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Solar System Survey - Lunar and Planetary Institute
... • May have a small solid core • Tumultuous atmospheres - rapid winds, large storms • Rotate relatively quickly Image: Lunar and Planetary Laboratory: http://solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=178 ...
... • May have a small solid core • Tumultuous atmospheres - rapid winds, large storms • Rotate relatively quickly Image: Lunar and Planetary Laboratory: http://solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=178 ...
Geochemistry of near-EPR seamounts: importance of source vs
... Sr = 0.702362^0.702951; 206 Pb/204 Pb = 18.080^19.325 and 143 Nd/144 Nd 0.512956^0.513183) larger than observed in lavas erupted on the nearby EPR axis. These isotopic ratios correlate with each other, with the abundances and ratios of incompatible elements, with the abundances of measured major ele ...
... Sr = 0.702362^0.702951; 206 Pb/204 Pb = 18.080^19.325 and 143 Nd/144 Nd 0.512956^0.513183) larger than observed in lavas erupted on the nearby EPR axis. These isotopic ratios correlate with each other, with the abundances and ratios of incompatible elements, with the abundances of measured major ele ...
(Cambridge: Cambridge University Press, 1988), 1-2, 37
... Alfred L. Wegener proposed in 1912 that all the continents had once been united, had broken apart, and had drifted through the ocean floor to their current locations. This 'Drift' theory' conflicted with the two prevailing views. 'Permanentists' believed that continents and ocean basins had remained ...
... Alfred L. Wegener proposed in 1912 that all the continents had once been united, had broken apart, and had drifted through the ocean floor to their current locations. This 'Drift' theory' conflicted with the two prevailing views. 'Permanentists' believed that continents and ocean basins had remained ...
mission design - Messenger - The Johns Hopkins University Applied
... Mercury is the closest planet to the Sun. Since it never strays far in the sky from the Sun’s glare, early astronomers had a difficult time viewing it, and considered it a "wandering star" appearing just before sunrise or just after sunset. Mercury travels around the Sun faster than any other planet ...
... Mercury is the closest planet to the Sun. Since it never strays far in the sky from the Sun’s glare, early astronomers had a difficult time viewing it, and considered it a "wandering star" appearing just before sunrise or just after sunset. Mercury travels around the Sun faster than any other planet ...
1.6 General age and tectonic setting of the Arabian Shield
... distant beginnings more than 2,000 million years ago to present day processes that are sculpting and changing the rocks and landscape of the shield. The core of the history covers a 300-million-year period between 850 Ma to 550 Ma during which most of the rocks of the shield developed by processes o ...
... distant beginnings more than 2,000 million years ago to present day processes that are sculpting and changing the rocks and landscape of the shield. The core of the history covers a 300-million-year period between 850 Ma to 550 Ma during which most of the rocks of the shield developed by processes o ...
The Jovian Planets
... – massive and cold, they can retain light elements like hydrogen and helium – their composition is like that of the stars – the smaller terrestrial planets are the abnormal planets in terms of composition ...
... – massive and cold, they can retain light elements like hydrogen and helium – their composition is like that of the stars – the smaller terrestrial planets are the abnormal planets in terms of composition ...
Save - Report Builder
... on Jupiter, either. Scientists believe Jupiter does not have a solid surface like Earth does. If you went to Jupiter, you would sink through its clouds. As you get closer to Jupiter’s core, the clouds get denser, or more pressed together. ...
... on Jupiter, either. Scientists believe Jupiter does not have a solid surface like Earth does. If you went to Jupiter, you would sink through its clouds. As you get closer to Jupiter’s core, the clouds get denser, or more pressed together. ...
Carl Sagan - Cosmos (1980) [Full Color Illustrated
... Reprinted by permission of J. M. Dent & Sons, Ltd. J. M. Dent & Sons, Ltd., and E. P. Dutton: Excerpt from Pensées by Blaise Pascal, translated by W. F. Trotter (An Everyman’s Library Series). Reprinted by permission of the publisher in the United States, E. P. Dutton, and the publisher in England, ...
... Reprinted by permission of J. M. Dent & Sons, Ltd. J. M. Dent & Sons, Ltd., and E. P. Dutton: Excerpt from Pensées by Blaise Pascal, translated by W. F. Trotter (An Everyman’s Library Series). Reprinted by permission of the publisher in the United States, E. P. Dutton, and the publisher in England, ...
New data on the deposition age of the volcano
... in the NW Namibia, another metamorphic event was reported for the Epembe Unit, dated at 1.6-1.45 Ga (Seth et al., 2003, 2005). It is assumed to be an early Mesoproterozoic orogenic event. The first age corresponds to the sedimentation and the second age to the granulite facies metamorphism. However, ...
... in the NW Namibia, another metamorphic event was reported for the Epembe Unit, dated at 1.6-1.45 Ga (Seth et al., 2003, 2005). It is assumed to be an early Mesoproterozoic orogenic event. The first age corresponds to the sedimentation and the second age to the granulite facies metamorphism. However, ...
Improving earth science instruction through visual organizers
... Reading is an important skill that all students need to be successful learners and scientifically literate citizens. Many students have trouble reading complex informational textbooks. One possible explanation for this is that content area textbooks are not written in a familiar text pattern because ...
... Reading is an important skill that all students need to be successful learners and scientifically literate citizens. Many students have trouble reading complex informational textbooks. One possible explanation for this is that content area textbooks are not written in a familiar text pattern because ...
Comprehensive search for natural satellites of Vesta by the Dawn
... et al., 1984). Dynamical modeling prior to the Dawn mission suggested an impact by a 42 km body, 1 billion years (byr) ago (Asphaug, 1997). Remarkably, crater size frequency distributions support this age (Schenk et al., 2012; Marchi et al., 2012). An alternate and older age determination of these b ...
... et al., 1984). Dynamical modeling prior to the Dawn mission suggested an impact by a 42 km body, 1 billion years (byr) ago (Asphaug, 1997). Remarkably, crater size frequency distributions support this age (Schenk et al., 2012; Marchi et al., 2012). An alternate and older age determination of these b ...
The tonalite–trondhjemite–granodiorite (TTG)
... Abstract: The 2.95–2.82 Ga quartzofeldspathic gneisses and granitoids in the Bighorn, western Owl Creek, and northeastern Wind River uplifts in the central Wyoming Province include low-K tonalite–trondhjemite–granodiorite (TTG) and high-K granodiorite–granite (GG) rocks. Both types of granitoids wer ...
... Abstract: The 2.95–2.82 Ga quartzofeldspathic gneisses and granitoids in the Bighorn, western Owl Creek, and northeastern Wind River uplifts in the central Wyoming Province include low-K tonalite–trondhjemite–granodiorite (TTG) and high-K granodiorite–granite (GG) rocks. Both types of granitoids wer ...
Midterm Review, Greenhouse LT, Small Bodies Astronomy 1 — Elementary Astronomy
... C. The Earth’s surface temperature would be the same temperature as it is today. D. There is not enough information to answer this question. Astronomy 1 - Elementary Astronomy ...
... C. The Earth’s surface temperature would be the same temperature as it is today. D. There is not enough information to answer this question. Astronomy 1 - Elementary Astronomy ...
Saturn - Heroku
... and, the planet saturn universe today - the farthest planet from the sun that can be observed with the naked eye the existence of saturn has been known for thousands of years and much like all celestial, cassini mission to saturn moons - saturn s moons range in size from smaller than a football stad ...
... and, the planet saturn universe today - the farthest planet from the sun that can be observed with the naked eye the existence of saturn has been known for thousands of years and much like all celestial, cassini mission to saturn moons - saturn s moons range in size from smaller than a football stad ...
The Mathematics of the Longitude
... With the invention of the chronometer, the Lunar distance method was being displaced completely. The introduction of the chronometer not only solved the problem of measuring longitude but also made possible more flexible methods of fixing position which did not involve finding latitude and longitude ...
... With the invention of the chronometer, the Lunar distance method was being displaced completely. The introduction of the chronometer not only solved the problem of measuring longitude but also made possible more flexible methods of fixing position which did not involve finding latitude and longitude ...
Moon Module - Science FEST
... Phases- any stage in a series or cycle of changes Revolution- the orbital motion of one object around another Rotation- the spinning of an object around its axis Orbit- the path of a celestial body during its revolution around another Gravity- the attractive effect that any massive object has on all ...
... Phases- any stage in a series or cycle of changes Revolution- the orbital motion of one object around another Rotation- the spinning of an object around its axis Orbit- the path of a celestial body during its revolution around another Gravity- the attractive effect that any massive object has on all ...
Neptune: The Last Gas Giant
... The surface of Triton is only 34.5K at this temperature methane, nitrogen, and carbon dioxide all freeze The surface also has few craters, inferring that the crust is relatively young. It is also the largest moon to revolve backward around its planet ...
... The surface of Triton is only 34.5K at this temperature methane, nitrogen, and carbon dioxide all freeze The surface also has few craters, inferring that the crust is relatively young. It is also the largest moon to revolve backward around its planet ...
The scattered disk population as a source of Oort cloud comets
... to study their dynamical evolution and the probability of falling in one of the following end states: reaching Jupiter’s influence zone, hyperbolic ejection, or transfer to the Oort cloud. We find that nearly 50% of the SDOs are transferred to the Oort cloud (i.e., they reach heliocentric distances ...
... to study their dynamical evolution and the probability of falling in one of the following end states: reaching Jupiter’s influence zone, hyperbolic ejection, or transfer to the Oort cloud. We find that nearly 50% of the SDOs are transferred to the Oort cloud (i.e., they reach heliocentric distances ...
Astronomy WHS Sow
... With the discovery during the latter half of the 20th century of more objects within the Solar System and large objects around other stars, disputes arose over what should constitute a planet. There was particular disagreement over whether an object should be considered a planet if it was part of a ...
... With the discovery during the latter half of the 20th century of more objects within the Solar System and large objects around other stars, disputes arose over what should constitute a planet. There was particular disagreement over whether an object should be considered a planet if it was part of a ...
THE IRREGULAR SATELLITES: THE MOST COLLISIONALLY
... The known irregular satellites of the giant planets are dormant comet-like objects that reside on stable prograde and retrograde orbits in a realm where planetary perturbations are only slightly larger than solar ones. Their size distributions and total numbers are surprisingly comparable to one ano ...
... The known irregular satellites of the giant planets are dormant comet-like objects that reside on stable prograde and retrograde orbits in a realm where planetary perturbations are only slightly larger than solar ones. Their size distributions and total numbers are surprisingly comparable to one ano ...
Issue #11 - 2015 April - National Space Society
... SpaceX and Boeing are vying to become the first private firms to fly astronauts to the International Space Station for NASA sometime in 2017. NASA chose both companies as part of the agency's commercial crew program, which may end NASA's current sole reliance on Russian vehicles to get astronauts to ...
... SpaceX and Boeing are vying to become the first private firms to fly astronauts to the International Space Station for NASA sometime in 2017. NASA chose both companies as part of the agency's commercial crew program, which may end NASA's current sole reliance on Russian vehicles to get astronauts to ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
Late Heavy Bombardment
![](https://commons.wikimedia.org/wiki/Special:FilePath/Lunar_cataclysm.jpg?width=300)
The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.