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Theia ( / ˈθiːə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon. [ 1][ 2] Collision simulations support the idea that the large low-shear-velocity ...
Venus is one of the four terrestrial planets in the Solar System, meaning that it is a rocky body like Earth. It is similar to Earth in size and mass and is often described as Earth's "sister" or "twin". [ 33] Venus is close to spherical due to its slow rotation. [ 34]
Venus ( / ˈviːnəs /) [ a] is a Roman goddess, whose functions encompass love, beauty, desire, sex, fertility, prosperity, and victory. In Roman mythology, she was the ancestor of the Roman people through her son, Aeneas, who survived the fall of Troy and fled to Italy. Julius Caesar claimed her as his ancestor.
Global radar map of the surface of Venus. The surface of Venus is dominated by geologic features that include volcanoes, large impact craters, and aeolian erosion and sedimentation landforms. Venus has a topography reflecting its single, strong crustal plate, with a unimodal elevation distribution (over 90% of the surface lies within an ...
Planetary nomenclature. Planetary nomenclature, like terrestrial nomenclature, is a system of uniquely identifying features on the surface of a planet or natural satellite so that the features can be easily located, described, and discussed. Since the invention of the telescope, astronomers have given names to the surface features they have ...
Terra (mythology) Terra reclining with the Seasons, accompanied by Aion - Uranus within a zodiac wheel ( mosaic from Sentinum, AD 200–250, Glyptothek ). In ancient Roman religion and mythology, Tellus Mater or Terra Mater[ a] ("Mother Earth") is the personification of the Earth. Although Tellus and Terra are hardly distinguishable during the ...
The giant-impact hypothesis, sometimes called the Theia Impact, is an astrogeology hypothesis for the formation of the Moon first proposed in 1946 by Canadian geologist Reginald Daly. The hypothesis suggests that the Early Earth collided with a Mars -sized protoplanet of the same orbit approximately 4.5 billion years ago in the early Hadean eon ...
Enceladus. Surface temp. Enceladus is the sixth-largest moon of Saturn and the 19th-largest in the Solar System. It is about 500 kilometers (310 miles) in diameter, [ 5] about a tenth of that of Saturn 's largest moon, Titan. It is mostly covered by fresh, clean ice, making it one of the most reflective bodies of the Solar System.