Wilt ChamberlainWilton Norman Chamberlain (August 21, 1936 – October 12, 1999) was a former NBA basketball player. Known as Wilt the Stilt (a nickname he hated) or The Big Dipper, he is regarded as one of the greatest and most dominant basketball players of all time[1] for the incredible statistical achievements he attained throughout his playing career. Born in Philadelphia, Pennsylvania, Chamberlain drew national attention playing at Overbrook High School in the city. He played two years for the University of Kansas, where he earned All-American honors twice and led the Jayhawks to the 1957 championship game (which they lost to North Carolina 54-53 in three overtimes). After that game, he decided to turn pro, citing that he wanted to be paid for being double and triple teamed every night. The Philadelphia Warriors owned his NBA rights, having picked him in 1955 as a territorial pick. However, he wasn't eligible to play in the NBA until his college class graduated in 1959. He played two years with the Harlem Globetrotters until finally becoming eligible to join the Warriors. He was listed as third pick in the NBA draft but was actually a territorial pick. In his first year with the Warriors, Chamberlain lead the league in scoring, with 37.6 points per game, and rebounding, with 27 rebounds per game. He became the first player to be named MVP and Rookie of the Year in the same season. The Warriors lost to the Boston Celtics in the Conference Finals that year, which would be an ongoing occurrence in Chamberlain's career. The presence of the Celtics in the same Eastern Division as the Warriors (his rookie year saw the first of the Celtics' record eight straight NBA titles) kept Chamberlain out of the NBA Finals until 1964. By this time, the Warriors had moved to San Francisco, where, ironically, they lost to the Celtics. After that season, Chamberlain was traded back to Philadelphia, where the Syracuse Nationals had recently moved to become the 76ers. Again, he was blocked from the finals by the presence of the Celtics in the Eastern Division. However, he was the centerpiece of the Sixers team that finally ended the Celtics dynasty in 1967, winning a then-record 68 games en route to the NBA title. Only two years later, he was traded to the Los Angeles Lakers, where he won another title in 1972, and was instrumental in setting a new records for most victories in a season (69), as well as that team's 33-game winning streak, the longest such streak in any American professional sport. Chamberlain, however, was not that impressed. "I played with the Harlem Globetrotters and we won 445 in a row," he said at the time. "And they were all on the road." In 1973, the San Diego Conquistadors of the American Basketball Association offered Chamberlain a $600,000 contract as player-coach. The Lakers sued to keep Chamberlain off the court, and he never played another game, coaching the Conquistadors for only one year. The 7-foot 1-inch (2.16 m) Chamberlain holds nearly 100 NBA records, including the record for most points in a game -- 100, which he scored on March 2, 1962, against the New York Knicks in Hershey, Pennsylvania. He averaged 30.1 points and 22.9 rebounds per game for his career. He led the NBA in rebounding 11 times, led in shooting percentage seven times, led in scoring seven times, and even led in assists one season. In his 14 years in the NBA, he never once fouled out of a game, despite being the centerpiece on defense for each team he played for. His 1961-62 scoring average of 50.4 ppg, accomplished with the Philadelphia Warriors, is by far the NBA record. Chamberlain also holds the next three spots on the NBA's season scoring average list with 44.8, 38.9 and 38.4 points per game. The next closest player is Elgin Baylor, who averaged 38.3 ppg in the same '61-62 season in which Chamberlain set the record. Chamberlain is also the only player in NBA history to achieve a double-triple-double (20 points, 20 rebounds, 20 assists), in one game. Chamberlain scored 31,419 points in 1,045 professional games. This was the best in the league when he retired in 1973, though his scoring total has since been exceeded by Kareem Abdul-Jabbar and Karl Malone, both of whom played several more seasons than Chamberlain, and by Michael Jordan. His career scoring average of 30.06 points per game (ppg) is second-highest in league history, fractionally behind Jordan's 30.12 ppg. Chamberlain ranked #2 in SLAM Magazine's Top 75 NBA Players of all time in 2003. Personal lifeHis battles with center Bill Russell were legendary; they were fierce competitors on the court, yet were close personal friends off the hardwood. Wilt also earned accolades for other sports, including track and field (in which he ran the 100-yard dash in 10.9 seconds in high school), volleyball (he founded and starred in a pro league) and auto racing, among others. He flirted with boxing, and was offered a pro football contract by Kansas City Chiefs in 1966. He also was an actor, celebrity and businessman after his playing career concluded. In 1984, he co-starred (along with future Governor of California Arnold Schwarzenegger) in Conan the Destroyer. He also could bench press 500 pounds. He authored four books before his death on October 12, 1999, including an autobiography, A View from Above, in which he controversially claimed to have had sex with almost 20,000 women — this would have averaged 1.2 women per day from age 15 until his death. Many people doubted his specific number, though few questioned the fact of wild sexual behavior. He drew heavy criticism from many public figures, who accused him of fulfilling stereotypes about African Americans, and of behaving irresponsibly (especially given the AIDS crisis, which was well underway by the 1980s, when many of the conquests were made). Chamberlain defended himself, saying "I was just doing what was natural — chasing good-looking ladies, whoever they were and wherever they were available". He also noted that he never tried to sleep with a woman who was married. Chamberlain always wore a rubber band around his wrist, due to a superstition, and was fond of saying that "Nobody roots for Goliath." He died unexpectedly of a heart attack in his sleep in his Los Angeles, California home. This page about Wilt Chamberlain includes information from a Wikipedia article. 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Chamberlain always wore a rubber band around his wrist, due to a superstition, and was fond of saying that "Nobody roots for Goliath." He died unexpectedly of a heart attack in his sleep in his Los Angeles, California home. Many video games also use this element, such as Red Faction. He also noted that he never tried to sleep with a woman who was married. Dick) and the television series Babylon 5. Chamberlain defended himself, saying "I was just doing what was natural — chasing good-looking ladies, whoever they were and wherever they were available". This is a major plot element in the novels of Greg Bear and Kim Stanley Robinson, as well as the movie Total Recall (based on a short story by Philip K. He drew heavy criticism from many public figures, who accused him of fulfilling stereotypes about African Americans, and of behaving irresponsibly (especially given the AIDS crisis, which was well underway by the 1980s, when many of the conquests were made). Another popular theme, particularly among American writers, is the Martian colony that fights for independence from Earth. Many people doubted his specific number, though few questioned the fact of wild sexual behavior. However, pseudo-scientific speculations about the Face on Mars and other enigmatic landmarks spotted by space probes have meant that ancient civilizations continue to be a popular theme in science fiction, especially in film. He authored four books before his death on October 12, 1999, including an autobiography, A View from Above, in which he controversially claimed to have had sex with almost 20,000 women — this would have averaged 1.2 women per day from age 15 until his death. After the Mariner and Viking spacecraft had returned pictures of Mars as it really is, an apparently lifeless and canal-less world, these ideas about Mars had to be abandoned and a vogue for accurate, realist depictions of human colonies on Mars developed, the best known of which may be Kim Stanley Robinson's Mars trilogy. He also could bench press 500 pounds. In the movie Mars Attacks! the Martians also invade Earth. In 1984, he co-starred (along with future Governor of California Arnold Schwarzenegger) in Conan the Destroyer. Wells' The War of the Worlds, in which Martians seek to escape their dying planet by invading Earth. He also was an actor, celebrity and businessman after his playing career concluded. G. He flirted with boxing, and was offered a pro football contract by Kansas City Chiefs in 1966. Thus originated a large number of science fiction scenarios, the best known of which is H. Wilt also earned accolades for other sports, including track and field (in which he ran the 100-yard dash in 10.9 seconds in high school), volleyball (he founded and starred in a pro league) and auto racing, among others. For many years, a standard notion of the planet as a drying, cooling, dying world with ancient civilizations constructing irrigation works. His battles with center Bill Russell were legendary; they were fierce competitors on the court, yet were close personal friends off the hardwood. Until the arrival of planetary probes, the traditional view of Mars derived from the astronomers Percival Lowell and Giovanni Schiaparelli, whose observation of supposedly linear features on the planet created the myth of canals on Mars. Chamberlain ranked #2 in SLAM Magazine's Top 75 NBA Players of all time in 2003. The depiction of Mars in fiction has been stimulated by its dramatic red color and by early scientific speculations that its surface conditions might be capable of supporting life. His career scoring average of 30.06 points per game (ppg) is second-highest in league history, fractionally behind Jordan's 30.12 ppg. In a statement released after the launch of the mission, the Society said that the flag "has now been honored by a vessel of the leading spacefaring nation on Earth," and added that "(i)t is fitting that this action occurred when it did: at the dawning of a new millenium.". This was the best in the league when he retired in 1973, though his scoring total has since been exceeded by Kareem Abdul-Jabbar and Karl Malone, both of whom played several more seasons than Chamberlain, and by Michael Jordan. While other designs have been proposed, the republican tricolor has been adopted by the Mars Society as its own official banner. Chamberlain scored 31,419 points in 1,045 professional games. This design was suggested by the Kim Stanley Robinson sci-fi trilogy Red Mars, Green Mars, and Blue Mars. Chamberlain is also the only player in NBA history to achieve a double-triple-double (20 points, 20 rebounds, 20 assists), in one game. Designed by NASA engineer and Flashline Mars Arctic Research Station task force leader Pascal Lee and carried aboard by astronaut John Mace Grunsfeld, the flag consists of three vertical bars (red, green, and blue), symbolizing the transformation of Mars from a barren planet (red) to one bearing sustainable life (green), and finally to a fully terraformed planet with open bodies of water. The next closest player is Elgin Baylor, who averaged 38.3 ppg in the same '61-62 season in which Chamberlain set the record. In early 2000, a proposed Mars flag flew aboard the space shuttle Discovery. Chamberlain also holds the next three spots on the NBA's season scoring average list with 44.8, 38.9 and 38.4 points per game. If colonization is going to happen, Mars seems a likely choice due to its rather hospitable conditions (compared with other planets, it is most like Earth). His 1961-62 scoring average of 50.4 ppg, accomplished with the Philadelphia Warriors, is by far the NBA record. Also, present biologic activity is one of the explanations that have been suggested for the presence of traces of methane within the Martian atmosphere, but other explanations not involving life are generally considered more likely. In his 14 years in the NBA, he never once fouled out of a game, despite being the centerpiece on defense for each team he played for. The Viking probes carried experiments designed to detect microorganisms in Martian soil at their respective landing sites, and had some positive results, later denied by many scientists, resulting in ongoing controversy. He led the NBA in rebounding 11 times, led in shooting percentage seven times, led in scoring seven times, and even led in assists one season. Some researchers think that a certain rock which is believed to have originated on Mars - specifically, meteorite ALH84001 - does contain evidence of past biologic activity, but no consensus about these claims has been achieved so far and recent research indicates that the rock, since its creation several billion years ago, has never been exposed to temperatures for extended periods of time that would allow for liquid water. He averaged 30.1 points and 22.9 rebounds per game for his career. Some evidence suggests that the planet once was significantly more habitable than today, but the question on whether living organisms ever actually existed there is an open one. The 7-foot 1-inch (2.16 m) Chamberlain holds nearly 100 NBA records, including the record for most points in a game -- 100, which he scored on March 2, 1962, against the New York Knicks in Hershey, Pennsylvania. The rock may have been ejected from the same crater as the meteorite, or from another crater in the same area of the Martian surface. The Lakers sued to keep Chamberlain off the court, and he never played another game, coaching the Conquistadors for only one year. On April 14, 2004, NASA revealed that a rock known as "Bounce", studied by the Mars Exploration Rover Opportunity, was similar in composition to the meteorite EETA79001-B, discovered in Antarctica in 1979. In 1973, the San Diego Conquistadors of the American Basketball Association offered Chamberlain a $600,000 contract as player-coach. In Solar System Research (March 2004, vol 38, page 97) it was suggested that the unique Kaidun meteorite, recovered from Yemen, may have originated on the Martian moon of Phobos. "And they were all on the road.". On August 6, 1996 NASA announced that analysis of the ALH 84001 meteorite thought to have come from Mars, shows some features that may be fossils of single-celled organisms, although this idea is controversial. "I played with the Harlem Globetrotters and we won 445 in a row," he said at the time. Two of them may show signs of ancient bacterial activity. Chamberlain, however, was not that impressed. A handful of objects are known that are surely meteorites and may be of Martian origin. Only two years later, he was traded to the Los Angeles Lakers, where he won another title in 1972, and was instrumental in setting a new records for most victories in a season (69), as well as that team's 33-game winning streak, the longest such streak in any American professional sport. Möstlin at Heidelberg. However, he was the centerpiece of the Sixers team that finally ended the Celtics dynasty in 1967, winning a then-record 68 games en route to the NBA title. The only occultation of Mars by Venus to be observed was that of October 3, 1590, seen by M. Again, he was blocked from the finals by the presence of the Celtics in the Eastern Division. There are also transits of Mercury and transits of Venus, and the moon Deimos is of sufficiently small angular diameter that its partial "eclipses" of the Sun are best considered transits (see Transit of Deimos from Mars). After that season, Chamberlain was traded back to Philadelphia, where the Syracuse Nationals had recently moved to become the 76ers. At that time the Sun, the Earth and Mars will be exactly in a line. By this time, the Warriors had moved to San Francisco, where, ironically, they lost to the Celtics. A transit of the Earth as seen from Mars will occur on November 10, 2084. The presence of the Celtics in the same Eastern Division as the Warriors (his rookie year saw the first of the Celtics' record eight straight NBA titles) kept Chamberlain out of the NBA Finals until 1964. See also: Aspects of Mars. The Warriors lost to the Boston Celtics in the Conference Finals that year, which would be an ongoing occurrence in Chamberlain's career. For instance, the minimum distance on August 22, 1924 was 0.37284 AU, compared to 0.37271 AU on August 27, 2003, and the minimum distance on August 24, 2208 will be 0.37278 AU. He became the first player to be named MVP and Rookie of the Year in the same season. However, to keep this in perspective, this record approach was only an imperceptibly tiny fraction less than other recent close approaches that occur four times every 284 years. In his first year with the Warriors, Chamberlain lead the league in scoring, with 37.6 points per game, and rebounding, with 27 rebounds per game. Detailed analysis of the solar system's gravitational landscape forecasts an even closer approach in 2287. He was listed as third pick in the NBA draft but was actually a territorial pick. The last time it came so close is estimated to have been on September 12, 57,617 BC. He played two years with the Harlem Globetrotters until finally becoming eligible to join the Warriors. This close approach came about because Mars was one day from opposition and about three days from its perihelion, making Mars particularly easy to see from Earth. However, he wasn't eligible to play in the NBA until his college class graduated in 1959. On August 27, 2003, at 9:51:13 UT, Mars made its closest approach to Earth in nearly 60,000 years: 55,758,006 km (approximately 35 million miles) without Light-time correction. The Philadelphia Warriors owned his NBA rights, having picked him in 1955 as a territorial pick. Especially noticeable, even at low magnification, are the polar ice caps. After that game, he decided to turn pro, citing that he wanted to be paid for being double and triple teamed every night. At its most favourable times — which occur twice every 32 years, alternately at 15 and 17-year intervals, and always between late July and late September — Mars shows a wealth of surface detail to a telescope. He played two years for the University of Kansas, where he earned All-American honors twice and led the Jayhawks to the 1957 championship game (which they lost to North Carolina 54-53 in three overtimes). To a naked-eye observer, Mars usually shows a distinct yellow, orange or reddish colour, and varies in brightness more than any other planet as seen from Earth over the course of its orbit, due to the fact that when furthest away from the Earth it is more than seven times as far from the latter as when it is closest (and can be lost in the Sun's glare for months at a time when least favourably positioned). Born in Philadelphia, Pennsylvania, Chamberlain drew national attention playing at Overbrook High School in the city. However, this varies because the orbits are elliptical. Known as Wilt the Stilt (a nickname he hated) or The Big Dipper, he is regarded as one of the greatest and most dominant basketball players of all time[1] for the incredible statistical achievements he attained throughout his playing career. Earth passes Mars every 780 days (or two years plus seven weeks and one day) at a distance of about 80,000,000 km. Wilton Norman Chamberlain (August 21, 1936 – October 12, 1999) was a former NBA basketball player. Large Martian craters are named after important scientists and science fiction writers; smaller ones are named after towns and villages on Earth. For example 'Nix Olympica' (the snows of Olympus) has become 'Olympus Mons' (Mount Olympus). Large albedo features retain many of the older names, but are often updated to reflect new knowledge of the nature of the features. Today, features on Mars derive from a number of sources. Even so, Proctor's names are not without charm, and for all their shortcomings they were a foundation on which later astronomers would improve. In particular, Dawes appeared no fewer than six times (Dawes Ocean, Dawes Continent, Dawes Sea, Dawes Strait, Dawes Isle, and Dawes Forked Bay). Proctor's nomenclature has often been criticized, mainly because so many of his names honored English astronomers, but also because he used many names more than once. Proctor explained his system of nomenclature by saying, "I have applied to the different features the names of those observers who have studied the physical peculiarities presented by Mars." Here are some of his names, paired with those later proposed by Schiaparelli:. William Rutter Dawes' earlier drawings of 1865, then the best ones available. In 1867, Richard Anthony Proctor drew up a map of Mars based, somewhat crudely, on the Rev. Secchi commented that it "seems to play the role of the Atlantic which, on Earth, separates the Old Continent from the New" —this was the first time the fateful canale, which in Italian can mean either "channel" or "canal", had been applied to Mars. In 1858, it was also dubbed the "Atlantic Canale" by the Jesuit astronomer Angelo Secchi. To give a couple of examples, Solis Lacus was known as the "Oculus" (the Eye), and Syrtis Major was usually known as the "Hourglass Sea" or the "Scorpion". Over the next twenty years or so, as instruments improved and the number of observers also increased, various Martian features acquired a hodge-podge of names. Rather than giving names to the various markings they mapped, Beer and Mädler simply designated them with letters; Meridian Bay (Sinus Meridiani) was thus feature "a". In 1840, Mädler combined ten years of observations and drew the first map of Mars ever made. They started off by establishing once and for all that most of the surface features were permanent, and pinned down Mars' rotation period. Although better remembered for mapping the Moon starting in 1830, Johann Heinrich Mädler and Wilhelm Beer were the first "areographers". The name Mars comes from the Roman god of war because the planet is a blood-red color, and so it looks like a drop of blood in the sky. Dust devils were first imaged on Mars from the surface by Mars Pathfinder. Dust devils have even passed over the Rovers, cleaning the solar panels in the process (see picture below). In addition, dust devils imaged from ground-level have been detected moving across the surface of Mars by Spirit (MER-A). Among the most significant science return has been evidence of liquid water some time in the past at both landing sites. Both missions landed successfully in January 2004 and have met or exceeded all their targets; while a 90-day nominal mission was planned, as of December 2005, their missions have been extended twice and they continue to return science, although some mechanical faults have occurred. Also in 2003, NASA launched the twin Mars Exploration Rovers named Spirit (MER-A) and Opportunity (MER-B). Attempts to contact the Beagle 2 failed and it was declared lost in early February 2004. In 2003, the ESA launched the Mars Express craft consisting of the Mars Express Orbiter and the lander Beagle 2. Mars Odyssey determined that there are significant deposits of water ice in the upper meter or so of Mars' regolith within 30° of the north and south pole. Another possible origin proposed for these gully features is transient melting of surface water snow, frost, or ice. Global Surveyor has taken pictures of gullies and debris flow features that suggest there may be current sources of liquid water, similar to an aquifer, at or near the surface of the planet. Among the most successful missions are the Mars probe program, the Mariner and Viking programs, Mars Global Surveyor, Mars Pathfinder, and Mars Odyssey. Part of this high failure rate can be ascribed to technical problems, but enough have either failed or lost communications for no apparent reason that some researchers half-jokingly speak of an Earth-Mars "Bermuda Triangle" or of a Great Galactic Ghoul which subsists on a diet of Mars probes, or of a Mars Curse. Roughly two-thirds of all spacecraft destined for Mars have failed in one manner or another before completing or even beginning their missions. Dozens of spacecraft, including orbiters, landers, and rovers, have been sent to Mars by the Soviet Union (Russia), the United States, Europe, and Japan to study the planet's surface, climate, and geography. Mars has two tiny natural moons, Phobos and Deimos, which orbit very close to the planet and are thought to be captured asteroids. Deposits of water ice and layers of frost have been found in many different locations on the planet. While scientists do not refer to the patch as a "lake", the water ice patch is remarkable for its size and for being present throughout the year. ESA scientists have attributed most of this height difference to sand dunes beneath the water ice, which are partially visible. According to the original HRSC/Mars Express feature [7], the height difference between the crater floor and the surface of the water ice is about 200 metres. The crater is 35 km (23 mi) wide and about 2 km (1.2 mi) deep. [6] Images of the crater, taken by the High Resolution Stereo Camera on board the European Space Agency's Mars Express spacecraft, clearly show a broad sheet of ice in the bottom of an unnamed crater located on Vastitas Borealis, a broad plain that covers much of Mars' far northern latitudes, at approximately 70.5° North and 103° East. On 29 July 2005, the BBC reported that a visible "ice lake" had been discovered in a crater in the north polar region of Mars. The color changes have been ascribed to dust storms. The linear features are now known to be mostly non-existent or, in some cases, dry ancient watercourses. This gave rise to many stories concerning Martians. They were apparently artificial linear features on the surface that were asserted to be canals, and due to seasonal changes in the brightness of some areas that were thought to be caused by vegetation growth. This was popularly mistranslated as 'canals', and the myth of the Martian canals began. Schiaparelli called these observed features canali, meaning channels in Italian. These beliefs are due mainly to observations by many in the 19th century popularized by Percival Lowell and Giovanni Schiaparelli. Mars has an important place in human imagination due to the belief by some that life existed on Mars. After the spacecraft Mariner 9 provided extensive imagery of Mars in 1972, a small crater (later called Airy-0), located in the Sinus Meridiani ('Middle Bay' or 'Meridian Bay') along the line of Beer and Mädler, was chosen by Merton Davies of the RAND Corporation to provide a more precise definition of 0.0° longitude when he established a planetographic control point network. In 1877, their choice was adopted as the prime meridian by the Italian astronomer Giovanni Schiaparelli when he began work on his notable maps of Mars. The German astronomers Wilhelm Beer and Johann Heinrich Mädler selected a small circular feature as a reference point when they produced the first systematic chart of Mars features in 1830-32. Zero meridian: Mars' equator is defined by its rotation, but the location of its Prime Meridian was specified, as was Earth's, by choice of an arbitrary point which was accepted by later observers. This pressure and temperature correspond to the triple point of water. The datum for Mars is defined by the fourth-degree and fourth-order spherical harmonic gravity field, with the zero altitude defined by the 610.5 Pa (6.105 mbar) atmospheric pressure surface (approximately 0.6% of Earth's) at a temperature of 273.16 K. Zero elevation: Since Mars has no oceans and hence no 'sea level', a zero-elevation surface or mean gravity surface must be selected. Other notes:. The International Astronomical Union's Working Group for Planetary System Nomenclature is responsible for naming Martian surface features. Combined with the planets' different radii, this means Mars is nearly three times "rougher" than Earth. In comparison, the difference between Earth's highest and lowest points (Mount Everest and the Mariana Trench) is only 19.7 km. The difference between Mars' highest and lowest points is nearly 31 km (from the top of Olympus Mons at an altitude of 26 km to the bottom of the Hellas impact basin at an altitude of 4 km below the datum). See list of craters on Mars. The largest of these is the Hellas impact basin, covered with light red sand. Mars is also scarred by a number of impact craters. The Tharsis region of Mars also has the solar system's largest canyon system, Valles Marineris or the Mariner Valley, which is 4000 km long and 7 km deep. See list of mountains on Mars. It is in a vast upland region called Tharsis, which contains several large volcanos. The shield volcano, Olympus Mons (Mount Olympus), is at 26 km the highest mountain in the solar system. The southern polar cap differs from the Northern polar cap in that it appears to contain at least some permanent deposits of CO2, which are changing on the time scale of years. Each cap has surface deposits of carbon dioxide ice that form a polar "hood" during Martian winter, and then sublimate during the summer uncovering the underlying cap surface of layered water ice and dust. Mars has polar ice caps that contain frozen water and carbon dioxide that change with the Martian seasons. The largest dark feature seen from Earth is Syrtis Major. The dark features were thought to be seas, hence their names Mare Erythraeum, Mare Sirenum and Aurorae Sinus. The paler plains covered with dust and sand rich in reddish iron oxides were once thought of as Martian 'continents' and given names like Arabia Terra (land of Arabia) or Amazonis Planitia (Amazonian plain). The surface of Mars as seen from Earth is consequently divided into two kinds of areas, with differing albedo. The dichotomy of Martian topography is striking: northern plains flattened by lava flows contrast with the southern highlands, pitted and cratered by ancient impacts. As of 2006, this interpretation remains controversial with no consensus having emerged yet. In 1996, researchers studying a meteorite (ALH84001) believed to have originated from Mars reported features which they attributed to microfossils left by life on Mars. On the opposite side of the planet the mineral goethite, which (unlike hematite) forms only in the presence of water, along with other evidence of water, has also been found by the Spirit rover in the "Columbia Hills". Later studies suggested that this liquid water was actually acid because of the types of minerals found at the location. Because liquid water is a key prerequisite for life, we infer conditions at Meridiani may have been habitable for some period of time in Martian history". This and other evidence led a group of 50 scientists to conclude in the December 9, 2004 edition of the journal Science that "Liquid water was once intermittently present at the Martian surface at Meridiani, and at times it saturated the subsurface. Other minerals have also been found containing forms of sulfur, iron or bromine such as jarosite. The spheres are only a few millimeters in diameter and are believed to have formed as rock deposits under watery conditions billions of years ago. Amongst the findings from the Opportunity rover is the presence of hematite on Mars in the form of small spheres on the Meridiani Planum. However, this has yet to be proven [5] or widely accepted and remains an area of active research. One interesting theory, published in 1999 and reexamined in October 2005 in a publication by the same group, is that these bands could be evidence of the past operation of plate tectonics on Mars. This magnetization has been compared to alternating bands found on the ocean floors of Earth. Observations of the magnetic fields on Mars by the Mars Global Surveyor spacecraft have revealed that parts of the planet's crust has been magnetized. Much of the surface is deeply covered by dust as fine as talcum powder. There is some evidence that some portion of the Martian surface might be more silica-rich than typical basalt, perhaps similar to andesitic rocks on Earth, though these observations may also be explained by silica glass. The surface of Mars is thought to be primarily composed of basalt, based upon the Martian meteorite collection and orbital observations. However, it is now cooler than it was in the 1970s.[4]. Recently, evidence has been discovered suggesting that Mars may be warming in the short term[3]. These clouds of water-ice were photographed by the Opportunity rover in 2004.[2]. These seasonal actions transport large amounts of dust and water vapor giving rise to Earth-like frost and large cirrus clouds. When the poles are again exposed to sunlight the CO2 ice sublimates, creating enormous winds that sweep off the poles as fast as 250 mph (402.33 km/h). In the winter months when the poles are in continual darkness, the surface gets so cold that as much as 25% of the entire atmosphere condenses out into meters thick slabs of CO2 ice (dry ice). Other aspects of the Martian atmosphere vary significantly. Plans are now being made to look for other companion gases that may suggest which sources are most likely; in the Earth's oceans biological methane production tends to be accompanied by ethane, while volcanic methane is accompanied by sulfur dioxide. The methane appears to occur in patches, which suggests that it is being rapidly broken down before it has time to become uniformly distributed in the atmosphere, and so it is presumably also continually being released to the atmosphere. Volcanic activity, comet impacts, and the existence of life in the form of microorganisms such as methanogens are among possible but as yet unproven sources. The presence of methane on Mars would be very intriguing, since as an unstable gas it indicates that there must be (or have been within the last few hundred years) a source of the gas on the planet. The maximum temperature is roughly 20℃ (68℉). The thin atmosphere cannot hold heat and is the cause of the lower temperatures on Mars. The atmosphere is quite dusty, giving the Martian sky a tawny color when seen from the surface; data from the Mars Exploration Rovers indicates the suspended dust particles are roughly 1.5 micrometres across.[1] In 2003, methane was apparently discovered in the atmosphere by Earth-based telescopes and possibly confirmed in March 2004 by the Mars Express Orbiter; present measurements state an average methane concentration of about 11±4 ppb by volume (see reference). The atmosphere on Mars is 95% carbon dioxide, 3% nitrogen, 1.6% argon, and contains traces of oxygen and water. However, the scale height of the atmosphere is about 11 km, somewhat higher than Earth's 6 km. Mars' atmosphere is thin: the air pressure on the surface is only 750 pascals, about 0.75% of the average on Earth. The solar day (or sol) on Mars is very close to Earth's day: 24 hours, 39 minutes, and 35.244 seconds. Mars has only a quarter the surface area of the Earth and only one-tenth the mass, though its surface area is approximately equal to that of the Earth's dry land because Mars lacks oceans. The red, fiery appearance of Mars is caused by iron oxide (rust) on its surface. It was known by the Egyptians as "Her Deschel" or "the Red One." Among the Babylonians Mars was known as "Nergal" or "the Star of Death." The Romans were the ones to give Mars its modern name, after their god of war. Mars has been obvious to skygazers since prehistoric times. . The Chinese, Japanese, Korean and Vietnamese cultures refer to the planet as 火星, or fire star, a naming based on the ancient Chinese mythological cycle of Five Elements. This symbol is a stylized representation of the shield and spear of the god Mars, and in biology it is used as a sign for the male sex. The astronomical symbol for Mars is ♂, a circle with an arrow pointing northeast. (Areology is also used to refer to the study of Mars as a whole rather than just the geological processes of the planet.). The prefix areo- refers to Mars in the same way geo- refers to Earth—for example, areology versus geology. Mars has two moons, Phobos and Deimos; both are small and oddly-shaped, and are possibly captured asteroids. Mars has also earned the nickname "The Red Planet" due to the reddish appearance it has when seen from Earth at night. It is named after Mars, the Roman god of war (Ares in Greek mythology). Mars is the fourth planet from the Sun in our solar system. Hind Land = Libya. Herschel I Continent = Zephyria, Aeolis, Aethiopis. Cassini Land = Ausonia. Hooke Sea = Mare Tyrrhenum. Secchi Continent = Memnonia. Maraldi Sea = Maria Sirenum and Cimmerium. Madler Continent = Chryse, Ophir, Tharsis. Dawes Sea = Tithonius Lacus. Lockyer Sea = Solis Lacus. De La Rue Ocean = Mare Erythraeum. Dawes Continent = Aeria and Arabia. Herschel II Strait = Sinus Sabaeus. Main Sea = Lacus Moeris. Lockyer Land = Hellas. Kaiser Sea = Syrtis Major. |