A radiogenic heating evolution model for cosmochemically Earth
... and thus, one is forced to make assumptions based on our Solar System with the understanding that it may not be representative of the hundreds of billions of others in the Galaxy. Furthermore, most exoplanet models inaccurately assume a heat production rate at steady-state rather than one that decli ...
... and thus, one is forced to make assumptions based on our Solar System with the understanding that it may not be representative of the hundreds of billions of others in the Galaxy. Furthermore, most exoplanet models inaccurately assume a heat production rate at steady-state rather than one that decli ...
The Long-Term Dynamical Evolution of Planetary Systems
... the last Protostars and Planets meeting in understanding the dynamics that can reshape planetary systems. Observational progress has been yet more dramatic. Radial velocity surveys and the Kepler mission have provided extensive catalogues of single and multiple planet systems, that can be used to co ...
... the last Protostars and Planets meeting in understanding the dynamics that can reshape planetary systems. Observational progress has been yet more dramatic. Radial velocity surveys and the Kepler mission have provided extensive catalogues of single and multiple planet systems, that can be used to co ...
Outer irregular satellites of the planets and their relationship with
... and references therein). Mars’ two small satellites Phobos and Deimos resemble regular collisional shards, but some have suggested that they may be captured bodies similar to the irregular satellites of the giant planets (Burns 1992). No outer irregular satellites of Mars are known to exist (Sheppar ...
... and references therein). Mars’ two small satellites Phobos and Deimos resemble regular collisional shards, but some have suggested that they may be captured bodies similar to the irregular satellites of the giant planets (Burns 1992). No outer irregular satellites of Mars are known to exist (Sheppar ...
Detectability of extrasolar moons as gravitational microlenses
... shifts of the transit ingress and egress (cf. also Holman & Murray 2005). In their simulations of space-based gravitational microlensing Bennett & Rhie (2002) mention the possibility of discovering extrasolar moons similar to our own Moon. Later that year, Han & Han (2002) performed a detailed feasi ...
... shifts of the transit ingress and egress (cf. also Holman & Murray 2005). In their simulations of space-based gravitational microlensing Bennett & Rhie (2002) mention the possibility of discovering extrasolar moons similar to our own Moon. Later that year, Han & Han (2002) performed a detailed feasi ...
Outer irregular satellites of the planets and their
... and references therein). Mars’ two small satellites Phobos and Deimos resemble regular collisional shards, but some have suggested that they may be captured bodies similar to the irregular satellites of the giant planets (Burns 1992). No outer irregular satellites of Mars are known to exist (Sheppar ...
... and references therein). Mars’ two small satellites Phobos and Deimos resemble regular collisional shards, but some have suggested that they may be captured bodies similar to the irregular satellites of the giant planets (Burns 1992). No outer irregular satellites of Mars are known to exist (Sheppar ...
Venus Alex Jones
... Discovery Who- Nobody actually discovered venus, because it was so visible to the eye. ...
... Discovery Who- Nobody actually discovered venus, because it was so visible to the eye. ...
Star Classification and its Connection to Exoplanets.
... Exoplanets, or extrasolar planets, are planets found outside the solar system. Technically, the search for exoplanets began about 21 years ago, when astronomers were observing HD 114762, they noticed a slight wobble. This slight wobble resulted from a gravitational pull from some other celestial bod ...
... Exoplanets, or extrasolar planets, are planets found outside the solar system. Technically, the search for exoplanets began about 21 years ago, when astronomers were observing HD 114762, they noticed a slight wobble. This slight wobble resulted from a gravitational pull from some other celestial bod ...
No. 54 - Institute for Astronomy
... up its equipment inside the old Northern Light Observatory and observe the event through specially designed doors that replaced the old windows, and to use an airport hangar located 10 miles away. Identical sets of imaging instruments were set up at both locations, with six digital SLR cameras fitte ...
... up its equipment inside the old Northern Light Observatory and observe the event through specially designed doors that replaced the old windows, and to use an airport hangar located 10 miles away. Identical sets of imaging instruments were set up at both locations, with six digital SLR cameras fitte ...
Evidence from the asteroid belt for a violent past evolution of
... eq. (2), that we called the ’jumping-Jupiter’ scenario. Here a Neptune-mass planet is first scattered inwards by Saturn and then outwards by Jupiter, so that the two major planets recoil in opposite directions. However, we were unable to firmly conclude that the real evolution of the giant planets h ...
... eq. (2), that we called the ’jumping-Jupiter’ scenario. Here a Neptune-mass planet is first scattered inwards by Saturn and then outwards by Jupiter, so that the two major planets recoil in opposite directions. However, we were unable to firmly conclude that the real evolution of the giant planets h ...
Other Planetary Systems
... some earlier astronomers had guessed, Huygens successfully estimated stellar distances. The late Carl Sagan eloquently described the technique: Huygens drilled small holes in a brass plate, held the plate up to the Sun and asked himself which hole seemed as bright as he remembered the bright star Si ...
... some earlier astronomers had guessed, Huygens successfully estimated stellar distances. The late Carl Sagan eloquently described the technique: Huygens drilled small holes in a brass plate, held the plate up to the Sun and asked himself which hole seemed as bright as he remembered the bright star Si ...
On the chaotic orbit of comet 29P/Schwassmann
... In the integration, we ignore the potential non-gravitational effects. Suspecting the chaotic evolution of the comet’s orbit, these effects only increase the measure of chaos, if they are efficient. Comet 29P is, however, a relatively large object with the radius of 20 km (Horner et al., 2003) and, ...
... In the integration, we ignore the potential non-gravitational effects. Suspecting the chaotic evolution of the comet’s orbit, these effects only increase the measure of chaos, if they are efficient. Comet 29P is, however, a relatively large object with the radius of 20 km (Horner et al., 2003) and, ...
threat definition and verification
... This crop circle has another unusual feature; an off-center cleared circle containing the inner planets’ orbits. Assuming this circle defines the centroid of the Sun-Vulcan complex, then it is in the direction of Vulcan as of either the date the T367 crop circle was formed or the date represented by ...
... This crop circle has another unusual feature; an off-center cleared circle containing the inner planets’ orbits. Assuming this circle defines the centroid of the Sun-Vulcan complex, then it is in the direction of Vulcan as of either the date the T367 crop circle was formed or the date represented by ...
Full PDF - Royal Society Publishing
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
Possible climates on terrestrial exoplanets
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
... discoveries have also profoundly changed our vision of the formation, structure and composition of low-mass planets: while it has been long thought, mostly based on the observations of our own Solar System, that there should be a gap between telluric planets with a thin, if any, secondary atmosphere ...
Extrasolar planets - Astronomisk Ungdom
... As mentioned above a macula can disappear and reappear. However, planets do not vanish from their orbit without a trace or a caveat, except if it is a free planet passing the star, but those are rare and not yet accurately proven. All work around extra solar planets is fairly new and current. At pre ...
... As mentioned above a macula can disappear and reappear. However, planets do not vanish from their orbit without a trace or a caveat, except if it is a free planet passing the star, but those are rare and not yet accurately proven. All work around extra solar planets is fairly new and current. At pre ...
Water ice lines and the formation of giant moons around super
... Most of the exoplanets with known masses at Earth-like distances to Sun-like stars are heavier than Jupiter, which raises the question of whether such planets are accompanied by detectable, possibly habitable moons. Here we simulate the accretion disks around super-Jovian planets and find that giant ...
... Most of the exoplanets with known masses at Earth-like distances to Sun-like stars are heavier than Jupiter, which raises the question of whether such planets are accompanied by detectable, possibly habitable moons. Here we simulate the accretion disks around super-Jovian planets and find that giant ...
Brahe, Kepler
... -He made the best measurements that had yet been made in the search for stellar parallax. -He found no parallax for the stars. -He concluded : 1) either the earth was motionless at the center of the Universe 2) the stars were so far away that their parallax was too small to measure. Brahe could not ...
... -He made the best measurements that had yet been made in the search for stellar parallax. -He found no parallax for the stars. -He concluded : 1) either the earth was motionless at the center of the Universe 2) the stars were so far away that their parallax was too small to measure. Brahe could not ...
Geometry of orbits - Harpursville Middle School
... Any object that orbits another object in space is known as a satellite Planets ...
... Any object that orbits another object in space is known as a satellite Planets ...
Astronomy Timeline
... asteroid, Ceres 1842 - Austrian mathematician and physicist Christian Doppler publishes his work on the Doppler Effect 1843 - German astronomer Samuel Heinrich Schwabe describes the sunspot cycle 1846 - German astronomer Johann Galle discovers Neptune 1847 – American astronomer Maria Mitchell become ...
... asteroid, Ceres 1842 - Austrian mathematician and physicist Christian Doppler publishes his work on the Doppler Effect 1843 - German astronomer Samuel Heinrich Schwabe describes the sunspot cycle 1846 - German astronomer Johann Galle discovers Neptune 1847 – American astronomer Maria Mitchell become ...
ES 104 Midterm Exam Study Guide 1
... Know how the craters and the maria on Earth’s moon were formed. Jovian planets versus the Terrestrial planets – be familiar with the physical and compositional differences between these 2 categories of planets – look over the table that you completed for the first homework activity. Also know why th ...
... Know how the craters and the maria on Earth’s moon were formed. Jovian planets versus the Terrestrial planets – be familiar with the physical and compositional differences between these 2 categories of planets – look over the table that you completed for the first homework activity. Also know why th ...
The Story of Planet Building
... ___/6 pts. Significant steps have an illustration (each page must have a picture) ____/15 Use the following terms correctly throughout your book. Underline each term in your description. *If necessary for understanding give a simple definition. 4.6 billion years Accretion Protoplanet Spin ...
... ___/6 pts. Significant steps have an illustration (each page must have a picture) ____/15 Use the following terms correctly throughout your book. Underline each term in your description. *If necessary for understanding give a simple definition. 4.6 billion years Accretion Protoplanet Spin ...
Mean-Motion Resonances as a Source for Infalling Comets toward
... be responsible for the phenomenon in various ways. A simple approach was developed a few years ago (Beust et al. 1991), investigating the direct effect of close encounters of particles on circular orbits around the star with a single massive planet. It was shown that, unless the eccentricity of the ...
... be responsible for the phenomenon in various ways. A simple approach was developed a few years ago (Beust et al. 1991), investigating the direct effect of close encounters of particles on circular orbits around the star with a single massive planet. It was shown that, unless the eccentricity of the ...
Formation, Habitability, and Detection of Extrasolar Moons
... viscous ice, and diving 100 km or more to the ocean floor, where the search would begin for a hypothetical volcanic vent. If the ice is thin enough to be permeable, the odds that life is present and detectable increase. At the surface, oxidants—especially oxygen and hydrogen peroxide—are produced by ...
... viscous ice, and diving 100 km or more to the ocean floor, where the search would begin for a hypothetical volcanic vent. If the ice is thin enough to be permeable, the odds that life is present and detectable increase. At the surface, oxidants—especially oxygen and hydrogen peroxide—are produced by ...
Planet formation
... Snow line: 2.7 AU from the Sun, temperatures are low enough that molecules appear in the form of icy grains, and dust grains have sufficiently low temperatures to capture ice molecules in their mantles. The Snow line is crucial for the planet formation process, as ice-covered grains are suggested to ...
... Snow line: 2.7 AU from the Sun, temperatures are low enough that molecules appear in the form of icy grains, and dust grains have sufficiently low temperatures to capture ice molecules in their mantles. The Snow line is crucial for the planet formation process, as ice-covered grains are suggested to ...
Planets beyond Neptune
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities.Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the Voyager 2 spacecraft found that the irregularities observed in Uranus's orbit were due to a slight overestimation of Neptune's mass. After 1992, the discovery of numerous small icy objects with similar or even wider orbits than Pluto led to a debate over whether Pluto should remain a planet, or whether it and its neighbours should, like the asteroids, be given their own separate classification. Although a number of the larger members of this group were initially described as planets, in 2006 the International Astronomical Union reclassified Pluto and its largest neighbours as dwarf planets, leaving Neptune the farthest known planet in the Solar System.Today, the astronomical community widely agrees that Planet X, as originally envisioned, does not exist, but the concept of Planet X has been revived by a number of astronomers to explain other anomalies observed in the outer Solar System. In popular culture, and even among some astronomers, Planet X has become a stand-in term for any undiscovered planet in the outer Solar System, regardless of its relationship to Lowell's hypothesis. Other trans-Neptunian planets have also been suggested, based on different evidence. As of March 2014, observations with the WISE telescope have ruled out the possibility of a Saturn-sized object out to 10,000 AU, and a Jupiter-sized or larger object out to 26,000 AU.