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MESSENGER - AstroArts
... behind a sunshade of heat-resistant ceramic fabric. The 1.2-ton spacecraft also features a heat-radiation system and will pass only briefly over Mercury’s hottest regions, limiting exposure to the intense heat bouncing back from the broiling surface. “We’re doing something no one has ever tried befo ...
... behind a sunshade of heat-resistant ceramic fabric. The 1.2-ton spacecraft also features a heat-radiation system and will pass only briefly over Mercury’s hottest regions, limiting exposure to the intense heat bouncing back from the broiling surface. “We’re doing something no one has ever tried befo ...
3 - Blinklearning
... 1.1. The origin of the Earth Before starting this section, remind students about the concepts of density and gravity. It will help them to understand clearly the origin of our planet. It is important that students differentiate the concepts of density and mass. Otherwise, they will not be able to un ...
... 1.1. The origin of the Earth Before starting this section, remind students about the concepts of density and gravity. It will help them to understand clearly the origin of our planet. It is important that students differentiate the concepts of density and mass. Otherwise, they will not be able to un ...
Earth Science
... While these practices and crosscutting concepts are crucial to your overall success in science, in order to be most meaningful they do need some context. This is where the study of disciplinary core ideas are most impactful. If you study Earth Science or any other scientific discipline without the c ...
... While these practices and crosscutting concepts are crucial to your overall success in science, in order to be most meaningful they do need some context. This is where the study of disciplinary core ideas are most impactful. If you study Earth Science or any other scientific discipline without the c ...
PowerPoint Presentation - Report from the Oort
... Luke Dones Hal Levison Paul Weissman Martin Duncan ...
... Luke Dones Hal Levison Paul Weissman Martin Duncan ...
Why are dense planetary rings only found between 8 and 20 AU?
... effective strengths well below 100 N/m2 (Thomas et al. 2013). Aldditionally, this number is comparable to the estimated strengths of rubble pile asteroids (Sánchez & Scheeres 2014). Thus it is not unreasonable to suppose that the material in Saturn’s and Uranus’ rings is much weaker than the materi ...
... effective strengths well below 100 N/m2 (Thomas et al. 2013). Aldditionally, this number is comparable to the estimated strengths of rubble pile asteroids (Sánchez & Scheeres 2014). Thus it is not unreasonable to suppose that the material in Saturn’s and Uranus’ rings is much weaker than the materi ...
Instructors` Guide
... Arrange all of the ingredients to build a comet on a large surface where students will not be working and where the comet will be clearly visible. Cover the surface with one garbage bag and then line the bowl with the other garbage bag. Discussion Activity and Questions: Begin by building a comet. A ...
... Arrange all of the ingredients to build a comet on a large surface where students will not be working and where the comet will be clearly visible. Cover the surface with one garbage bag and then line the bowl with the other garbage bag. Discussion Activity and Questions: Begin by building a comet. A ...
Pseudotachylytes, related fault rocks, asperities, and crustal structures in the
... were produced by co-seismic fracturing or aseismic deformation under the same stress field as the layer-oblique pseudotachylytes. On the basis of the present preliminary structural analysis, the layer-parallel pseudotachylytes appear to have been formed by a sinistral-slip movement before the Dpt-st ...
... were produced by co-seismic fracturing or aseismic deformation under the same stress field as the layer-oblique pseudotachylytes. On the basis of the present preliminary structural analysis, the layer-parallel pseudotachylytes appear to have been formed by a sinistral-slip movement before the Dpt-st ...
2.01 Cosmochemical Estimates of Mantle Composition
... The rocky planets of the inner solar system and the gas-rich giant planets with their icy satellites of the outer solar system constitute the gross structure of the solar system: material poor in volatile components occurs near the Sun, while the outer parts are rich in water and other volatile comp ...
... The rocky planets of the inner solar system and the gas-rich giant planets with their icy satellites of the outer solar system constitute the gross structure of the solar system: material poor in volatile components occurs near the Sun, while the outer parts are rich in water and other volatile comp ...
Pluto Moon Discovered
... probably born together. This would be the case if the moons formed in a single titanic collision between Pluto and another Kuiper belt object billions of years ago. This collision scenario is supported by increasingly sophisticated computer simulations that predict the aftermath of such planetary en ...
... probably born together. This would be the case if the moons formed in a single titanic collision between Pluto and another Kuiper belt object billions of years ago. This collision scenario is supported by increasingly sophisticated computer simulations that predict the aftermath of such planetary en ...
On the formation of Uranus and Neptune
... present epoch, showing the giant planets and those Kuiper belt objectç which have been observed a t multiple oppositions. The w e in the top panel shows the locus of orbits with perihelia at the semimajor axïs of Neptune. . . . . . . . . . . . . . . . The initial state for runs in Set 1,showing ecce ...
... present epoch, showing the giant planets and those Kuiper belt objectç which have been observed a t multiple oppositions. The w e in the top panel shows the locus of orbits with perihelia at the semimajor axïs of Neptune. . . . . . . . . . . . . . . . The initial state for runs in Set 1,showing ecce ...
earth science sol review game - pams
... If it is 10 am at location D, what time would it be at location B? a. 10 am b. 11:30 am c. 2 pm d. 6 am • Answer: d ...
... If it is 10 am at location D, what time would it be at location B? a. 10 am b. 11:30 am c. 2 pm d. 6 am • Answer: d ...
Solar System Overview - Lunar and Planetary Institute
... Images from LPI: http://www.lpi.usra.edu/education/timeline/gallery/slide_17.html and http://www.lpi.usra.edu/education/timeline/gallery/slide_47.html ...
... Images from LPI: http://www.lpi.usra.edu/education/timeline/gallery/slide_17.html and http://www.lpi.usra.edu/education/timeline/gallery/slide_47.html ...
File - Mrs. LeGrow`s Class
... has blocked out the sun and left part of the moon in darkness. Eclipses do not happen often because the sun, Earth, and the moon all have to line up just right. Solar eclipses can only be seen from a narrow strip of Earth at a time. While they happen once or twice a year, it is very, very rare to se ...
... has blocked out the sun and left part of the moon in darkness. Eclipses do not happen often because the sun, Earth, and the moon all have to line up just right. Solar eclipses can only be seen from a narrow strip of Earth at a time. While they happen once or twice a year, it is very, very rare to se ...
EESUnit 2 With LEP (6-27-08)
... Assuming responsibility for own learning Persisting until job is completed Working independently Developing career interest/goals Responding to criticism or questions Information-retrieval Skills Searching for information via the computer Searching for print information Searching for information usi ...
... Assuming responsibility for own learning Persisting until job is completed Working independently Developing career interest/goals Responding to criticism or questions Information-retrieval Skills Searching for information via the computer Searching for print information Searching for information usi ...
accepted manuscript
... emplacement time of ophiolites, the mechanism of exhumation of high-pressure rocks, the structure of accretionary prisms, and the time of ocean closure and terminal collision (Xiao et al., 2004, 2009a; Li, 2006; Jian et al., 2008, 2010; Johnson et al., 2008; Ao et al., 2012; Long et al., 2012a, b; M ...
... emplacement time of ophiolites, the mechanism of exhumation of high-pressure rocks, the structure of accretionary prisms, and the time of ocean closure and terminal collision (Xiao et al., 2004, 2009a; Li, 2006; Jian et al., 2008, 2010; Johnson et al., 2008; Ao et al., 2012; Long et al., 2012a, b; M ...
Geochemistry and petrogenesis of extrusive rocks, dykes and high
... 1997), and its geochemical evolution is dominated by FeTi-basalts, a typical feature displayed at short distances (0-100 km) behind active propagating rift tips (Furnes et al. 1998). The ophiolite pseudostratigraphic units on Oldra are, from bottom to top: vari-textured and fine-to-medium grained g ...
... 1997), and its geochemical evolution is dominated by FeTi-basalts, a typical feature displayed at short distances (0-100 km) behind active propagating rift tips (Furnes et al. 1998). The ophiolite pseudostratigraphic units on Oldra are, from bottom to top: vari-textured and fine-to-medium grained g ...
Astronomy Lessons - Duke Mathematics Department
... they manage to “fall” while maintaining a constant distance from the planet. One can explain the motion of an object in orbit as a continual fall in which the Earth (or whatever is being orbited) is forever being “missed” and “overshot.” In this way the Moon is forever falling to Earth as it orbits, ...
... they manage to “fall” while maintaining a constant distance from the planet. One can explain the motion of an object in orbit as a continual fall in which the Earth (or whatever is being orbited) is forever being “missed” and “overshot.” In this way the Moon is forever falling to Earth as it orbits, ...
Astronomy Lessons - Duke Math
... they manage to “fall” while maintaining a constant distance from the planet. One can explain the motion of an object in orbit as a continual fall in which the Earth (or whatever is being orbited) is forever being “missed” and “overshot.” In this way the Moon is forever falling to Earth as it orbits, ...
... they manage to “fall” while maintaining a constant distance from the planet. One can explain the motion of an object in orbit as a continual fall in which the Earth (or whatever is being orbited) is forever being “missed” and “overshot.” In this way the Moon is forever falling to Earth as it orbits, ...
Minor Jovian Satellites & Rings
... All of the 16 satellites inside Iapetus have near circular orbits, within 2° of the plane of Saturn’s equator and rings, and all orbiting in the same direction. We can therefore suggest that they formed along with Saturn. Some of the tiny ones (see later) may have been prevented from accreting to l ...
... All of the 16 satellites inside Iapetus have near circular orbits, within 2° of the plane of Saturn’s equator and rings, and all orbiting in the same direction. We can therefore suggest that they formed along with Saturn. Some of the tiny ones (see later) may have been prevented from accreting to l ...
the Scanned PDF
... depending on the original composition. The intrusion contains some inclusions of diorite and granodiorite showing varying degreesof modification by the enclosing granite, which is itself contaminated in their vicinity, but contamination of granite by Moine, or inclusion of Moine xenoliths in granite ...
... depending on the original composition. The intrusion contains some inclusions of diorite and granodiorite showing varying degreesof modification by the enclosing granite, which is itself contaminated in their vicinity, but contamination of granite by Moine, or inclusion of Moine xenoliths in granite ...
Astro Review - Parkway C-2
... 67. Which stars are composed of matter in which electrons have combined with protons? 68. A comet’s tail always points ____. 69. The measure of a star’s brightness is called its ____. 70. The sun can continue to exist in its present stable state for about another ____. 71. By observing sunspots, Ga ...
... 67. Which stars are composed of matter in which electrons have combined with protons? 68. A comet’s tail always points ____. 69. The measure of a star’s brightness is called its ____. 70. The sun can continue to exist in its present stable state for about another ____. 71. By observing sunspots, Ga ...
swisseph - Astrodienst
... In search of correct algorithms ...................................................................................................................... 38 More benefits from our new sidereal algorithms: standard equinoxes and precession-corrected transits ..... 41 ...
... In search of correct algorithms ...................................................................................................................... 38 More benefits from our new sidereal algorithms: standard equinoxes and precession-corrected transits ..... 41 ...
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.