A SURVEY FOR ``NORMAL`` IRREGULAR SATELLITES AROUND
... where ap and mp are the orbital semimajor axis and mass of the planet, respectively, and M$ is the mass of the Sun. Table 2 shows the Hill radii for the outer planets. The area of the Hill sphere searched for satellites is shown in Figure 2. Seven fields were imaged three times each on one night and ...
... where ap and mp are the orbital semimajor axis and mass of the planet, respectively, and M$ is the mass of the Sun. Table 2 shows the Hill radii for the outer planets. The area of the Hill sphere searched for satellites is shown in Figure 2. Seven fields were imaged three times each on one night and ...
an ultradeep survey for irregular satellites of uranus
... The data were analyzed to find solar system bodies in two complementary ways. First, a computer algorithm was used to detect objects that appeared in all three images from one night and which had a motion consistent with being beyond the orbit of Jupiter (speeds less than 2000 hr1). Second, all of ...
... The data were analyzed to find solar system bodies in two complementary ways. First, a computer algorithm was used to detect objects that appeared in all three images from one night and which had a motion consistent with being beyond the orbit of Jupiter (speeds less than 2000 hr1). Second, all of ...
The dynamics of Jupiter and Saturn in the gaseous protoplanetary disk
... outward, despite the disk has a global motion towards the Sun). Nevertheless, the torque unbalance that Masset and Snellgrove (2001) measured depends critically on the mass of the disk inside the orbit of Jupiter, and the latter depends on the global evolution of the disk. In particular, it is known ...
... outward, despite the disk has a global motion towards the Sun). Nevertheless, the torque unbalance that Masset and Snellgrove (2001) measured depends critically on the mass of the disk inside the orbit of Jupiter, and the latter depends on the global evolution of the disk. In particular, it is known ...
CAPTURE OF IRREGULAR SATELLITES DURING PLANETARY
... fraction of these planetesimals evolved into the inner solar system, producing the LHB. To study (2), we use the LHB variant of the Nice model taken from Gomes et al. (2005). In times after the LHB, the planetary orbits become gradually less eccentric due to the effects of dynamical friction from th ...
... fraction of these planetesimals evolved into the inner solar system, producing the LHB. To study (2), we use the LHB variant of the Nice model taken from Gomes et al. (2005). In times after the LHB, the planetary orbits become gradually less eccentric due to the effects of dynamical friction from th ...
Ultra Deep Survey for Irregular Satellites of Uranus: Limits to
... 15µm pixels give a scale of 0.′′ 20 pixel−1 at prime focus and a field-of-view that is about 34′ × 27′ with the North-South direction aligned with the long axis. Gaps between the chips are about 16′′ in the North-South direction and only 3′′ in the East-West direction. Images were obtained with a Kr ...
... 15µm pixels give a scale of 0.′′ 20 pixel−1 at prime focus and a field-of-view that is about 34′ × 27′ with the North-South direction aligned with the long axis. Gaps between the chips are about 16′′ in the North-South direction and only 3′′ in the East-West direction. Images were obtained with a Kr ...
A Survey for “Normal” Irregular Satellites Around Neptune: Limits to
... where ap and mp are the orbital semi-major axis and mass of the planet and M is the mass of the sun. Table 2 shows the Hill radii for the outer planets. The area of the Hill sphere searched for satellites is shown in Figure 2. Seven fields were imaged 3 times each on one night and 2 times each on t ...
... where ap and mp are the orbital semi-major axis and mass of the planet and M is the mass of the sun. Table 2 shows the Hill radii for the outer planets. The area of the Hill sphere searched for satellites is shown in Figure 2. Seven fields were imaged 3 times each on one night and 2 times each on t ...
New Horizons Mission Design for the Pluto-Kuiper Belt
... Through a close flyby of Pluto and its moon Charon, the PKB mission will carry out the first scientific reconnaissance of the Pluto-Charon binary system. It will also explore the Kuiper Belt for the first time, in an extended mission following the PlutoCharon encounter, by visiting one or more Kuipe ...
... Through a close flyby of Pluto and its moon Charon, the PKB mission will carry out the first scientific reconnaissance of the Pluto-Charon binary system. It will also explore the Kuiper Belt for the first time, in an extended mission following the PlutoCharon encounter, by visiting one or more Kuipe ...
Jupiter`s Galilean Moons
... http://en.wikipedia.org/wiki/Image:Outersolarsystem_objectpositions_labels_comp.png#filelinks ...
... http://en.wikipedia.org/wiki/Image:Outersolarsystem_objectpositions_labels_comp.png#filelinks ...
solar system
... Dialogue Concerning the Two Chief World Systems of 1632 was a watershed in what had shaped ...
... Dialogue Concerning the Two Chief World Systems of 1632 was a watershed in what had shaped ...
Irregular Satellites of the Giant Planets
... at i = 168° is joined by S/2004 S7, S10, S12, S13, S14, S16, and S17. Skathi at i = 153° has acquired four comrades (Narvi = S/2003 S1, S/2004 S9, S15 and S18). These retrograde saturnian inclination groups encompass a wide range of semimajor axes and eccentricities, raising considerable doubt as to ...
... at i = 168° is joined by S/2004 S7, S10, S12, S13, S14, S16, and S17. Skathi at i = 153° has acquired four comrades (Narvi = S/2003 S1, S/2004 S9, S15 and S18). These retrograde saturnian inclination groups encompass a wide range of semimajor axes and eccentricities, raising considerable doubt as to ...
Effects of Planetary Migration on Natural Satellites of the Outer Planets
... and their orbits are characterized by large eccentricities and/or inclinations. In most cases the orbits are retrograde. In principle, their dynamical properties are not very compatible with formation from the primordial disk, unless latter evolutionary mechanisms can account for their present orbit ...
... and their orbits are characterized by large eccentricities and/or inclinations. In most cases the orbits are retrograde. In principle, their dynamical properties are not very compatible with formation from the primordial disk, unless latter evolutionary mechanisms can account for their present orbit ...
Lecture 24: Saturn The Solar System Saturn`s Rings
... •The Encke gap is in a 5:3 resonance with Mimas ...
... •The Encke gap is in a 5:3 resonance with Mimas ...
Uranus Neptune Pluto
... when a larger world such as Ganymede has none? a. Impacts vaporize ices on these cold bodies. b. Tidal heating releases gases on these cold bodies. c. In cold environments, gas molecules have more mass. d. Gas molecules move more slowly at low temperatures. e. More frozen gases exist in the colder o ...
... when a larger world such as Ganymede has none? a. Impacts vaporize ices on these cold bodies. b. Tidal heating releases gases on these cold bodies. c. In cold environments, gas molecules have more mass. d. Gas molecules move more slowly at low temperatures. e. More frozen gases exist in the colder o ...
Lecture #29
... … assembled from combining NASA Hubble Space Telescope images taken over a 15-hour period. The animation has four sections: ...
... … assembled from combining NASA Hubble Space Telescope images taken over a 15-hour period. The animation has four sections: ...
Evidence from the asteroid belt for a violent past evolution of
... eccentricity associated with the g5 secular frequency. Other possible mechanisms, such as the crossing of multiple mean-motion resonances between Jupiter and Saturn, only excite M5,6 . Resonance crossings between Saturn and Uranus (which also kick Jupiter’s orbit) are not strong enough to pump M5,5 ...
... eccentricity associated with the g5 secular frequency. Other possible mechanisms, such as the crossing of multiple mean-motion resonances between Jupiter and Saturn, only excite M5,6 . Resonance crossings between Saturn and Uranus (which also kick Jupiter’s orbit) are not strong enough to pump M5,5 ...
The outer solar system:
... It is likely that Triton formed in the Kuiper belt and was captured when it ventured too close to Neptune. One suggestion is that Neptune originally had its own more normal family of moons. Triton collided with a small icy moon, with a mass a few percent of Triton’s. The collision completely destro ...
... It is likely that Triton formed in the Kuiper belt and was captured when it ventured too close to Neptune. One suggestion is that Neptune originally had its own more normal family of moons. Triton collided with a small icy moon, with a mass a few percent of Triton’s. The collision completely destro ...
Information extracted from Britannica 97
... The low mean density of Saturn is direct evidence of the preponderance of hydrogen in its bulk composition. Under Saturnian conditions, hydrogen behaves as a liquid rather than a gas at pressures exceeding about one kilobar (corresponding to a depth of 1,000 kilometres below the clouds). At this dep ...
... The low mean density of Saturn is direct evidence of the preponderance of hydrogen in its bulk composition. Under Saturnian conditions, hydrogen behaves as a liquid rather than a gas at pressures exceeding about one kilobar (corresponding to a depth of 1,000 kilometres below the clouds). At this dep ...
Symplectic map description of Halley’s comet dynamics
... the Sun’s trajectory. As Mercury semi axis is less than perihelion’s comet, Mercury, like the Sun, acts as a second rotating dipole, consequently the two potential terms in (4) contribute equally. The orbital frequency of the planets being only near integer ratio, for a sufficiently long time random ...
... the Sun’s trajectory. As Mercury semi axis is less than perihelion’s comet, Mercury, like the Sun, acts as a second rotating dipole, consequently the two potential terms in (4) contribute equally. The orbital frequency of the planets being only near integer ratio, for a sufficiently long time random ...
Neptune: The Last Gas Giant
... Another spot was discovered in the northern hemisphere. This means Neptune's atmosphere changes often There is also an odd white cloud that zips around the planet every hours or so ...
... Another spot was discovered in the northern hemisphere. This means Neptune's atmosphere changes often There is also an odd white cloud that zips around the planet every hours or so ...
Origin and Evolution of Trojan Asteroids
... over the age of the solar system, in the case of tadpole orbits for the Earth, Venus, and Mars, we can only perform numerical surveys limited in time, since to maintain the accuracy in the integration of the equation of motion a short timestep has to be used. The present studies on the dynamics of t ...
... over the age of the solar system, in the case of tadpole orbits for the Earth, Venus, and Mars, we can only perform numerical surveys limited in time, since to maintain the accuracy in the integration of the equation of motion a short timestep has to be used. The present studies on the dynamics of t ...
In Roman mythology Neptune was the god of the Sea. He is known
... and a small irregular white cloud that zipped around Neptune every 16 hours or so now. This feature is known as "The Scooter." Recently, however, the Hubble Space Telescope (HST) showed that the Great Dark Spot has disappeared! Scientists think that it has either dissipated (like our storms do) or i ...
... and a small irregular white cloud that zipped around Neptune every 16 hours or so now. This feature is known as "The Scooter." Recently, however, the Hubble Space Telescope (HST) showed that the Great Dark Spot has disappeared! Scientists think that it has either dissipated (like our storms do) or i ...
Jovian Planets
... • Have substantial amounts of ice. • Formed in orbit around jovian planets. • Circular, equatorial orbits in same direction as planet rotation ...
... • Have substantial amounts of ice. • Formed in orbit around jovian planets. • Circular, equatorial orbits in same direction as planet rotation ...
Uranus
... The irregular moons, which orbit at a considerably farther distance than the inner and larger moons, have highly eccentric and retrograde orbits. These moons are thought to be captured asteroids. The first two moons to be discovered, Titania and Oberon, were spotted by Sir William Herschel on Januar ...
... The irregular moons, which orbit at a considerably farther distance than the inner and larger moons, have highly eccentric and retrograde orbits. These moons are thought to be captured asteroids. The first two moons to be discovered, Titania and Oberon, were spotted by Sir William Herschel on Januar ...
PDF format
... • Io is the most volcanically active body in the solar system, but why? © 2014 Pearson Education, Inc. ...
... • Io is the most volcanically active body in the solar system, but why? © 2014 Pearson Education, Inc. ...
Exploration of Io
The exploration of Io, Jupiter's third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations and visits by spacecraft to the Jupiter system. Italian astronomer Galileo Galilei was the first to record an observation of Io on January 8, 1610, though Simon Marius may have also observed Io at around the same time. During the 17th century, observations of Io and the other Galilean satellites helped with the measurement of longitude by map makers and surveyors, with validation of Kepler's Third Law of planetary motion, and with measurement of the speed of light. Based on ephemerides produced by astronomer Giovanni Cassini and others, Pierre-Simon Laplace created a mathematical theory to explain the resonant orbits of three of Jupiter's moons, Io, Europa, and Ganymede. This resonance was later found to have a profound effect on the geologies of these moons. Improved telescope technology in the late 19th and 20th centuries allowed astronomers to resolve large-scale surface features on Io as well as to estimate its diameter and mass.The advent of unmanned spaceflight in the 1950s and 1960s provided an opportunity to observe Io up-close. In the 1960s the moon's effect on Jupiter's magnetic field was discovered. The flybys of the two Pioneer probes, Pioneer 10 and 11 in 1973 and 1974, provided the first accurate measurement of Io's mass and size. Data from the Pioneers also revealed an intense belt of radiation near Io and suggested the presence of an atmosphere. In 1979, the two Voyager spacecraft flew through the Jupiter system. Voyager 1, during its encounter in March 1979, observed active volcanism on Io for the first time and mapped its surface in great detail, particularly the side that faces Jupiter. The Voyagers observed the Io plasma torus and Io's sulfur dioxide (SO2) atmosphere for the first time. NASA launched the Galileo spacecraft in 1989, which entered Jupiter's orbit in December 1995. Galileo allowed detailed study of both the planet and its satellites, including six flybys of Io between late 1999 and early 2002 that provided high-resolution images and spectra of Io's surface, confirming the presence of high-temperature silicate volcanism on Io. Distant observations by Galileo allowed planetary scientists to study changes on the surface that resulted from the moon's active volcanism.Following Galileo and a distant encounter by the Pluto-bound New Horizons spacecraft in 2007, NASA and the European Space Agency (ESA) made plans to return to the Jupiter system and Io. In 2009, NASA approved a plan to send an orbiter to Europa called the Jupiter Europa Orbiter as part of a joint program with ESA called the Europa/Jupiter System Mission. The ESA component of the project was the Jupiter Ganymede Orbiter. However, the EJSM mission collaboration was cancelled. ESA is continuing with its initiative under the name Jupiter Icy Moon Explorer (JUICE) to explore Ganymede, Europa, and Callisto, without plans to investigate Io at all. The proposed NASA Discovery mission Io Volcano Observer, currently going through a competitive process to be selected, would explore Io as its primary mission. In the meantime, Io continues to be observed by the Hubble Space Telescope as well as by Earth-based astronomers using improved telescopes such as Keck and the European Southern Observatory, that use new technologies such as adaptive optics.