Ultra Deep Survey for Irregular Satellites of Uranus: Limits to
... The Subaru survey observations were obtained when Uranus was near opposition, where the apparent movement is largely parallactic and thus is inversely related to the distance. Objects at the heliocentric distance of Uranus, R ∼ 20 AU, will have an apparent motion of about ∼ 6′′ hr−1 (∼ 30 pixels per ...
... The Subaru survey observations were obtained when Uranus was near opposition, where the apparent movement is largely parallactic and thus is inversely related to the distance. Objects at the heliocentric distance of Uranus, R ∼ 20 AU, will have an apparent motion of about ∼ 6′′ hr−1 (∼ 30 pixels per ...
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... in an M star’s habitable zone (0.02–0.2 AU) (Tarter et al. 2007) would be habitable as long as liquid water and the chemical constituents necessary for the emergence of life were present on them for a sufficiently long period of time. Furthermore, Segura et al. (2010) concluded that the flares emitt ...
... in an M star’s habitable zone (0.02–0.2 AU) (Tarter et al. 2007) would be habitable as long as liquid water and the chemical constituents necessary for the emergence of life were present on them for a sufficiently long period of time. Furthermore, Segura et al. (2010) concluded that the flares emitt ...
SESSIONE TS1.3 Processi magmatici e metamorfici nella crosta
... limited enrichment in HfO2 (up to 1.5 %), suggesting crystallization in a slightly more evolved magma. The bright areas also have HfO2 between 1.1 and 1.5, but Y2O3 does not exceed 0.2 %; UO2 is always < 0.05 % and ThO2 almost absent; they could represent “recrystallization fronts” formed during hig ...
... limited enrichment in HfO2 (up to 1.5 %), suggesting crystallization in a slightly more evolved magma. The bright areas also have HfO2 between 1.1 and 1.5, but Y2O3 does not exceed 0.2 %; UO2 is always < 0.05 % and ThO2 almost absent; they could represent “recrystallization fronts” formed during hig ...
joseph barrell - National Academy of Sciences
... Washington. He had but two sons, and one of them, John, also a cooper by trade, married Mary, daughter of William Colburn, one of the twelve original founders of the colony. It is from this union that all of the American Barrells of colonial origin have sprung. Until recently, the Barrells have been ...
... Washington. He had but two sons, and one of them, John, also a cooper by trade, married Mary, daughter of William Colburn, one of the twelve original founders of the colony. It is from this union that all of the American Barrells of colonial origin have sprung. Until recently, the Barrells have been ...
New Extreme Trans-Neptunian Objects: Towards a Super
... The main parameters identified by TS2014 for the distant outer planet were a mass between 2 and 15 Earth masses with a distance beyond 200 AU, with a highly inclined 1500 AU orbit being possible. TS2014 suggested that a more comprehensive, wider orbital parameter analysis would put tighter constrain ...
... The main parameters identified by TS2014 for the distant outer planet were a mass between 2 and 15 Earth masses with a distance beyond 200 AU, with a highly inclined 1500 AU orbit being possible. TS2014 suggested that a more comprehensive, wider orbital parameter analysis would put tighter constrain ...
Lewisian, Torridonian and Moine Rocks of Scotland
... they are fully covered in GCR Volume 18, British Cambrian to Ordovician Stratigraphy (Rushton et al., 2000). Numerous Ordovician to Devonian igneous rocks also occur within the area of this GCR volume: many of these are described in detail in GCR Volume 17, Caledonian Igneous Rocks of Great Britain ...
... they are fully covered in GCR Volume 18, British Cambrian to Ordovician Stratigraphy (Rushton et al., 2000). Numerous Ordovician to Devonian igneous rocks also occur within the area of this GCR volume: many of these are described in detail in GCR Volume 17, Caledonian Igneous Rocks of Great Britain ...
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... 59 wt %) (Supplementary Data Fig. A5, Appendix A). The lavas have moderately high abundances of LILE and light REE (LREE) (e.g. average La and Th concentrations are 1387 and 289 ppm respectively) and correspondingly low Yb and Y contents of 05–09 and 54– 128 ppm to give an average La/Yb ratio ...
... 59 wt %) (Supplementary Data Fig. A5, Appendix A). The lavas have moderately high abundances of LILE and light REE (LREE) (e.g. average La and Th concentrations are 1387 and 289 ppm respectively) and correspondingly low Yb and Y contents of 05–09 and 54– 128 ppm to give an average La/Yb ratio ...
Sun Moon and Planets Binder
... Students will be able to… a) Gather, analyze, and interpret data about components of the Solar System. b) Utilize direct and indirect evidence to investigate the components of the Solar System. c) Gat ...
... Students will be able to… a) Gather, analyze, and interpret data about components of the Solar System. b) Utilize direct and indirect evidence to investigate the components of the Solar System. c) Gat ...
provenance analysis and detrital zircons: keys to - ETH E
... sedimentary rocks in these accretionary complexes permits understanding the Cretaceous to Paleogene geological evolution, the geodynamic context and the tectonic-sedimentation relationships. The multidisciplinary provenance study, including sandstone framework, heavy mineral analysis, in situ U-Pb d ...
... sedimentary rocks in these accretionary complexes permits understanding the Cretaceous to Paleogene geological evolution, the geodynamic context and the tectonic-sedimentation relationships. The multidisciplinary provenance study, including sandstone framework, heavy mineral analysis, in situ U-Pb d ...
The Moon - Learn360
... • Fast Facts are designed to give your students a quick overview of the information presented within the video. • Before Viewing Activities help identify what students already know about the subject, what they are curious about, and what they hope to learn. • During Viewing Activities may be used du ...
... • Fast Facts are designed to give your students a quick overview of the information presented within the video. • Before Viewing Activities help identify what students already know about the subject, what they are curious about, and what they hope to learn. • During Viewing Activities may be used du ...
The Origin of Planetary Ring Systems
... In fact, in the simulations of Salmon et al. (2010), the surface density profile of the rings converges naturally to a profile which makes Q = 2 everywhere (where Q is defined by Eq. (18.1) ). This occurs because in the Daisaka et al. (2001) prescription, the gravitational component of viscosity is ...
... In fact, in the simulations of Salmon et al. (2010), the surface density profile of the rings converges naturally to a profile which makes Q = 2 everywhere (where Q is defined by Eq. (18.1) ). This occurs because in the Daisaka et al. (2001) prescription, the gravitational component of viscosity is ...
Superposed Fault Systems of the Southernmost
... orogeny; Mark Groszos, my colleague at Valdosta State University who shared his knowledge of the southern Appalachians during our daily commute between Tallahassee and Valdosta; and David Allison at the University of South Alabama, who has been an endless source of information regarding the geology ...
... orogeny; Mark Groszos, my colleague at Valdosta State University who shared his knowledge of the southern Appalachians during our daily commute between Tallahassee and Valdosta; and David Allison at the University of South Alabama, who has been an endless source of information regarding the geology ...
Did westward subduction cause Cretaceous
... identified superterranes (Monger et al., 1982; Johnston, 2001, 2008), plus new additions, within the Canadian and American sectors of the orogen. In this new model for the Cordillera, western North America was a passive continental margin from the latest Precambrian until about 124 Ma, when its oute ...
... identified superterranes (Monger et al., 1982; Johnston, 2001, 2008), plus new additions, within the Canadian and American sectors of the orogen. In this new model for the Cordillera, western North America was a passive continental margin from the latest Precambrian until about 124 Ma, when its oute ...
The Rhythm of Time The evolution of the calendar
... the earth’s rotation about its axis, the moon’s revolution around the earth and the earth’s revolution around the sun – or its movement with respect to the stars. No convenient way to relate these three concepts of time: A solar year ∼ 365.25 days ; lunar month ∼ 29.53 days Twelve lunar months ∼ 354 ...
... the earth’s rotation about its axis, the moon’s revolution around the earth and the earth’s revolution around the sun – or its movement with respect to the stars. No convenient way to relate these three concepts of time: A solar year ∼ 365.25 days ; lunar month ∼ 29.53 days Twelve lunar months ∼ 354 ...
Fast-decaying IP in frozen unconsolidated rocks and potentialities
... in the time range from a few tens to a few hundreds of microseconds. These early time distortions (Fig. 1) were initially considered to be noise, hampering the inversion of TEM signals in terms of the ‘normal’ conductivity. It has been proposed that these distortions were caused by the fast-decaying ...
... in the time range from a few tens to a few hundreds of microseconds. These early time distortions (Fig. 1) were initially considered to be noise, hampering the inversion of TEM signals in terms of the ‘normal’ conductivity. It has been proposed that these distortions were caused by the fast-decaying ...
Mantle Exhumation in an Early Paleozoic Passive Margin, Northern
... the spinel-plagioclase peridotite facies boundary at ∼0.7 GPa. The troctolite boudins record cooling to 850⬚C through the same facies reaction at ∼0.8 GPa. In an aureole surrounding the peridotite body, the mainly quartzofeldspathic country rock contains leucosome with garnet, orthopyroxene, and sil ...
... the spinel-plagioclase peridotite facies boundary at ∼0.7 GPa. The troctolite boudins record cooling to 850⬚C through the same facies reaction at ∼0.8 GPa. In an aureole surrounding the peridotite body, the mainly quartzofeldspathic country rock contains leucosome with garnet, orthopyroxene, and sil ...
Pluto`s Identity Crisis
... thick clouds that Pluto did not share. For Saturn it was rings that glistened silver and gold in the light of the Sun. For Jupiter it was size. Earth pointed out that its dinosaurs all depended on green leaves that ultimately depended on the energy of the Sun. Venus was pleased to show how bright th ...
... thick clouds that Pluto did not share. For Saturn it was rings that glistened silver and gold in the light of the Sun. For Jupiter it was size. Earth pointed out that its dinosaurs all depended on green leaves that ultimately depended on the energy of the Sun. Venus was pleased to show how bright th ...
Planetary migration in a planetesimal disk: why did
... migrate outward, while Jupiter migrates inward. Neptune undergoes forced migration because these disks are massive. Consequently, the planet eventually migrates to the edge of the disk (and in fact goes slightly beyond it), and it can come to a rest only when the disk has been mostly depleted (which ...
... migrate outward, while Jupiter migrates inward. Neptune undergoes forced migration because these disks are massive. Consequently, the planet eventually migrates to the edge of the disk (and in fact goes slightly beyond it), and it can come to a rest only when the disk has been mostly depleted (which ...
Trans-Neptunian Objects as Natural Probes to the Unknown Solar System
... Abstract Trans-Neptunian objects (TNOs) are icy/rocky bodies that move beyond the orbit of Neptune in a region known as the trans-Neptunian belt (or Edgeworth-Kuiper belt). TNOs are believed to be the remnants of a collisionally, dynamically and chemically evolved protoplanetary disk composed of bil ...
... Abstract Trans-Neptunian objects (TNOs) are icy/rocky bodies that move beyond the orbit of Neptune in a region known as the trans-Neptunian belt (or Edgeworth-Kuiper belt). TNOs are believed to be the remnants of a collisionally, dynamically and chemically evolved protoplanetary disk composed of bil ...
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... (Table 2). Maruyama and Liou (1998) suggested that perhaps 20% of the area of all orogenic belts formed between 0.7 and 0.6 Ga. Table 4 of Artemieva (2006) splits late Precambrian time between two informal time periods, 750–550 Ma (11.7% of continental area) and 1.15–750 Ma (9.4%), so at least a ten ...
... (Table 2). Maruyama and Liou (1998) suggested that perhaps 20% of the area of all orogenic belts formed between 0.7 and 0.6 Ga. Table 4 of Artemieva (2006) splits late Precambrian time between two informal time periods, 750–550 Ma (11.7% of continental area) and 1.15–750 Ma (9.4%), so at least a ten ...
ASTR 1010 - Sommers-Bausch Observatory
... Strictly speaking, the conversion between kilograms and pounds is valid only on the Earth, because kilograms measure mass while pounds measure weight. However, since most of you will be remaining on the Earth for the foreseeable future, we will not yet dwell on this detail here. (Strictly, the unit ...
... Strictly speaking, the conversion between kilograms and pounds is valid only on the Earth, because kilograms measure mass while pounds measure weight. However, since most of you will be remaining on the Earth for the foreseeable future, we will not yet dwell on this detail here. (Strictly, the unit ...
Planetary magnetic fields: Observations and models
... fields in the past, e.g., the angrite meteorite parent body (Weiss et al., 2008) and possibly some outer solar system objects other than Ganymede have a magnetic field at present. It is expected that many of the extrasolar planets now being detected have magnetic fields and some observations support th ...
... fields in the past, e.g., the angrite meteorite parent body (Weiss et al., 2008) and possibly some outer solar system objects other than Ganymede have a magnetic field at present. It is expected that many of the extrasolar planets now being detected have magnetic fields and some observations support th ...
Late Heavy Bombardment
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.