Minggu, 23 Juni 2013

Universitas Terbaik Jakarta

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Cerdas dan berbudi luhur merupakan dua hal yang terpadu yang tidak terpisahkan, karena kecerdasan tanpa dilandasi budi yang luhur akan cenderung digunakan untuk membodohi dan mencelakakan orang lain, sebaliknya budi luhur tanpa diimbangi kecerdasan akan merupakan sasaran kejahatan dan penindasan dari orang lain.

Untuk mendidik tenaga trampil yang cerdas dan berbudi Luhur itu, maka pada tanggal 1 April 1979 didirikan Akademi Ilmu Komputer (AIK) Budi Luhur di Jakarta, beralamat di Jl. Budi Utomo No. 11 Jakarta Pusat. Akademi ini bertujuan menghasilkan tenaga-tenaga trampil atau professional di bidang komputer guna memenuhi kebutuhan pembangunan nasional.

Setelah dua tahun diperjuangkan, pada tanggal 11 Agustus 1981 AIK Budi Luhur mendapatkan izin operasional dari pemerintah. Dalam surat izin operasional itu, pemerintah mengubah nama AIK Budi Luhur menjadi Akademi Pengetahuan Komputer (APK) Budi Luhur. Nama ini digunakan, ketika pada tanggal 5 Januari 1983 berdasarkan keputusan Mendikbud No. 018/O/1983 APK Budi Luhur mendapat status terdaftar. Dengan status terdaftar yang dimiliki, APK Budi Luhur berhasil menyelenggarakan ujian sarjana muda komputer dengan dosen penguji dari ITB. Dalam ujian negara itu APK Budi Luhur meluluskan sarjana-sarjana muda komputer pertama di Indonesia.

Berkenaan dengan siapnya pembangunan kampus tahap pertama (dengan dua unit gedung berlantai dua), maka pada tanggal 17 Agustus 1985 APK Budi Luhur pindah dari Jl. Budi Utomo No. 11 ke jalan Cileduk Raya, Pertukangan Utara, Kebayoran Lama.

Dengan makin mantapnya penyelenggaraan pendidikan di APK Budi Luhur, dan makin besarnya minat dan kebutuhan keahlian di bidang komputer, maka Yayasan Pendidikan Budi Luhur pada bulan Agustus 1985 mendirikan Akademi Teknik Elektro Komputer (ATEK) Budi Luhur dan Akademi Akuntansi Komputer (AAK) Budi Luhur. Tujuan berdirinya ATEK Budi Luhur adalah menyiapkan tenaga-tenaga yang mampu memegang jabatan dan tugas-tugas yang memerlukan pengetahuan teknik elektro komputer, sedangkan AAK Budi Luhur bertujuan menyiapkan tenaga-tenaga yang mampu memegang jabatan dan tugas-tugas yang memerlukan pengetahuan akuntansi dan komputer.

Dengan kemajuan-kemajuan yang dicapai oleh APK Budi Luhur, Pemerintah memberikan kenaikan status (akreditasi) dari terdaftar menjadi diakui berdasarkan Keputusan Mendikbud No. 0355/I/1986 tanggal 13 Mei 1986. Pemberian status diakui itu mengakibatkan bergantinya nama APK Budi Luhur menjadi Akademik Manajemen Informatika dan Komputer (AMIK) Budi Luhur.

Sejalan dengan meningkatnya kebutuhan dan perhatian masyarakat terhadap ilmu komputer (computer science), serta makin meningkatnya permintaan sarjana muda komputer untuk melanjutkan ke jenjang Strata-1 (S1) didirikan Sekolah Tinggi Pengetahuan Komputer (STPK) Budi Luhur di semester genap  tahun akademik 1985-1986.

Dengan makin mantapnya STPK Budi Luhur dan dengan didorong oleh semua pihak, di tahun 1986 Yayasan Pendidikan Budi Luhur mendirikan Sekolah Tinggi Elektro Komputer  (STEK) Budi Luhur dan Sekolah Tinggi Akuntasi Komputer (STAK) Budi Luhur untuk menyelenggarakan program strata satu (S1) di bidangnya masing-masing.

Di awal tahun 1987, Yayasan Pendidikan Budi Luhur merasa perlu untuk menyederhanakan kelembagaan perguruan tinggi dilingkungannya (STPK, STEK, dan STAK Budi Luhur) ke dalam suatu wadah. Maka berdasarkan Keputusan Mendikbud nomor 0720/I/1987, STPK, STEK, dan STAK Budi Luhur diintegrasikan ke dalam Sekolah Tinggi Manajemen Informatika dan Komputer (STMIK) Budi Luhur dengan jurusan dan program studi sebagai berikut :
  1. Jurusan Manajemen Informatika, dengan program studi :
    a. Manajemen Informatika (D-III Diakui dan S-1 Terdaftar)
    b. Komputerisasi Akuntansi (D-III dan S1 Terdaftar). 
  2. Jurusan Teknik Informatika dengan program studi Teknik Informatika (S-1 Terdaftar).
  3. Jurusan Teknik Komputer, dengan program studi  Teknik Komputer (D III dan S-1 Terdaftar).
Didorong oleh keinginan untuk meningkatkan pelayanan kepada mahasiswa Komputerisasi Akuntansi yang makin bertambah, berdasarkan Keputusan Ketua Yayasan Pendidikan Budi Luhur Nomor 343/KBYL/XI/1989 tanggal 30 November 1989, program studi komputerisasi akuntansi pada jurusan Manajemen Informatika ditingkatkan menjadi jurusan  Komputerisasi Akuntansi.

Dalam upaya diversifikasi usaha, dan sehubungan dengan selesainya pembangunan gedung Unit III dan IV, pada tanggal 1 April 1997 Yayasan Pendidikan Budi Luhur mendirikan Sekolah Tinggi Ilmu Ekonomi (STIE) Budi Luhur. Dan setahun kemudian setelah selesai membangun gedung Unit V, pada tanggal 1 April 1998 didirikan Sekolah Tinggi Teknik (STT) Budi Luhur. Dan kemudian pada tanggal 1 April 1999 Sekolah Tinggi Teknik (STT) Budi Luhur didirikan setelah gedung Unit VI selesai dibangun, Dalam rangka efisiensi, empat sekolah tinggi (STMIK, STIE, STISIP, STT) sesuai dengan Keputusan Menteri Pendidikan Nasional 144/D/0/2002 tanggal 7 Juni 2002 diintegrasikan menjadi Universitas Budi Luhur.

Globalisasi dan krisis yang berkepanjangan memberikan dampak dalam persaingan tenaga kerja profesional yang semakin ketat. Untuk itu kita perlu membekali diri dengan kemampuan akademis maupun praktis agar menjadi tenaga kerja yang tangguh yang terus dapat bertahan dalam persaingan, khususnya dalam meningkatkan karier.

Untuk itu Universitas Budi Luhur membuka kesempatan untuk dapat menambah pengetahuan dalam bidang Teknologi Informasi, Ekonomi, Sosial Politik, Komunikasi dan Teknik yang pada saat ini masih merupakan pilihan teratas dalam peningkatan karier.

Persaingan bebas dan ketat di dunia pendidikan, perkembangan Teknologi Informasi dan Komunikasi (ICT) dan peningkatan pengetahuan konsumen mendorong kami melakukan peningkatan kualitas  dan kepuasan layanan terbukti dengan didapatkannya sertifikasi sistem penjaminan mutu internasional ISO 9001:2000.
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Kampus Terbaik

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Berdirinya Universitas Budi Luhur diawali dengan pendirian Yayasan Pendidikan Budi Luhur pada 1 April 1979. Kiprah Yayasan Pendidikan Budi Luhur dalam pendidikan tinggi dimulai dengan didirikannya Akademi Ilmu Komputer (AIK) pada tahun 1979, yang merupakan perguruan tinggi komputer swasta pertama di Indonesia. Sejarah pendidikan tinggi Indonesia mencatat langkah demi langkah perkembangan Akademi Ilmu Komputer sejak tahun 1979 yang layak disebut sebagai pelopor dalam pendidikan tinggi dibidang komputer di Indonesia.
Universitas Budi Luhur (UBL) adalah sebuah universitas swasta yang merupakan penggabungan dari Sekolah Tinggi Manajemen Informatika dan Komputer (STMIK), Sekolah Tinggi Ilmu Ekonomi (STIE), Sekolah Tinggi Teknik (STT) dan Sekolah Tinggi Ilmu Sosial dan Ilmu Politik (STISIP), diresmikan pendiriannya pada tanggal 7 Juni 2002, berdasarkan surat keputusan Menteri Pendidikan Nasional Republik Indonesia Nomor 114/D/O/2002. Universitas Budi Luhur yang merupakan suatu perwujudan karya nyata Yayasan Pendidikan Budi Luhur bagi bangsa dan negara Republik Indonesia, dirancang untuk ikut mencerdaskan anak bangsa dengan dilandasi budi pekerti yang luhur.
Universitas Budi Luhur adalah kampus terbaik dan sebuah perguruan tinggi swasta yang mengemban misi dari Yayasan Pendidikan Budi Luhur, dengan berlandaskan pada motto Asah-Asih-Asuh. Universitas Budi Luhur menyelenggarakan pendidikan, mengembangkan dan menyebarluaskan serta mengabdikan ilmu pengetahuan, teknologi, kesenian dan ilmu kemanusiaan serta ilmu sosial untuk mengupayakan agar bangsa Indonesia menjadi bangsa yang cerdas dan berbudi luhur.
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Sabtu, 16 Maret 2013

Satelit Saturn

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The moons of Saturn are numerous and diverse, ranging from tiny moonlets less than 1 kilometer across, to the enormous Titan, which is larger than the planet MercurySaturn has 62 moons with confirmed orbits, 53 of which have names, and only 13 of which have diameters larger than 50 kilometers. Saturn has seven moons that are large enough to be ellipsoidal due to having planetary mass, as well as dense rings with complex orbital motions of their own. Particularly notable among Saturn's moons are Titan, the second-largestmoon in the Solar System, with a nitrogen-rich Earth-like atmosphere and a landscape including hydrocarbon lakes and dry river networks;and Enceladus, which emits jets of gas and dust and may harbor liquid water under its south pole region.
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Satelite Neptune

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Neptune has thirteen known moons, by far the largest of which is Triton, discovered by William Lassell on October 10, 1846, just 17 days after the discovery of Neptune itself. Over a century passed before the discovery of the second natural satellite, called Nereid. Neptune's moons are named for minor water deities in Greek mythology.
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Satelite Mars

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Mars has two known moonsPhobos and Deimos,which are thought to be captured asteroids. Both satellites were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology, accompanied their father Ares, god of war, into battle. Ares was known as Mars to theRomans. It is possible that Mars may have moons smaller than 50 - 100 meters and a dust ring between Phobos and Deimos may be present but none have been discovered.
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Satelite Jupiter

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Yupiter untuk saat ini diketahui memiliki 66 satelit. Dengan empat satelit yang terbesar yakni IoEuropaGanymede, dan Callisto. Empat satelit ini dikenal juga dengan satelit Galilea karena ditemukan oleh astronom Galileo Galilei di tahun 1610. Beberapa bulan lainnya baru bisa ditemukan dalam rentang tahun 1892 sampai dengan tahun 2011.
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Moon

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The Moon is the only natural satellite of the Earth, and the fifth largest satellite in the Solar System. It is the largest natural satellite of a planet in the Solar System relative to the size of its primary,having 27% the diameter and 60% the density of Earth, resulting in 181 itsmass. The Moon is the second densest satellite after Io, a satellite of Jupiter.
The Moon is in synchronous rotation with Earth, always showing the same face with its near side marked by dark volcanic maria that fill between the bright ancient crustal highlands and the prominent impact craters. It is the brightest object in the sky after the Sun, although its surface is actually very dark, with a reflectance similar to that of coal. Its prominence in the sky and its regular cycle of phases have, since ancient times, made the Moon an important cultural influence on language, calendars, art and mythology. The Moon's gravitational influence produces the ocean tides and the minute lengthening of the day. The Moon's current orbital distance, about thirty times the diameter of the Earth, causes it to appear almost the same size in the sky as the Sun, allowing it to cover the Sun nearly precisely in total solar eclipses. This matching of apparent visual size is a coincidence. The Moon's linear distance from the Earth is currently increasing at a rate of 3.82±0.07cm per year, however this rate is not constant.
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Jumat, 15 Maret 2013

Black Hole

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black hole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Quantum field theory in curved spacetime predicts that event horizons emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.
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Comet

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comet is an icy small Solar System body (SSSB) that, when close enough to the Sun, displays a visible coma (a thin, fuzzy, temporary atmosphere) and sometimes also a tail. These phenomena are both due to the effects of solar radiation and the solar wind upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. Comets have been observed since ancient times.
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Star

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star is a massive, luminous sphere of plasma held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on the planet. Some other stars are visible from Earth during the night when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensivecatalogues of stars have been assembled by astronomers, which provide standardized star designations.

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Pluto

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Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System (after Eris) and the tenth-most-massive body observed directly orbiting the Sun. Originally classified as the ninth planet from the Sun, Pluto was recategorized as a dwarf planet and plutoid owing to the discovery that it is only one of several large bodies within the Kuiper belt.
Like other members of the Kuiper belt, Pluto is composed primarily of rock and ice and is relatively small, approximately one-sixth the mass of the Earth's Moon and one-third its volume. It has an eccentric and highly inclined orbit that takes it from 30 to 49 AU (4.4–7.4 billion km) from the Sun. This causes Pluto to periodically come closer to the Sun than Neptune. As of 2011, it is 32.1 AU from the Sun.
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Neptune

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Neptune is the eighth and farthest planet from the Sun in the Solar System. It is the fourth-largest planet by diameter and the third-largest by mass. Neptune is 17 times the mass of Earth and is somewhat more massive than its near-twin Uranus, which is 15 times the mass of Earth but not as dense. On average, Neptune orbits the Sun at a distance of 30.1 AU, approximately 30 times the Earth–Sun distance. Named for the Roman god of the sea, its astronomical symbol is ♆, a stylised version of the god Neptune's trident.
Neptune was the first planet found by mathematical prediction rather than by empirical observation. Unexpected changes in the orbit of Uranus led Alexis Bouvard to deduce that its orbit was subject to gravitational perturbation by an unknown planet. Neptune was subsequently observed on 23 September 1846 by Johann Galle within a degree of the position predicted by Urbain Le Verrier, and its largest moon, Triton, was discovered shortly thereafter, though none of the planet's remaining 12 moons were located telescopically until the 20th century. Neptune has been visited by only one spacecraft, Voyager 2, which flew by the planet on 25 August 1989.
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Uranus

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Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both are of different chemical composition than the larger gas giants Jupiter and Saturn. For this reason, astronomers sometimes place them in a separate category called "ice giants". Uranus's atmosphere, while similar to Jupiter's and Saturn's in its primary composition of hydrogen and helium, contains more "ices" such as water, ammonia, and methane, along with traces of hydrocarbons. It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224 °C). It has a complex, layered cloud structure, with water thought to make up the lowest clouds, and methane thought to make up the uppermost layer of clouds. In contrast, the interior of Uranus is mainly composed of ices and rock.
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Saturn

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Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Named after the Roman god Saturn, its astronomical symbol () represents the god's sickle. Saturn is a gas giant with an average radius about nine times that of Earth. While only one-eighth the average density of Earth, with its larger volume Saturn is just over 95 times more massive than Earth.
Saturn's interior is probably composed of a core of iron, nickel and rock (silicon and oxygen compounds), surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium and an outer gaseous layer.The planet exhibits a pale yellow hue due to ammonia crystals in its upper atmosphere. Electrical current within the metallic hydrogen layer is thought to give rise to Saturn's planetary magnetic field, which is slightly weaker than Earth's and around one-twentieth the strength of Jupiter's. The outer atmosphere is generally bland and lacking in contrast, although long-lived features can appear. Wind speeds on Saturn can reach 1,800 km/h (1,100 mph), faster than on Jupiter, but not as fast as those on Neptune.
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Jupiter

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Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in the Solar System combined. Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune. Together, these four planets are sometimes referred to as the Jovian or outer planets. The planet was known by astronomers of ancient times, and was associated with the mythology and religious beliefs of many cultures. The Romans named the planet after the Roman god Jupiter. When viewed from Earth, Jupiter can reach an apparent magnitude of −2.94, making it on average the third-brightest object in the night sky after the Moon and Venus. (Mars can briefly match Jupiter's brightness at certain points in its orbit.) Jupiter is primarily composed of hydrogen with a quarter of its mass being helium, although helium only comprises about a tenth of the number of molecules. It may also have a rocky core of heavier elements, but like the other gas giants, Jupiter lacks a well-defined solid surface. Because of its rapid rotation, the planet's shape is that of an oblate spheroid (it possesses a slight but noticeable bulge around the equator). The outer atmosphere is visibly segregated into several bands at different latitudes, resulting in turbulence and storms along their interacting boundaries. A prominent result is the Great Red Spot, a giant storm that is known to have existed since at least the 17th century when it was first seen by telescope. Surrounding Jupiter is a faint planetary ring system and a powerful magnetosphere. There are also at least 67 moons, including the four large moons called the Galilean moons that were first discovered by Galileo Galilei in 1610. Ganymede, the largest of these moons, has a diameter greater than that of the planet Mercury.
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Mars

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Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth. The rotational period and seasonal cycles of Mars are likewise similar to those of Earth, as is the tilt that produces the seasons. Mars is the site of Olympus Mons, the second highest known mountain within the Solar System (the tallest on a planet), and of Valles Marineris, one of the largest canyons. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two known moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Martian trojan asteroid.
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Earth

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Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the world, the Blue Planet, or by its Latin name, Terra.
Earth formed approximately 4.54 billion years ago, and life appeared on its surface within one billion years. Earth's biosphere then significantly altered the atmospheric and other basic physical conditions, which enabled the proliferation of organisms as well as the formation of the ozone layer, which together with Earth's magnetic field blocked harmful solar radiation, and permitted formerly ocean-confined life to move safely to land. The physical properties of the Earth, as well as its geological history and orbit, have allowed life to persist. Estimates on how much longer the planet will be able to continue to support life range from 500 million years (myr), to as long as 2.3 billion years (byr).
Earth's lithosphere is divided into several rigid segments, or tectonic plates, that migrate across the surface over periods of many millions of years. About 71% of the surface is covered by salt water oceans, with the remainder consisting of continents and islands which together have many lakes and other sources of water that contribute to the hydrosphere. Earth's poles are mostly covered with ice that is the solid ice of the Antarctic ice sheet and the sea ice that is the polar ice packs. The planet's interior remains active, with a solid iron inner core, a liquid outer core that generates the magnetic field, and a thick layer of relatively solid mantle.
Earth gravitationally interacts with other objects in space, especially the Sun and the Moon. During one orbit around the sun, the Earth rotates about its own axis 366.26 times, creating 365.26 solar days, or one sidereal year.The Earth's axis of rotation is tilted 23.4° away from the perpendicular of its orbital plane, producing seasonal variations on the planet's surface with a period of one tropical year (365.24 solar days). The Moon is Earth's only natural satellite. It began orbiting the Earth about 4.53 billion years ago (bya). The Moon's gravitational interaction with Earth stimulates ocean tides, stabilizes the axial tilt, and gradually slows the planet's rotation.
The planet is home to millions of species, including humans. Both the mineral resources of the planet and the products of the biosphere contribute resources that are used to support a global human population. These inhabitants are grouped into about 200 independent sovereign states, which interact through diplomacy, travel, trade, and military action. Human cultures have developed many views of the planet, including its personification as a planetary deity, its shape as flat, its position as the center of the universe, and in the modern Gaia Principle, as a single, self-regulating organism in its own right.
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Kamis, 14 Maret 2013

Venus

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Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from the Sun: its elongation reaches a maximum of 47.8°. Venus reaches its maximum brightness shortly before sunrise or shortly after sunset, for which reason it has been referred to by ancient cultures as the Morning Star or Evening Star.
Venus is classified as a terrestrial planet and is sometimes called Earth's "sister planet" owing to their similar size, gravity, and bulk composition (Venus is both the closest planet to Earth and the planet closest in size to Earth). However, it has been shown to be very different from Earth in other respects. Venus is shrouded by an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light. It has the densest atmosphere of the four terrestrial planets, consisting mostly of carbon dioxide. The atmospheric pressure at the planet's surface is 92 times that of Earth's. With a mean surface temperature of 735 K (462 °C; 863 °F), Venus is by far the hottest planet in the Solar System. It has no carbon cycle to lock carbon back into rocks and surface features, nor does it seem to have any organic life to absorb it in biomass. Venus may have possessed oceans in the past,but these would have vaporized as the temperature rose due to the runaway greenhouse effect. The water has most probably photodissociated, and, because of the lack of a planetary magnetic field, the free hydrogen has been swept into interplanetary space by the solar wind. Venus's surface is a dry desertscape interspersed with slab-like rocks and periodically refreshed by volcanism.
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Mercury

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Mercury is the innermost planet in the Solar System. It is also the smallest, and its orbit is the most eccentric (that is, the least perfectly circular) of the eight planets. It orbits the Sun once in about 88 Earth days, completing three rotations about its axis for every two orbits. The planet is named after the Roman god Mercury, the messenger to the gods.
Mercury's surface is heavily cratered and similar in appearance to Earth's Moon, indicating that it has been geologically inactive for billions of years. Due to its near lack of an atmosphere to retain heat, Mercury's surface experiences the steepest temperature gradient of all the planets, ranging from a very cold 100 K at night to a very hot 700 K during the day. Mercury's axis has the smallest tilt of any of the Solar System's planets, but Mercury's orbital eccentricity is the largest. The seasons on the planet's surface are caused by the variation of its distance from the Sun rather than by the axial tilt, which is the main cause of seasons on Earth and other planets. At perihelion, the intensity of sunlight on Mercury's surface is more than twice the intensity at aphelion. Because the seasons of the planet are produced by the orbital eccentricity instead of the axial tilt, the season does not differ between its two hemispheres.
Because Mercury's orbit lies within Earth's orbit (as does Venus's), it can appear in Earth's sky either as a morning star or an evening star. While Mercury can appear as a very bright object when viewed from Earth, its proximity to the Sun makes it more difficult to see than Venus.
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Solar System

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The Solar System consists of the Sun and its planetary system of eight planets, their moons, and other non-stellar objects. It formed 4.6 billion years ago from the gravitational collapse of a giant molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of rock and metal. The four outer planets, called the gas giants, are substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are composed largely of substances with relatively high melting points (compared with hydrogen and helium), called ices, such as water, ammonia and methane, and are often referred to separately as "ice giants". All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic plane.
The Solar System also contains a number of regions populated by smaller objects.The asteroid belt, which lies between Mars and Jupiter, is similar to the terrestrial planets as it mostly contains objects composed of rock and metal. Beyond Neptune's orbit lie the Kuiper belt and scattered disc; linked populations of trans-Neptunian objects composed mostly of ices. Within these populations, several dozen to more than ten thousand objects may be large enough to have been rounded by their own gravity. Such objects are referred to as dwarf planets. Identified dwarf planets include the asteroid Ceres and the trans-Neptunian objects Pluto, Eris, Haumea, and Makemake. In addition to these two regions, various other small-body populations including comets, centaurs and interplanetary dust freely travel between regions. Six of the planets, at least three of the dwarf planets, and many of the smaller bodies are orbited by natural satellites, usually termed "moons" after Earth's Moon. Each of the outer planets is encircled by planetary rings of dust and other small objects.
The solar wind, a flow of plasma from the Sun, creates a bubble in the interstellar medium known as the heliosphere, which extends out to the edge of the scattered disc. The Oort cloud, which is believed to be the source for long-period comets, may also exist at a distance roughly a thousand times further than the heliosphere. The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of interstellar wind. The Solar System is located within one of the outer arms of Milky Way galaxy, which contains about 200 billion stars.
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