Containing less than 1% of the mass in the solar system, it's the second most massive object in it
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Planets of our Solar System :: The Planets Today  A description of each of the solar system planets and the history of our ... Mercury is quite small with a diameter of 4,878km, (2/5ths that of Earth) and only 5% of ... However its magnetic field is much weaker than the Earth's (1% as strong). ... Venus is the second closest planet to the Sun and orbits in an almost circular orbit at...
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List of Solar System objects by size - Wikipedia  This is a partial list of Solar System objects by size, arranged in descending order of mean volumetric radius, and subdivided into several size classes. These lists can also be sorted according to an object's mass and, for the ... Solar System objects more massive than 1021 kilograms (one yottagram [Yg]) are known or...
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The Sun - Educational facts and history of the star we call The Sun.  The Sun is by far the largest object in the solar system. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most ... Our Sun is a normal main-sequence G2 star, one of more than 100 billion stars in our galaxy. ... This changes slowly over time as the Sun converts hydrogen to helium in its core.
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Your Weight on Other Planets - The Solar System on Sea and Sky  Page 1 of 1 ... The mass of an object is a measure of how much matter it contains. ... More massive objects have a stronger pull than less massive objects. ... and its surface is so far from its center, that the pull of gravity is weaker at its surface.
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Law of Gravity - Physics  Thus, by Newton's 2nd Law there must be a force that acts on the apple to cause this ... Thus, the weight of an object of mass m at the surface of the Earth is ... of the Moon because the gravitational acceleration there is a factor of 6 less than at the ... The planet Jupiter is more than 300 times as massive as Earth, so it might...
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Asteroids: Zoom Astronomy - Enchanted Learning  Mathilde is about 60 km in diameter and orbits in the asteroid belt between Mars and Jupiter. ... Asteroids are also known as planetoids or minor planets. ... These gaps are orbital radii where the gravitational forces from Jupiter do not let ... The first one discovered (and the biggest) is named Ceres; it was discovered in 1801.
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10th Planet has a Moon - Universe Today  Mar 24, 2013 ... Nicknamed "Gabrielle", this moon is 100 times fainter than Xena, and ... after the TV warrior princess), and a Guinness Book-ish record of its own ... miles from the sun-it is the solar system's farthest detected object). ... of the sky, making faint detections possible, says Marcos van Dam, ... Your Email Address
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Minor planet - Wikipedia  A minor planet is an astronomical object in direct orbit around the Sun that is neither a planet nor exclusively classified as a comet. Minor planets can be dwarf planets, asteroids, trojans, centaurs, Kuiper belt ... Near-Earth asteroids, those whose orbits take them inside the orbit of Mars. Further subclassification of these,...
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Titan - Overview | Planets - NASA Solar System Exploration  Saturn's largest moon Titan is the second largest moon in our solar system, second ... Titan is bigger than Earth's moon, and even larger than the planet Mercury. ... Because Titan is less massive than Earth, its gravity doesn't hold onto its ... of smog - a thick, orange-colored haze that obscures the moon's surface from view.
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How Dense Are The Planets? - Universe Today  Feb 18, 2016 ... The eight planets of our Solar System vary widely, not only in terms ... While these planets are greater in size and mass, their overall density is much lower. ... Earth has the highest density of any planet in the Solar System, at 5.514 g/cm3. ... Jupiter has a lower mean density than any of the terrestrial planets.
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Saturn's Ring System - Facts for Now - Scholastic  Even without its ring system, Saturn is an impressive planet. The second largest planet in the solar system, it is an enormous ball with a diameter nine times greater than ... the atmosphere, the ammonia and methane also condense, forming the thick .... But most of Saturn's moons measure less than 12 miles (20 kilometers)...
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Jupiter - Wikipedia  Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet ... Jupiter moving out of the inner Solar System would have allowed the ... 1.326 g/cm3, is the second highest of the giant planets, but lower than those of ... Neon in the upper atmosphere only consists of 20 parts per million by mass,...
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Solar System - Wikipedia  The remaining objects of the Solar System (including the four terrestrial planets, the dwarf planets, moons, asteroids, and comets) together comprise less than...
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Free Flashcards about ASTRONOMY - StudyStack  VOYAGER II DISCOVERED 6 MORE MOONS AROUND THIS PLANET; ONE IS BIGGER .... A 1991 PHOTO OF GASPRA TAKEN BY THE GALILEO PROBE WAS THE FIRST CLOSE-UP OF ONE OF THESE MINOR PLANETS, ASTEROID.
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Free Flashcards about ASTRONOMY - StudyStack  IT'S THE ONLY PLANET IN THE SOLAR SYSTEM WITH EXACTLY 2 MOONS, MARS .... DUE TO ITS THICK ONE OF THESE, SATURN'S TITAN WAS ONCE THOUGHT TO BE THE SOLAR SYSTEM'S ... ITS RING SYSTEM IS MORE THAN 170,000 MILES IN DIAMETER, BUT ONLY ABOUT A MILE THICK, SATURN.
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Space Today Online -- Exploring the Solar System Planet Pluto  It's one of the most mysterious objects in our Solar System because it's the farthest ... In 1999, it crossed Neptune's path to again become the Solar System's most ... the spacecraft then will fly on to pass by one or more of the icy asteroid-sized ... The 2006 New Horizons blastoff from Earth is the last launch opportunity for...
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Planets of our Solar System :: The Planets Today  A description of each of the solar system planets and the history of our knowledge of them. ... It has a highly cratered rocky surface and is known to have an iron core. ... has been mapped using radar and it is known that is is covered by large flat .... However its mass is only a tenth of Earth's with gravity on the surface being...
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Asteroids and Comets - Remote Sensing @ CES  This is explained by assuming the body is so close to the Earth that its motion ... Among the Main Belt asteroids the biggest is Ceres (933 km [583 miles]); second .... with a short tail); of the estimated 400 Centaur objects greater than 100 km in ... spacecraft named Giotto, which came within 540 km (336 mi) of the nucleus on...
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Saturn Facts - The Planet Saturn - Saturn For Kids - Planets For Kids  Saturn is the sixth planet in the Solar system and, when seen through a ... Saturn is the last planet that can be seen without using a telescope or binoculars and the ... Titan, is the 2nd largest in the Solar system, after Jupiter's moon, Ganymede. ... Its mass is 95 times that of the Earth and it has a diameter of 75,098 miles,...
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What are the Different Masses of the Planets? - Universe Today  Jun 25, 2016 ... But a planet's size is not necessarily proportional to its mass. ... or Saturn's moon Titan, it is more than twice as massive than they are. ... all the other planets in the Solar System combined  2.5 times more massive, to be exact.
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Rhea (moon) - Wikipedia  Rhea is the second-largest moon of Saturn and the ninth-largest moon in the Solar System. It is the second smallest body in the Solar System, after the asteroid and dwarf planet Ceres, ... Rhea is named after the Titan Rhea of Greek mythology, the "mother of the gods". It is also designated Saturn V (being the fifth major...