Q in the Solar System
... torque is to increase the eccentricity, as well as the semimajor axis, of the sateIlite's orbit. The tangential component of force on the satellite, which is responsible for the tidal torque, is not the only component which affects the eccentricity. The radial component also plays a role in this pro ...
... torque is to increase the eccentricity, as well as the semimajor axis, of the sateIlite's orbit. The tangential component of force on the satellite, which is responsible for the tidal torque, is not the only component which affects the eccentricity. The radial component also plays a role in this pro ...
student instruction and answer sheet
... the history of our galaxy. A reasonable estimate for this number is 400 billion stars. (2) The star must release enough energy to have a sizeable habitable zone. A habitable zone is the region around a star where liquid water could exist on an orbiting planet. 90% of the stars in our galaxy are too ...
... the history of our galaxy. A reasonable estimate for this number is 400 billion stars. (2) The star must release enough energy to have a sizeable habitable zone. A habitable zone is the region around a star where liquid water could exist on an orbiting planet. 90% of the stars in our galaxy are too ...
Mankind`s Purple Dawn
... age when Saturn hovered as a dull orb in the chaotic swirls of the northern skies. Outside stars could not have been seen because Saturn’s opaque plasma sheath and its anode glow would have blocked out all incoming light ― much in the same way that the glow from city lights bouncing off the atmosphe ...
... age when Saturn hovered as a dull orb in the chaotic swirls of the northern skies. Outside stars could not have been seen because Saturn’s opaque plasma sheath and its anode glow would have blocked out all incoming light ― much in the same way that the glow from city lights bouncing off the atmosphe ...
PHYS178 Planets
... reflectivity of the ring particles may be due to radiationdarkened methane ice. ...
... reflectivity of the ring particles may be due to radiationdarkened methane ice. ...
On disc driven inward migration of resonantly coupled planets with
... Here we shall assume the prior evolution of the system leads to the orbital separation of the planets being slightly larger than that required for a strict 2:1 commensurability without considering the history in detail as it is beyond the scope of this paper. However, we comment that this might have ...
... Here we shall assume the prior evolution of the system leads to the orbital separation of the planets being slightly larger than that required for a strict 2:1 commensurability without considering the history in detail as it is beyond the scope of this paper. However, we comment that this might have ...
A Modern View of the Universe
... Our solar system belongs to the huge, disk-shaped collection of stars called the Milky Way Galaxy. A galaxy is a great island of stars in space, containing from a few hundred million to a trillion or more stars. The Milky Way is a relatively large galaxy, containing more than 100 billion stars. Our ...
... Our solar system belongs to the huge, disk-shaped collection of stars called the Milky Way Galaxy. A galaxy is a great island of stars in space, containing from a few hundred million to a trillion or more stars. The Milky Way is a relatively large galaxy, containing more than 100 billion stars. Our ...
Voyage: A Journey through our Solar System Grades 5
... Uranus’s unique feature is that it appears to have been knocked over sometime in the past. Most planets orbit around the Sun spinning upright; that is, their rotational axes are almost perpendicular with respect to their orbit (with small deviations, like the Earth’s 23.5º tilt). Uranus’s rotation a ...
... Uranus’s unique feature is that it appears to have been knocked over sometime in the past. Most planets orbit around the Sun spinning upright; that is, their rotational axes are almost perpendicular with respect to their orbit (with small deviations, like the Earth’s 23.5º tilt). Uranus’s rotation a ...
UNIT LESSON PLAN
... Contains the Great Dark Spot, a feature similar to Jupiters, that shows storm like characteristics in it’s atmosphere If Neptune were hollow it could contain nearly 60 Earths Neptune orbits the Sun every 165 years It has 8 satellites, Triton being it’s largest Slide 6: IS PLUTO A PLANET? Pluto ...
... Contains the Great Dark Spot, a feature similar to Jupiters, that shows storm like characteristics in it’s atmosphere If Neptune were hollow it could contain nearly 60 Earths Neptune orbits the Sun every 165 years It has 8 satellites, Triton being it’s largest Slide 6: IS PLUTO A PLANET? Pluto ...
Chapter 6 - Soran University
... There are other smaller object that orbit the Sun, including asteroids, comets, meteoroids and dwarf planets. •Asteroids (also called minor planets) are rocky or metallic objects, most of which orbit the Sun in the asteroid belt between Mars and Jupiter. •Comets are small, icy bodies that orbit the ...
... There are other smaller object that orbit the Sun, including asteroids, comets, meteoroids and dwarf planets. •Asteroids (also called minor planets) are rocky or metallic objects, most of which orbit the Sun in the asteroid belt between Mars and Jupiter. •Comets are small, icy bodies that orbit the ...
The Detection and Characterization of Extrasolar Planets
... Abstract: We have now confirmed the existence of > 1800 planets orbiting stars other than the Sun; known as extrasolar planets or exoplanets. The different methods for detecting such planets are sensitive to different regions of parameter space, and so, we are discovering a wide diversity of exoplan ...
... Abstract: We have now confirmed the existence of > 1800 planets orbiting stars other than the Sun; known as extrasolar planets or exoplanets. The different methods for detecting such planets are sensitive to different regions of parameter space, and so, we are discovering a wide diversity of exoplan ...
A Planetary Overview
... now a dwarf planet, along with the asteroid Ceres and Eris, an object a bit larger than Pluto in the Kuiper belt. The IAU will establish a process to assign borderline objects into either dwarf planet or other categories. The third category above includes most of the asteroids, most of the objects b ...
... now a dwarf planet, along with the asteroid Ceres and Eris, an object a bit larger than Pluto in the Kuiper belt. The IAU will establish a process to assign borderline objects into either dwarf planet or other categories. The third category above includes most of the asteroids, most of the objects b ...
The Lick-Carnegie Exoplanet Survey: A 3.1 M⊕ Planet in the
... yielding a typical S/N ratio per pixel of 140. Doppler shifts are measured by placing an Iodine absorption cell just ahead of the spectrometer slit in the converging f/15 beam from the telescope. This gaseous absorption cell superimposes a rich forest of Iodine lines on the stellar spectrum, providi ...
... yielding a typical S/N ratio per pixel of 140. Doppler shifts are measured by placing an Iodine absorption cell just ahead of the spectrometer slit in the converging f/15 beam from the telescope. This gaseous absorption cell superimposes a rich forest of Iodine lines on the stellar spectrum, providi ...
The Lick-Carnegie Exoplanet Survey: A 3.1 M_Earth Planet in the
... There are now nearly 500 known extrasolar planets, and discovery work continues apace on many fronts: by radial velocities (RV), gravitational microlensing, transit surveys, coronography, nulling interferometry, and astrometry. By far the most productive discovery technique to date has been through ...
... There are now nearly 500 known extrasolar planets, and discovery work continues apace on many fronts: by radial velocities (RV), gravitational microlensing, transit surveys, coronography, nulling interferometry, and astrometry. By far the most productive discovery technique to date has been through ...
The formation and habitability of terrestrial planets in the presence of
... that an already-formed terrestrial planet could survive on a similar orbit (Mandell and Sigurdsson, 2003). The character and composition of a system of terrestrial planets is strongly affected by the total amount of solid material in the protoplanetary disk (Wetherill, 1996; Chambers and Cassen, 200 ...
... that an already-formed terrestrial planet could survive on a similar orbit (Mandell and Sigurdsson, 2003). The character and composition of a system of terrestrial planets is strongly affected by the total amount of solid material in the protoplanetary disk (Wetherill, 1996; Chambers and Cassen, 200 ...
Exoanatomy - Jothi's World
... individual is different, and because of these differences, has slight advantages over other members of its species in some ways, and is disadvantaged in other ways. Variability leads to mutations which are variably adapted to their environment. This variability is caused by random variations in the ...
... individual is different, and because of these differences, has slight advantages over other members of its species in some ways, and is disadvantaged in other ways. Variability leads to mutations which are variably adapted to their environment. This variability is caused by random variations in the ...
Full Paper - PDF - Armagh Observatory
... the most of his opportunity to speak out: “The Lowell result confirms the possible high eccentricity announced by us on April 5. Among the possibilities are a large asteroid greatly disturbed in its orbit by close approach to a major planet such as Jupiter, or it may be one of many long-period plane ...
... the most of his opportunity to speak out: “The Lowell result confirms the possible high eccentricity announced by us on April 5. Among the possibilities are a large asteroid greatly disturbed in its orbit by close approach to a major planet such as Jupiter, or it may be one of many long-period plane ...
Terrestrial Planets
... will slightly bend the light rays from the source star, causing the two stars to appear farther apart than they normally would. This effect was used by Sir Arthur Eddington in 1919 to provide the first empirical evidence for General Relativity. In reality, even the most powerful Earth-bound telescop ...
... will slightly bend the light rays from the source star, causing the two stars to appear farther apart than they normally would. This effect was used by Sir Arthur Eddington in 1919 to provide the first empirical evidence for General Relativity. In reality, even the most powerful Earth-bound telescop ...
J. Blum: Planet formation
... Fig. 1. Declining crater densities versus time, after Wilhelms (1987). N is the cumulative number of craters >20 km diameter per sq. km. The thin gray bar is the period of the well-defined late heavy bombardment, between the formation of Nectaris and Imbrium, when a dozen lunar basins were formed. T ...
... Fig. 1. Declining crater densities versus time, after Wilhelms (1987). N is the cumulative number of craters >20 km diameter per sq. km. The thin gray bar is the period of the well-defined late heavy bombardment, between the formation of Nectaris and Imbrium, when a dozen lunar basins were formed. T ...
Moons, Pluto, and Rings
... Titan: Moon with Atmosphere (2) Titan’s atmosphere has a pressure 1.6 times Earth's is comprised of mostly nitrogen, plus 6% argon and a few percent methane has trace amounts of organic compounds (such as carbon monoxide, ethane, and hydrogen cyanide) and water has multiple layers of clouds the bot ...
... Titan: Moon with Atmosphere (2) Titan’s atmosphere has a pressure 1.6 times Earth's is comprised of mostly nitrogen, plus 6% argon and a few percent methane has trace amounts of organic compounds (such as carbon monoxide, ethane, and hydrogen cyanide) and water has multiple layers of clouds the bot ...
SECTION28.1 Formation of the Solar System
... gravity, an attractive force between two objects. He determined that both the masses of and the distance between two bodies determined the force between them. ...
... gravity, an attractive force between two objects. He determined that both the masses of and the distance between two bodies determined the force between them. ...
The outer planets: Uranus, Neptune and Pluto
... discovered by Voyager. The two moons visible from Earth, Triton and Nereid, both have peculiar orbits. Nereid has a highly eccentric orbit, and Triton is unique among large planetary satellites because it orbits backwards – opposite to the sense of the planet’s rotation. The six moons discovered by ...
... discovered by Voyager. The two moons visible from Earth, Triton and Nereid, both have peculiar orbits. Nereid has a highly eccentric orbit, and Triton is unique among large planetary satellites because it orbits backwards – opposite to the sense of the planet’s rotation. The six moons discovered by ...
File
... David Jewitt of the University of Hawaii and Jane Luu, now at MIT’s Lincoln Lab, have been the discoverers of most of the known Kuiper-belt objects. ...
... David Jewitt of the University of Hawaii and Jane Luu, now at MIT’s Lincoln Lab, have been the discoverers of most of the known Kuiper-belt objects. ...
The Search for Extrasolar Earth-like Planets
... The search for extrasolar Earth-like planets is underway. Over 100 extrasolar giant planets are known to orbit nearby sun-like stars, including several in multiple-planet systems. These planetary systems are stepping stones for the search for Earth-like planets; the technology development, observati ...
... The search for extrasolar Earth-like planets is underway. Over 100 extrasolar giant planets are known to orbit nearby sun-like stars, including several in multiple-planet systems. These planetary systems are stepping stones for the search for Earth-like planets; the technology development, observati ...
Dwarf planet
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. That is, it is in direct orbit of the Sun, and is massive enough for its shape to be in hydrostatic equilibrium under its own gravity, but has not cleared the neighborhood around its orbit.The term dwarf planet was adopted in 2006 as part of a three-way categorization of bodies orbiting the Sun, brought about by an increase in discoveries of objects farther away from the Sun than Neptune that rivaled Pluto in size, and finally precipitated by the discovery of an even more massive object, Eris. The exclusion of dwarf planets from the roster of planets by the IAU has been both praised and criticized; it was said to be the ""right decision"" by astronomer Mike Brown, who discovered Eris and other new dwarf planets, but has been rejected by Alan Stern, who had coined the term dwarf planet in 1990.The International Astronomical Union (IAU) currently recognizes five dwarf planets: Ceres, Pluto, Haumea, Makemake, and Eris. Brown criticizes this official recognition: ""A reasonable person might think that this means that there are five known objects in the solar system which fit the IAU definition of dwarf planet, but this reasonable person would be nowhere close to correct.""It is suspected that another hundred or so known objects in the Solar System are dwarf planets. Estimates are that up to 200 dwarf planets may be found when the entire region known as the Kuiper belt is explored, and that the number may exceed 10,000 when objects scattered outside the Kuiper belt are considered. Individual astronomers recognize several of these, and in August 2011 Mike Brown published a list of 390 candidate objects, ranging from ""nearly certain"" to ""possible"" dwarf planets. Brown currently identifies eleven known objects – the five accepted by the IAU plus 2007 OR10, Quaoar, Sedna, Orcus, 2002 MS4 and Salacia – as ""virtually certain"", with another dozen highly likely. Stern states that there are more than a dozen known dwarf planets.However, only two of these bodies, Ceres and Pluto, have been observed in enough detail to demonstrate that they actually fit the IAU's definition. The IAU accepted Eris as a dwarf planet because it is more massive than Pluto. They subsequently decided that unnamed trans-Neptunian objects with an absolute magnitude brighter than +1 (and hence a diameter of ≥838 km assuming a geometric albedo of ≤1) are to be named under the assumption that they are dwarf planets. The only two such objects known at the time, Makemake and Haumea, went through this naming procedure and were declared to be dwarf planets. The question of whether other likely objects are dwarf planets has never been addressed by the IAU. The classification of bodies in other planetary systems with the characteristics of dwarf planets has not been addressed.