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Seven Classical Planets
A classical planet is an astronomical object that is visible to the naked eye and moves across the sky and its backdrop of fixed stars (the common stars which seem still in contrast to the planets), appearing as wandering stars. Visible to humans on Earth there are seven classical planets (the seven luminaries). They are from brightest to dimmest: the Sun, the Moon, Venus, Jupiter, Mercury, Mars and Saturn. Greek astronomers such as Geminus and Ptolemy recorded these classical planets during classical antiquity, introducing the term ''planet'', which means 'wanderer' in Greek ( and ), expressing the fact that these objects move across the celestial sphere relative to the fixed stars. Therefore, the Greeks were the first to document the astrological connections to the planets' visual detail. Through the use of telescopes other celestial objects like the classical planets were found, starting with the Galilean moons in 1610. Today the term ''planet'' is used considerably diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Object
An astronomical object, celestial object, stellar object or heavenly body is a naturally occurring physical entity, association, or structure that exists within the observable universe. In astronomy, the terms ''object'' and ''body'' are often used interchangeably. However, an astronomical body or celestial body is a single, tightly bound, contiguous entity, while an astronomical or celestial ''object'' is a complex, less cohesively bound structure, which may consist of multiple bodies or even other objects with substructures. Examples of astronomical objects include planetary systems, star clusters, nebulae, and galaxies, while asteroids, moons, planets, and stars are astronomical bodies. A comet may be identified as both a body and an object: It is a ''body'' when referring to the frozen nucleus of ice and dust, and an ''object'' when describing the entire comet with its diffuse coma and tail. History Astronomical objects such as stars, planets, nebulae, aster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescope
A telescope is a device used to observe distant objects by their emission, Absorption (electromagnetic radiation), absorption, or Reflection (physics), reflection of electromagnetic radiation. Originally, it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word "telescope" is defined as a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nabu
Nabu (, ) is the Babylonian patron god of literacy, scribes, wisdom, and the rational arts. He is associated with the classical planet Mercury in Babylonian astronomy. Etymology and meaning The Akkadian means 'announcer' or 'authorised person', derived from the Semitic root or . It is cognate with , , and , all meaning 'prophet'. History Nabu was worshiped by the Babylonians and the Assyrians. Nabu gained prominence among the Babylonians in the 1st millennium BC when he was identified as the son of the god Marduk. Nabu was worshipped in Babylon's sister city Borsippa, from where his statue was taken to Babylon each New Year so that he could pay his respects to his father. Nabu's symbols included a stylus resting on a tablet as well as a simple wedge shape; King Nabonidus, whose name references Nabu, had a royal sceptre topped with Nabu's wedge. Clay tablets with especial calligraphic skill were used as offerings at Nabu's temple. His wife was the Akkadian goddess Tash ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ninurta
Ninurta (: , possible meaning "Lord [of] Barley"), also known as Ninĝirsu (: , meaning "Lord [of] Girsu"), is an List of Mesopotamian deities, ancient Mesopotamian god associated with farming, healing, hunting, law, scribes, and war who was first worshipped in early Sumer. In the earliest records, he is a god of agriculture and healing, who cures humans of sicknesses and releases them from the power of Demons#Mesopotamia, demons. In later times, as Mesopotamia grew more militarized, he became a warrior deity, though he retained many of his earlier agricultural attributes. He was regarded as the son of the chief god Enlil and his main Cult (religious practice), cult center in Sumer was the Eshumesha temple in Nippur. Ninĝirsu was honored by Gudea, King Gudea of Lagash (ruled 2144–2124 BC), who rebuilt Ninĝirsu's temple in Lagash. Later, Ninurta became beloved by the Assyrians as a formidable warrior. The Assyrian king Ashurnasirpal II (ruled 883–859 BC) built a massive tem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ishtar
Inanna is the List of Mesopotamian deities, ancient Mesopotamian goddess of war, love, and fertility. She is also associated with political power, divine law, sensuality, and procreation. Originally worshipped in Sumer, she was known by the Akkadian Empire, Akkadians, Babylonian religion, Babylonians, and Assyrians as Ishtar. Her primary title is Queen of Heaven (antiquity), "the Queen of Heaven". She was the patron goddess of the Eanna temple at the city of Uruk, her early main religious center. In archaic Uruk, she was worshipped in three forms: morning Inanna (Inana-UD/hud), evening Inanna (Inanna sig), and princely Inanna (Inanna NUN), the former two reflecting the phases of her associated planet Venus. Her most prominent symbols include the Lion of Babylon, lion and the Star of Ishtar, eight-pointed star. Her husband is the god Dumuzid (later known as Tammuz), and her (attendant) is the goddess Ninshubur, later conflated with the male deities Ilabrat and Papsukkal. Inanna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marduk
Marduk (; cuneiform: Dingir, ᵈAMAR.UTU; Sumerian language, Sumerian: "calf of the sun; solar calf"; ) is a god from ancient Mesopotamia and patron deity of Babylon who eventually rose to prominence in the 1st millennium BC. In Babylon, Marduk was worshipped in the temple Esagila. His symbol is the spade and he is associated with the Mušḫuššu. By the 1st millennium BC, Marduk had become astrologically associated with the planet Jupiter. He was a prominent figure in ancient near eastern cosmology, Babylonian cosmology, especially in the Enūma Eliš creation myth. Name The name of Marduk was solely spelled as dAMAR.UTU in the Old Babylonian Period, although other spellings such as MES and dŠA.ZU were also in use since the Kassite Period. In the 1st millennium BC, the ideograms dŠU and KU were regularly used. The logogram for Adad is also occasionally used to spell Marduk. Texts from the Old Babylonian period support the pronunciation Marutu or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shamash
Shamash (Akkadian language, Akkadian: ''šamaš''), also known as Utu (Sumerian language, Sumerian: dutu "Sun") was the List of Mesopotamian deities, ancient Mesopotamian Solar deity, sun god. He was believed to see everything that happened in the world every day, and was therefore responsible for justice and protection of travelers. As a divine judge, he could be associated with the Ancient Mesopotamian underworld, underworld. Additionally, he could serve as the god of divination, typically alongside the weather god Adad. While he was universally regarded as one of the primary gods, he was particularly venerated in Sippar and Larsa. The Moon God, moon god Nanna (Sumerian deity), Nanna (Sin) and his wife Ningal were regarded as his parents, while his twin sister was Inanna (Ishtar). Occasionally other goddesses, such as Manzat (goddess), Manzat and Pinikir, could be regarded as his sisters too. The dawn goddess Aya (goddess), Aya (Sherida) was his wife, and multiple texts describe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sin (mythology)
Sin () or Suen (, ) also known as Nanna ( ) is the Mesopotamian god representing the moon. While these two names originate in two different languages, respectively Akkadian language, Akkadian and Sumerian language, Sumerian, they were already used interchangeably to refer to one deity in the Early Dynastic Period (Mesopotamia), Early Dynastic period. They were sometimes combined into the double name Nanna-Suen. A third well attested name is Dilimbabbar (). Additionally, the name of the moon god could be represented by logograms reflecting his lunar character, such as d30 (), referring to days in the lunar month or dU4.SAKAR (), derived from a term referring to the crescent. In addition to his astral role, Sin was also closely associated with cattle herding. Furthermore, there is some evidence that he could serve as a judge of the dead in the Ancient Mesopotamian underworld, underworld. A distinct tradition in which he was regarded either as a god of equal status as the usual hea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neptune
Neptune is the eighth and farthest known planet from the Sun. It is the List of Solar System objects by size, fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth. Compared to Uranus, its neighbouring ice giant, Neptune is slightly smaller, but more massive and denser. Being composed primarily of gases and liquids, it has no well-defined solid surface. Neptune orbits the Sun once every 164.8 julian year (astronomy), years at an orbital distance of . It is named after Neptune (mythology), the Roman god of the sea and has the astronomical symbol representing Trident of Poseidon, Neptune's trident. Neptune is not visible to the unaided eye and is the only planet in the Solar System that was not initially observed by direct empirical observation. Rather, unexpected changes in the orbit of Uranus led Alexis Bouvard to hypothesise that its orbit was subject to gravitational Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranus
Uranus is the seventh planet from the Sun. It is a gaseous cyan-coloured ice giant. Most of the planet is made of water, ammonia, and methane in a Supercritical fluid, supercritical phase of matter, which astronomy calls "ice" or Volatile (astrogeology), volatiles. Atmosphere of Uranus, The planet's atmosphere has a complex layered cloud structure and has the lowest minimum temperature () of all the Solar System's planets. It has a marked axial tilt of 82.23° with a Retrograde and prograde motion, retrograde rotation period of 17 hours and 14 minutes. This means that in an 84-Earth-year orbital period around the Sun, its poles get around 42 years of continuous sunlight, followed by 42 years of continuous darkness. Uranus has the third-largest diameter and fourth-largest mass among the Solar System's planets. Based on current models, inside its volatile Mantle (geology), mantle layer is a rocky core, and surrounding it is a thick hydrogen and helium atmosphere. Trace amount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering Water distribution on Earth, 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most of which is located in the form of continental landmasses within Earth's land hemisphere. Most of Earth's land is at least somewhat humid and covered by vegetation, while large Ice sheet, sheets of ice at Polar regions of Earth, Earth's polar polar desert, deserts retain more water than Earth's groundwater, lakes, rivers, and Water vapor#In Earth's atmosphere, atmospheric water combined. Earth's crust consists of slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's outer core, Earth has a liquid outer core that generates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detected in 1988, was confirmed in 2003. In 2016, it was recognized that the first possible evidence of an exoplanet had been noted in 1917. In collaboration with ground-based and other space-based observatories the James Webb Space Telescope (JWST) is expected to give more insight into exoplanet traits, such as their composition, environmental conditions, and potential for life. There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of planets near the star; thus, 85% of the exoplanets detected are inside the tidal locking zone. In several cases, multiple planets have been observed around a star ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
