File - xaviantvision
... watching the stars, noted five that did more than rise and set in stolid procession, as the so-called "fixed" stars did. These five had a curious and complex motion. Over the months they seemed to wander slowly among the stars. Sometimes they did loops. Today we call them planets, the Greek word for ...
... watching the stars, noted five that did more than rise and set in stolid procession, as the so-called "fixed" stars did. These five had a curious and complex motion. Over the months they seemed to wander slowly among the stars. Sometimes they did loops. Today we call them planets, the Greek word for ...
Elements of astronomy
... escope of considerable power all the brighter stars can be seen throughout the day, unless very near the sun and, by the method of observation already described, we find that ...
... escope of considerable power all the brighter stars can be seen throughout the day, unless very near the sun and, by the method of observation already described, we find that ...
CHaracterising ExOPlanets Satellite arXiv:1310.7800v1 [astro
... other stars than our Sun – the so-called exoplanets. is based on the radial-velocity measurement which Those numerous discoveries unveiled objects that does not yield information on the dimensions other are beyond what was thought to be possible. With than an estimate of the mass of the object orbit ...
... other stars than our Sun – the so-called exoplanets. is based on the radial-velocity measurement which Those numerous discoveries unveiled objects that does not yield information on the dimensions other are beyond what was thought to be possible. With than an estimate of the mass of the object orbit ...
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... companion to the star 51 Pegasi, circling the sun-like star at a distance of a = 0.05 AU, one hundredth of the distance between Jupiter and the Sun. Just months later, Jovian and super-Jovian mass companions were announced by Marcy & Butler (1996a) around 70 Virginis (a = 0.43 AU), Butler & Marcy (1 ...
... companion to the star 51 Pegasi, circling the sun-like star at a distance of a = 0.05 AU, one hundredth of the distance between Jupiter and the Sun. Just months later, Jovian and super-Jovian mass companions were announced by Marcy & Butler (1996a) around 70 Virginis (a = 0.43 AU), Butler & Marcy (1 ...
starry night companion
... is 5°. The sides of the Great Square of Pegasus average 15° in length. The distance from one end of the W of Cassiopeia to the other is 13∞. The distance from Betelgeuse to Rigel in Orion is 19°, and the length of Orion’s belt is just under 3°. Your hand is a portable angle-measurer. The width of yo ...
... is 5°. The sides of the Great Square of Pegasus average 15° in length. The distance from one end of the W of Cassiopeia to the other is 13∞. The distance from Betelgeuse to Rigel in Orion is 19°, and the length of Orion’s belt is just under 3°. Your hand is a portable angle-measurer. The width of yo ...
What are Jupiter and its moons like? - Harvard
... Remember, “Don’t look it up... look up!” Good luck. ...
... Remember, “Don’t look it up... look up!” Good luck. ...
pdf of talks and poster abstracts
... stellar groups (mostly with ages <108 yr) have been discovered within a 100 pc of the Sun – mostly aided by Hipparcos mas-level astrometry. The youngest of the nearby groups (β Pic, TW Hya, η Cha, ε Cha) appear to be outlying subgroups of Sco-Cen, the nearest OB association. Young substellar objects ...
... stellar groups (mostly with ages <108 yr) have been discovered within a 100 pc of the Sun – mostly aided by Hipparcos mas-level astrometry. The youngest of the nearby groups (β Pic, TW Hya, η Cha, ε Cha) appear to be outlying subgroups of Sco-Cen, the nearest OB association. Young substellar objects ...
Stellarium User Guide - Skolekonsulenterne.dk
... As well as travelling through time, Stellarium lets to look around the sky freely, and zoom in and out. There are several ways to accomplish this listed in table 3.4. Let’s try it. Use the cursors to move around left, right, up and down. Zoom in a little using the Page Up key, and back out again usi ...
... As well as travelling through time, Stellarium lets to look around the sky freely, and zoom in and out. There are several ways to accomplish this listed in table 3.4. Let’s try it. Use the cursors to move around left, right, up and down. Zoom in a little using the Page Up key, and back out again usi ...
mission design - Messenger - The Johns Hopkins University Applied
... Mercury’s orbit around the Sun is much more oval-shaped (eccentric) than the Earth’s. This means that unlike the Earth, whose distance from the Sun does not vary much during the year, Mercury’s distance from the Sun varies by about 40% during its year. As a result, the size of the Sun seen from Merc ...
... Mercury’s orbit around the Sun is much more oval-shaped (eccentric) than the Earth’s. This means that unlike the Earth, whose distance from the Sun does not vary much during the year, Mercury’s distance from the Sun varies by about 40% during its year. As a result, the size of the Sun seen from Merc ...
Planetary migration in a planetesimal disk: why did
... above. For the reasons explained in section 2, Saturn, Uranus and Neptune on average migrate outward, while Jupiter migrates inward. Neptune undergoes forced migration because these disks are massive. Consequently, the planet eventually migrates to the edge of the disk (and in fact goes slightly bey ...
... above. For the reasons explained in section 2, Saturn, Uranus and Neptune on average migrate outward, while Jupiter migrates inward. Neptune undergoes forced migration because these disks are massive. Consequently, the planet eventually migrates to the edge of the disk (and in fact goes slightly bey ...
Astrobiology - Anatomy Atlases
... Thematic Quote "In the beginning, when all was fire, there were no stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capa ...
... Thematic Quote "In the beginning, when all was fire, there were no stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capa ...
The chemical composition of solar-type stars and its impact on the
... on the gravitational lensing effect of its host star is measured, and pulsar timing, that lead to the first discovery of an exoplanet in 1992. With the pulsar timing method, observers examine small variations in the extremely periodic radio emission pattern of a star, that are caused by planets. How ...
... on the gravitational lensing effect of its host star is measured, and pulsar timing, that lead to the first discovery of an exoplanet in 1992. With the pulsar timing method, observers examine small variations in the extremely periodic radio emission pattern of a star, that are caused by planets. How ...
Observations of the asteroid 4844 Matsuyama
... We think that we have successfully catched our object: first with the big Schmidt telescope and then- with a future cosmic mission to our asteroid. On basis of our knowledge about this asteroid, we simulated its own movement in the time to select the most appropriate time for launching a cosmic dril ...
... We think that we have successfully catched our object: first with the big Schmidt telescope and then- with a future cosmic mission to our asteroid. On basis of our knowledge about this asteroid, we simulated its own movement in the time to select the most appropriate time for launching a cosmic dril ...
In Class Activity Manual - Department of Physics and Astronomy
... find many other instances to use cooperative learning. Show a video? Ask for an analysis! Do a demonstration? Query for the main point or concept! Want feedback? Request a “few minute” paper, by group consensus, at the end of class! A few comments on the activities themselves. They are roughly arran ...
... find many other instances to use cooperative learning. Show a video? Ask for an analysis! Do a demonstration? Query for the main point or concept! Want feedback? Request a “few minute” paper, by group consensus, at the end of class! A few comments on the activities themselves. They are roughly arran ...
Life - Anatomy Atlases
... Thematic Quote "In the beginning, when all was fire, there were no stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capa ...
... Thematic Quote "In the beginning, when all was fire, there were no stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capa ...
Project Description - SDSS-III
... ratio ∼1:6, flat space, and primordial fluctuations with the statistical properties predicted by inflation. This model requires one very surprising ingredient, “dark energy,” which drives accelerating expansion of the Universe. Large-scale imaging and spectroscopic surveys have revealed rich, comple ...
... ratio ∼1:6, flat space, and primordial fluctuations with the statistical properties predicted by inflation. This model requires one very surprising ingredient, “dark energy,” which drives accelerating expansion of the Universe. Large-scale imaging and spectroscopic surveys have revealed rich, comple ...
Extrasolar Kuiper Belt Dust Disks
... ever, in Trapezium-like conditions (Hillenbrand and Hartman, 1998), where stars form within groups/clusters containing >100 members, at larger distances from the star photoevaporation takes place on a faster timescale than coagulation, and the dust is carried away by the evaporating gas causing a sh ...
... ever, in Trapezium-like conditions (Hillenbrand and Hartman, 1998), where stars form within groups/clusters containing >100 members, at larger distances from the star photoevaporation takes place on a faster timescale than coagulation, and the dust is carried away by the evaporating gas causing a sh ...
dynamical history of the asteroid belt and implications for terrestrial
... migration. Giant planet migration caused both mean motion and secular resonances to sweep across the main asteroid belt, raising the eccentricity of asteroids into planet-crossing orbits and depleting the belt. I show that the present-day semimajor axis and eccentricity distributions of large main b ...
... migration. Giant planet migration caused both mean motion and secular resonances to sweep across the main asteroid belt, raising the eccentricity of asteroids into planet-crossing orbits and depleting the belt. I show that the present-day semimajor axis and eccentricity distributions of large main b ...
Uranus - Stockton University
... craters, but the most outstanding features are long rift valleys stretching across the entire surface. Canyons much like the ones on Mars appear in the pictures. The canyon floors appear as though they have been smoothed by a fluid. ...
... craters, but the most outstanding features are long rift valleys stretching across the entire surface. Canyons much like the ones on Mars appear in the pictures. The canyon floors appear as though they have been smoothed by a fluid. ...
Preprint - Lunar and Planetary Laboratory
... as the populations used by Nesvorný and Dones (2002) for their study of long term stability of Neptune Trojans subject to planetary perturbations in the present configuration of the solar system. They found that roughly 50% of the Neptune Trojan population survived after 4 × 109 years. A direct app ...
... as the populations used by Nesvorný and Dones (2002) for their study of long term stability of Neptune Trojans subject to planetary perturbations in the present configuration of the solar system. They found that roughly 50% of the Neptune Trojan population survived after 4 × 109 years. A direct app ...
A search for a new class of pulsating DA white dwarf stars in the DB
... down to the low temperature limit set by the age of the Galaxy, it is a remarkable and intriguing fact that few helium atmosphere white dwarfs occur in the effective temperature range between 45 000 ≥ T eff ≥ 30, 000 K. The DOs and DBs are found on either side of this temperature range, but only a v ...
... down to the low temperature limit set by the age of the Galaxy, it is a remarkable and intriguing fact that few helium atmosphere white dwarfs occur in the effective temperature range between 45 000 ≥ T eff ≥ 30, 000 K. The DOs and DBs are found on either side of this temperature range, but only a v ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.