what is mercury's biggest volcanoe? whats its name?
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As far as I am aware, there are none in the terrestrial sense, after the huge meteor impact that formed the Caloris Basin there were massive extrusions of flood lavas that formed the Smooth Plains...but these were 'seeps'.  The core of Mercury is thought to have only a small amount of magma which gives the planet it's magnetic field...but it is doubted that without the outside intervention of the major meteor strike that there would have been any lava flow at all.\n\nIt is also thought that seismic vibrations from the Caloris impact are what caused the hilly and furrowed terrain on the opposite side of the planet.\n\nIt is remarkably similar to our own moon in many respects, airless, crater impacted and causing tides on the sun, just as the moon causes tides in our oceans.
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Mercury is the innermost planet in our solar system, orbiting the Sun once every 88 days. It ranges in brightness from about −2.0 to 5.5 in apparent magnitude, but is not easily seen as its greatest angular separation from the Sun (greatest elongation) is only 28.3°, meaning it is only seen in twilight. The planet remains comparatively little known: the only spacecraft to approach Mercury was Mariner 10 from 1974 to 1975, which mapped only 40%–45% of the planet's surface.\n\nPhysically, Mercury is similar in appearance to the Moon as it is heavily cratered. It has no natural satellites and no atmosphere. The planet has a large iron core which generates a magnetic field about 1% as strong as that of the Earth. Surface temperatures on Mercury range from about 90 to 700 K, with the subsolar point being the hottest and the bottoms of craters near the poles being the coldest.\n\nThe Romans named the planet after the fleet-footed messenger god Mercury, probably for its fast apparent motion in the twilight sky. The astronomical symbol for Mercury (Unicode: ☿) is a stylized version of the god's head and winged hat atop his caduceus, an ancient astrological symbol. Before the 5th century BC, Greek astronomers believed the planet to be two separate objects: one visible only at sunrise, the other only at sunset.\n\nGo to:\nhttp://en.wikipedia.org/wiki/Mercury_%28planet%29
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This is from the following site...\n\nhttp://www.nineplanets.org/mercury.html\n\n"Mercury is in many ways similar to the Moon: its surface is heavily cratered and very old; it has no plate tectonics. On the other hand, Mercury is much denser than the Moon (5.43 gm/cm3 vs 3.34). Mercury is the second densest major body in the solar system, after Earth. Actually Earth's density is due in part to gravitational compression; if not for this, Mercury would be denser than Earth. This indicates that Mercury's dense iron core is relatively larger than Earth's, probably comprising the majority of the planet. Mercury therefore has only a relatively thin silicate mantle and crust. \nMercury's interior is dominated by a large iron core whose radius is 1800 to 1900 km. The silicate outer shell (analogous to Earth's mantle and crust) is only 500 to 600 km thick. At least some of the core is probably molten. \n\nMercury actually has a very thin atmosphere consisting of atoms blasted off its surface by the solar wind. Because Mercury is so hot, these atoms quickly escape into space. Thus in contrast to the Earth and Venus whose atmospheres are stable, Mercury's atmosphere is constantly being replenished."
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this is kind of a trick question as it depends on who you ask and what you mean by largest\n\ngenerally hydra is considered the largest, as it is the longest and streches the length of 172 full moons placed side by side.\n\nbut it is in the southern hemisphere so many people in the northern hemisphere (mostly americans) don't know about it and say that orion is the largest.\n\nand orion is the largest constelllation in the northern hemisphere.\n\nnow if by largest you mean distance and not just area of the sky well then that is different again.\n\nbut just go with hyda, that is what I do.
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Thus far, Mariner 10 has been the only probe to visit Mercury.  It flew past Mercury three time, twice in 1974 and once in 1975.  It's orbit was around the sun so the encounters with Mercury were fly-bys with the probe never entering orbit around the planet.  Six days after the last fly-by, NASA ceased radio contact with the probe and it is believed to still be in orbit around the sun.\n\nThe Mercury Surface, Space Environment, Geochemistry and Ranging (MESSENGER) probe was launched by NASA on August 3, 2004 and will be the second probe to visit and first to enter orbit around Mercury.  It will have two fly-bys, in 2008 and 2009, before entering orbit in 2011 for a mission of at least one year.\n\nThe European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA) have a joint mission to Mercury called BepiColombo planned for launch in August 2013.  This mission will include two orbiters, the ESA Mercury Planetary Orbiter (MPO) and the JAXA Mercury Magnetospheric Orbiter (MMO) with a planned arrival date of 2019.  The BepiColombo mission originally had a lander included but it was canceled due to budgetary constraints.  There is a possibility that the Russian Federal Space Agency (RKA) could contribute a lander to replace the canceled one.
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Venus, Mars, Mercury, Pluto and that new one are big rocks just like Earth, whereas Jupiter, Saturn, Uranus and Neptune are balls of gas.\n\nMars and Venus are the most comparable in mass (with Venus very close and often called our sister planet).  Mars has polar ice caps.
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its a planet that called mercury.
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4-Jupiter\nJupiter is the largest planet in the solar system and is a gas giant made up mostly of hydrogen.\n\nComparing Earth and Jupiter\n\nJupiter's diameter is over ten times greater than the Earth's \n\nIt has over 300 times the mass \n\nIf you weigh 180 pounds on Earth, you would weigh 426 pounds at Jupiter's cloud tops \n\nJupiter is five times further from the Sun than the Earth \n\nJupiter is so large that its famous Great Red Spot (actually a giant, hurricane-like storm that's at least 400 years old) would easily swallow the Earth. Jupiter spins so fast on its axis that it bulges noticeably at its equator (a day on Jupiter is about ten hours long).
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10? Good lord. People who ask for a huge number of obscure facts are so greedy. \n\nYou know you do have search engines on the internet? Ever hear of them?\n\nI will give you a couple.\n\nThe Olympus Mons volcano on Mars is the tallest in the solar system (as tall as everest) and is as big as the entire Hawaiin island chain.\n\nThere are signs of water erosion on the surface. \n\nThe large rock "face" that was previously observed is just weathered rocks when seen from another angle.
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Mercury has the thinnest, if any, atmosphere. It is not only a really small planet it is very close to the sun which is devastating to an atmosphere. It is possible Mercury has a thin atmosphere, like the moon, made up of sodium gas. Even if there where it would be blasted off of mercury, like it is on the moon, leaving an atmosphere so thin it is infact a more perfect vaccum than we can recreate here on earth. \n\nWe can see atmospheres on other planets when they pass by the sun or by distant stars. We see the atmosphere as a blurry boundary between the bright star and the planets disc.\n\nPluto has a very eccentric orbit around the sun and as it is (probably) made up of ice and rock (like a comet) when it´s orbit brings it closest to the sun (it gets closer then neptune) then part of its surface heats up, evaporates and becomes a thin atmosphere.
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Kilauea volcano, on the southernmost Island of Hawaii, is one of the most active on Earth. It predominantly erupts basaltic lava in effusive eruptions, although occasionally it experiences explosive eruptions as well. Kilauea sits on the southeasten side of the Big Island of Hawaii, resting on the flanks of it's larger neighbor volcano Manua Loa (see map at right). Kilauea stands just under 4200 feet tall at it's highest point. Kilauea has a 165m deep circular caldera at its summit that measures 3x5km (or 6x6 km, including the outermost ring faults). It is said that Kilauea is the home to Pele, the volcano goddess of ancient Hawaiian legends. \n    The current eruption of Kilauea (known as the Pu`u `O`o Eruption) started in Jan. 1983 and as of January 2000, had produced 1.9 km3of lava, had covered 102 km2, and had added 205 hectares to Kilauea's southern shore. In the process, lava flows unfortunately destroyed 181 houses and resurfaced 13 km of highway with as much as 25 m of lava. It has also destroyed a the National Park visitor center and a 700 year-old Hawaiian temple ("Waha'ula heiau"). There are no signs that the current eruption is slowing or will come to an end anytime soon.\n \n(~~)
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no. mercury is too small to have a powerfull enough pull to hold an atmosphere
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Where is the largest active volcano in the world? \n\nMauna Loa (Hawaii) is the world's largest active volcano, projecting 13,677 feet above sea level, its top being over 28,000 feet above the deep ocean floor. From its base below sea level to its summit, Mauna Loa is taller than Mount Everest. -- From: Tilling, 1985, Volcanoes: USGS General Interest Publication, and Brantley, 1994, Volcanoes of the United States: USGS General Interest Publication.
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http://en.wikipedia.org/wiki/Volcanos
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Shield volcanoes\n\nHawaii and Iceland are examples of places where volcanoes extrude huge quantities of lava that gradually build a wide mountain with a shield-like profile. Their lava flows are generally very hot and very fluid, contributing to long flows. The largest lava shield on Earth, Mauna Loa, rises over 9,000 m from the ocean floor, is 120 km in diameter and forms part of the Big Island of Hawaii. Olympus Mons is the largest shield volcano on Mars, and is the tallest mountain in the known solar system. Smaller versions of shield volcanoes include lava cones, and lava mounds.\n\nCinder cones\n\nVolcanic cones or cinder cones result from eruptions that throw out mostly small pieces of scoria and pyroclastics (both resemble cinders, hence the name of this volcano type) that build up around the vent. These can be relatively short-lived eruptions that produce a cone-shaped hill perhaps 30 to 400 m high. Most cinder cones erupt only once. Cinder cones may form as flank vents on larger volcanoes, or occur on their own. Paricutin in Mexico and Sunset Crater in Arizona are examples of cinder cones.\n\nStratovolcanoes\n\nThese are tall conical mountains composed of lava flows and other ejecta in alternate layers, the strata that give rise to the name. Stratovolcanoes are also known as composite volcanoes. Classic examples include Mt. Fuji in Japan, Mount Mayon in the Philippines, and Mount Vesuvius and Stromboli in Italy.\n\nSupervolcanoes\n\nSupervolcano is the popular term for large volcanoes that usually have a large caldera and can potentially produce devastation on an enormous, sometimes continental, scale. Such eruptions would be able to cause severe cooling of global temperatures for many years afterwards because of the huge volumes of sulfur and ash erupted that may block or partially block the sun. Examples include Yellowstone Caldera in Yellowstone National Park and Lake Toba in Sumatra, Indonesia. The Yellowstone volcano is the only dormant supervolcano in the world today. All the rest are long extinct. Supervolcanoes are hard to identify given their enormous areas covered. They are also known as flood basalt events due to the large amounts of basalt ejected.\n\nSubmarine volcanoes\n\nSubmarine volcanoes are common features on the ocean floor. Some are active and, in shallow water, disclose their presence by blasting steam and rocky debris high above the surface of the sea. Many others lie at such great depths that the tremendous weight of the water above them prevents the explosive release of steam and gases, although they can be detected by hydrophones and discoloration of water due to volcanic gases. Even large submarine eruptions may not disturb the ocean surface. Submarine volcanoes often form rather steep pillars and in due time, may break the ocean surface as new islands. Pillow lava is a common eruptive product of submarine volcanoes.\n\nSubglacial volcanoes\n\nSubglacial volcanoes develop underneath icecaps. They are made up of flat lava flows atop extensive pillow lavas and palagonite. When the icecap melts, the lavas on the top collapse leaving a flat-topped mountain. Then, the pillow lavas also collapse, giving an angle of 37.5 degrees. Very good examples of this can be seen in Iceland. These volcanoes are also called table volcanoes or mobergs.
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The biggest planet in the universe has not been discovered yet. However, of the three above, Jupiter is the largest.\n\nI'm not sure exactly, but I believe that a hydrogen planet 20 times Jupiter's mass would be the maximum size of a gaseous planet before it would begin nuclear fusion and become a star.
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the answer is a, mercury is much heavier than water and would require a heavier pressure tto reach the same altitude...i think..lol