of The Arts Council of Great Britain in Wales to the Welsh Arts Council. Thomas explained that "The arts council's literature director, Meic Stephens, had a vision of creating a publishing base in Wales that hadn't existed before". The magazine was renamed Planet: the Welsh Internationalist in 1977.

Theia

In Greek mythology, Theia /ˈθiːə/ (sometimes rendered Thea, Théa or Thia), also called Euryphaessa "wide-shining", is a Titaness. The name Theia alone means simply "goddess" or "divine"; Theia Euryphaessa (Θεία Εὐρυφάεσσα) brings overtones of extent (εὐρύς, eurys, "wide", root: εὐρυ-/εὐρε-) and brightness (φάος, phaos, "light", root: φαεσ-). Her brother/consort is Hyperion, a Titan and god of the sun, and together they are the parents of Helios (the Sun), Selene (the Moon), and Eos (the Dawn).

Earlier myths

Hesiod's Theogony gives her an equally primal origin, a daughter of Gaia (Earth) and Uranus (Sky).Robert Graves also relates that later Theia is referred to as the cow-eyed Euryphaessa who gave birth to Helios in myths dating to Classical Antiquity.

Later myths

Once paired in later myths with her Titan brother Hyperion as her husband, "mild-eyed Euryphaessa, the far-shining one" of the Homeric Hymn to Helios, was said to be the mother of Helios (the Sun), Selene (the Moon), and Eos (the Dawn).

Theia (disambiguation)

Theia was a Greek goddess, a Titan who gave birth to the Moon goddess, Selene.

Theia may also refer to:

See also

Theia (horse)

Theia (1973 – after 1989) was a French Thoroughbred racehorse and broodmare. She was widely regarded as the best European filly of her generation in 1975, when she was unbeaten in three races including the Prix du Calvados and the Criterium des Pouliches. In the following year she added wins in the Prix Vanteaux and Prix de la Nonette and finished second in a strongly-contested renewal of the Prix Saint-Alary, but appeared to be just below top class. She was later exported to race in the United States, where she campaigned with limited success. She was later a useful broodmare, producing several winners.

Background

Although officially described a bay during her racing career, Theia was a grey mare with a white blaze and three white socks bred in France by her owner Baronne de Lopez-Taragoya. Her sire, Caro, was a top-class performer (rated 133 by Timeform, whose wins included the Poule d'Essai des Poulains, Prix Ganay and Prix d'Ispahan, before becoming a very successful breeding stallion. Caro's other progeny included Madelia, Crystal Palace, Cozzene and Winning Colors. Theia's dam Cavadonga won as a two-year-old and produced several other winners. Theia was trained during her racing career by Raymond Touflan.