![Evolution of Comets Into Asteroids - SwRI Boulder](http://s1.studyres.com/store/data/006925551_1-364bd0a28394fb40b3dc33d8f6972a03-300x300.png)
Evolution of Comets Into Asteroids - SwRI Boulder
... The problem is not a simple one. The chaotic nature of the dynamical evolution of objects in planet-crossing orbits, as well as nongravitational accelerations on comets caused by outgassing, make it impossible to track orbits accurately backwards (or forwards) in time more than a few decades to cent ...
... The problem is not a simple one. The chaotic nature of the dynamical evolution of objects in planet-crossing orbits, as well as nongravitational accelerations on comets caused by outgassing, make it impossible to track orbits accurately backwards (or forwards) in time more than a few decades to cent ...
ASTR 110 Lab Manual Sections M02 M03 M04
... “2” above the three. 52 = 5 × 5 = 25. The exponent tells you how many times to multiply that number by itself: 84 = 8 × 8 × 8 × 8 = 4096. The square of a number simply means the exponent is 2 (three squared = 32 ), and the cube of a number means the exponent is three (four cubed = 43 ). Here are som ...
... “2” above the three. 52 = 5 × 5 = 25. The exponent tells you how many times to multiply that number by itself: 84 = 8 × 8 × 8 × 8 = 4096. The square of a number simply means the exponent is 2 (three squared = 32 ), and the cube of a number means the exponent is three (four cubed = 43 ). Here are som ...
Pluto, the dwarf planet
... gradually fill in a crater, the way loose rock, dirt and vegetation do here on Earth. Charon was also studied in detail. Its diameter came out slightly larger than expected, at 753 miles. Mountains seen on this moon suggest that it, like Pluto, has water ice that runs deep in its structure, though th ...
... gradually fill in a crater, the way loose rock, dirt and vegetation do here on Earth. Charon was also studied in detail. Its diameter came out slightly larger than expected, at 753 miles. Mountains seen on this moon suggest that it, like Pluto, has water ice that runs deep in its structure, though th ...
Abiotic formation of O2 and O3 in high
... Earth-like planets all had significant volcanic sinks for oxygen, and so none of these cases produced high O2 or O3 . However, their “early Mars-type” planet (Case B2), which assumed zero volcanic outgassing, exhibited 0.1 PAL of O2 and a “super” ozone layer with a column depth of ∼ 0.7 atm cm – rou ...
... Earth-like planets all had significant volcanic sinks for oxygen, and so none of these cases produced high O2 or O3 . However, their “early Mars-type” planet (Case B2), which assumed zero volcanic outgassing, exhibited 0.1 PAL of O2 and a “super” ozone layer with a column depth of ∼ 0.7 atm cm – rou ...
Powerpoint Presentation (large file)
... • They are the only worlds in the solar system not yet visited by spacecraft ...
... • They are the only worlds in the solar system not yet visited by spacecraft ...
Michael John O`Hara. 22 February 1933
... Mike attended a convent school in Bournemouth and an infant school in Pwllheli between 1939 and 1940. In 1940–41 he was at the Troederach school, a Welsh-language primary school in Pwllheli. This was a bad year for young Mike. He was bullied in Welsh and could not understand exactly what the arithme ...
... Mike attended a convent school in Bournemouth and an infant school in Pwllheli between 1939 and 1940. In 1940–41 he was at the Troederach school, a Welsh-language primary school in Pwllheli. This was a bad year for young Mike. He was bullied in Welsh and could not understand exactly what the arithme ...
Anorthosite and the lower crust
... In the classical model acidic rocks are produced by contact anatexis of crustal rocks surrounding the deep seated magma chamber. In our views this is no more the only possibility: jotunite magmas, parental to andesine anorthosite, can differentiate up to acidic melts. A well-defined liquid line of d ...
... In the classical model acidic rocks are produced by contact anatexis of crustal rocks surrounding the deep seated magma chamber. In our views this is no more the only possibility: jotunite magmas, parental to andesine anorthosite, can differentiate up to acidic melts. A well-defined liquid line of d ...
Regents Earth Science Curriculum
... Describe current theories about the origin of the universe and solar system. ...
... Describe current theories about the origin of the universe and solar system. ...
Pluto: Dwarf Planet - ASTR101
... mountains rising about 11,000 feet • They formed no more than 100 million years ago, young compared to the age of the solar system • Mountains might sUll be in the process of growing even taller • Age is esUmated based on lack of craters in the area ...
... mountains rising about 11,000 feet • They formed no more than 100 million years ago, young compared to the age of the solar system • Mountains might sUll be in the process of growing even taller • Age is esUmated based on lack of craters in the area ...
Obliquity Variability of a Potentially Habitable Early Venus
... Venus currently rotates slowly, with its spin controlled by solid-body and atmospheric thermal tides. However, conditions may have been far different 4 billion years ago, when the Sun was fainter and most of the carbon within Venus could have been in solid form, implying a low-mass atmosphere. We in ...
... Venus currently rotates slowly, with its spin controlled by solid-body and atmospheric thermal tides. However, conditions may have been far different 4 billion years ago, when the Sun was fainter and most of the carbon within Venus could have been in solid form, implying a low-mass atmosphere. We in ...
Who Built the Moon?
... astronomical principle and it is quite possible that earlier observers, long before written records began, were also aware of it. ...
... astronomical principle and it is quite possible that earlier observers, long before written records began, were also aware of it. ...
Lecture #27: Saturn The Main Point
... • The ratio of outgoing to incoming is about the same as it is for Jupiter. But because Saturn only receives about 25% as much sunlight as Jupiter, the heat source is unlikely to be related to the solar input. • Saturn must have a strong internal heat source: – Saturn too small to generate much heat ...
... • The ratio of outgoing to incoming is about the same as it is for Jupiter. But because Saturn only receives about 25% as much sunlight as Jupiter, the heat source is unlikely to be related to the solar input. • Saturn must have a strong internal heat source: – Saturn too small to generate much heat ...
Origin of Elements in the Solar System
... were generally representative of those in the galaxy, and perhaps beyond when the protosolar nebula formed. Thus, “universal” and “cosmic” are frequently substituted for “solar” as the adjective describing these abundances. If the sun and other stars developed from homogeneous material which had bee ...
... were generally representative of those in the galaxy, and perhaps beyond when the protosolar nebula formed. Thus, “universal” and “cosmic” are frequently substituted for “solar” as the adjective describing these abundances. If the sun and other stars developed from homogeneous material which had bee ...
Parallax
... Parallax can also be used to determine the distance to the Moon. One way to determine the lunar parallax from one location is by using a lunar eclipse. A full shadow of the Earth on the Moon has an apparent radius of curvature equal to the difference between the apparent radii of the Earth and the S ...
... Parallax can also be used to determine the distance to the Moon. One way to determine the lunar parallax from one location is by using a lunar eclipse. A full shadow of the Earth on the Moon has an apparent radius of curvature equal to the difference between the apparent radii of the Earth and the S ...
Catastrophic Granite Formation Rapid Melting of
... Because we don’t observe granites forming today, debate has raged for centuries as to how granites form. While there is now much consensus, some details of the processes involved are still being elucidated. Nevertheless, the conventional wisdom has been adamant until recently that granites take mill ...
... Because we don’t observe granites forming today, debate has raged for centuries as to how granites form. While there is now much consensus, some details of the processes involved are still being elucidated. Nevertheless, the conventional wisdom has been adamant until recently that granites take mill ...
PDF only - at www.arxiv.org.
... Why are the terrestrial planets so different from each other? Venus should be the most Earth-like of all our planetary neighbours. Its size, bulk composition and distance from the Sun are very similar to those of the Earth. Its original atmosphere was probably similar to that of early Earth, with la ...
... Why are the terrestrial planets so different from each other? Venus should be the most Earth-like of all our planetary neighbours. Its size, bulk composition and distance from the Sun are very similar to those of the Earth. Its original atmosphere was probably similar to that of early Earth, with la ...
Lesson Plan D2 Comets and Meteors
... Both comets and asteroids are small solar system bodies. They are both dark in color, irregular in shape, and made of ancient material from the formation of the solar system. They differ in their compositions and orbits. Asteroids are composed mainly of rock and metal, while comets are made of ice a ...
... Both comets and asteroids are small solar system bodies. They are both dark in color, irregular in shape, and made of ancient material from the formation of the solar system. They differ in their compositions and orbits. Asteroids are composed mainly of rock and metal, while comets are made of ice a ...
joelcrespo - UpWardBoundGeneralScience
... telescope in 1610; he noted its odd appearance but was confused by it. This was due to he fact that Earth would sometimes orbit through Saturn's rings. ...
... telescope in 1610; he noted its odd appearance but was confused by it. This was due to he fact that Earth would sometimes orbit through Saturn's rings. ...
04-00080 MESSENGER_7_18.indd - The Johns Hopkins University
... For a world such a relatively small distance from Earth, Mercury remains a big mystery. The planet is hard to study: Its average distance from the Sun is just 58 million kilometers (36 million miles), or about twothirds closer than Earth’s orbit. Mercury is visible from Earth only for several weeks ...
... For a world such a relatively small distance from Earth, Mercury remains a big mystery. The planet is hard to study: Its average distance from the Sun is just 58 million kilometers (36 million miles), or about twothirds closer than Earth’s orbit. Mercury is visible from Earth only for several weeks ...
Pluto
... Pluto is not like the other outer gas planets because it is the only planet after Jupiter that has no gas. It does not have gas because it is so far away from the sun that the nitrogen ...
... Pluto is not like the other outer gas planets because it is the only planet after Jupiter that has no gas. It does not have gas because it is so far away from the sun that the nitrogen ...
Relations between sedimentary basins and petroleum
... explain the differences in velocity between the plates above, in other words their relative motion. Faults are surfaces of fracture and movement of the brittle part of the crust, which behaves in a mainly elastic way. These may be horizontal (i.e. decollements) or inclined up to 90°. The rock above ...
... explain the differences in velocity between the plates above, in other words their relative motion. Faults are surfaces of fracture and movement of the brittle part of the crust, which behaves in a mainly elastic way. These may be horizontal (i.e. decollements) or inclined up to 90°. The rock above ...
The Solar System - Royal Astronomical Society of Canada
... the central sun, gradually became spherical and formed the planets. In recent years, however, this theory has been found ...
... the central sun, gradually became spherical and formed the planets. In recent years, however, this theory has been found ...
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.