Jupiter – Friend or Foe? IV:The influence of orbital eccentricity and
... eccentricity case, and centred at around 2.1 AU for the high eccentricity case). It is noteworthy that the region disrupted by that resonance is located further from the Sun when “Jupiter”’s eccentricity is increased. For clarity, we note that both the black and red curves start at 0 on the y-axis, ...
... eccentricity case, and centred at around 2.1 AU for the high eccentricity case). It is noteworthy that the region disrupted by that resonance is located further from the Sun when “Jupiter”’s eccentricity is increased. For clarity, we note that both the black and red curves start at 0 on the y-axis, ...
Atmospheric circulations of terrestrial planets orbiting low
... quantities are in cgs (centimeter, grams, seconds) units. Stars younger (older) than 4.5 byr will have smaller (larger) tidal locking radii. Results for stars of different masses are shown in Fig. 1. Within our own Solar System, Mercury avoids synchronous rotation even though it is within the Sun’s ...
... quantities are in cgs (centimeter, grams, seconds) units. Stars younger (older) than 4.5 byr will have smaller (larger) tidal locking radii. Results for stars of different masses are shown in Fig. 1. Within our own Solar System, Mercury avoids synchronous rotation even though it is within the Sun’s ...
Solar System Unit
... -Venus: Similar to Earth by both size and mass, the clouds trap heat making the planet extremely hot, the planet is toxic -Earth: made up of both water and land, the atmosphere and temperature supports life, haven for life, has one moon. -Mars: atmosphere is very thin, its nickname is the red planet ...
... -Venus: Similar to Earth by both size and mass, the clouds trap heat making the planet extremely hot, the planet is toxic -Earth: made up of both water and land, the atmosphere and temperature supports life, haven for life, has one moon. -Mars: atmosphere is very thin, its nickname is the red planet ...
History of Astronomy
... would first be seen to rise at sunrise, and when it could last be seen to rise at sunset. The grouping of the stars into constellations and recording their places was a useful observation. The theoretical prediction of eclipses of the sun and moon, and of the motions of the planets among the stars, ...
... would first be seen to rise at sunrise, and when it could last be seen to rise at sunset. The grouping of the stars into constellations and recording their places was a useful observation. The theoretical prediction of eclipses of the sun and moon, and of the motions of the planets among the stars, ...
Celestial Systems
... Describe how the Earth orbits the Sun and the Moon orbits the Earth. Describe the Sun (i.e., a medium-size star, the largest body in our solar system, major source of energy for phenomena on Earth’s surface). Describe how planets, asteroids, and comets orbit the Sun. Describe meteors (e.g., ...
... Describe how the Earth orbits the Sun and the Moon orbits the Earth. Describe the Sun (i.e., a medium-size star, the largest body in our solar system, major source of energy for phenomena on Earth’s surface). Describe how planets, asteroids, and comets orbit the Sun. Describe meteors (e.g., ...
General Astrophysics And Comparative Planetology
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
Lecture7_2014_v2
... we have to develop theories that match “circumstantial evidence” - what the Solar System is like today • Observed data (today) are most consistent with theory that all the planets formed out of the same cloud of gas at the same time • Some of the wide variety seen within the existing planets may be ...
... we have to develop theories that match “circumstantial evidence” - what the Solar System is like today • Observed data (today) are most consistent with theory that all the planets formed out of the same cloud of gas at the same time • Some of the wide variety seen within the existing planets may be ...
A Human-Powered Orrery: Connecting Learners with the Night Sky*
... have a student stand on each of the constellation positions. Use the constellation stick figures if you have these. First, have the student who represents the Earth stand looking in the direction of the Sun (something you should not do with the real Sun). Ask them what constellations are behind the ...
... have a student stand on each of the constellation positions. Use the constellation stick figures if you have these. First, have the student who represents the Earth stand looking in the direction of the Sun (something you should not do with the real Sun). Ask them what constellations are behind the ...
Kepler File
... private sessions, he used to teach Copernicus, while in public lectures at the university; he used to teach the old Ptolemaic model. Kepler embraced the Copernican system and remained a firm Copernican all his life. He embraced it even though there was no evidence for helio-centrism at this point. ...
... private sessions, he used to teach Copernicus, while in public lectures at the university; he used to teach the old Ptolemaic model. Kepler embraced the Copernican system and remained a firm Copernican all his life. He embraced it even though there was no evidence for helio-centrism at this point. ...
The Solar System
... around the Sun, (b) has sufficient mass for its selfgravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit. (2) A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has su ...
... around the Sun, (b) has sufficient mass for its selfgravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit. (2) A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has su ...
Theme 10.1 -- Leftovers: Comets
... Far away from the sun, however, the comet is completely inconspicuous and can be thought of as a “dirty snowball,” to use the phrase first introduced by astronomer Fred Whipple in the 1950s. The nucleus would be about 10 kilometres in diameter and consist of pebbles and small stones in a matrix of ...
... Far away from the sun, however, the comet is completely inconspicuous and can be thought of as a “dirty snowball,” to use the phrase first introduced by astronomer Fred Whipple in the 1950s. The nucleus would be about 10 kilometres in diameter and consist of pebbles and small stones in a matrix of ...
PSCI1030-CHAP016-The Solar System
... • Neptune also has a large dark spot similar to Jupiter’s and thought to be the result of large wind systems • Neptune and Uranus are similar in size and in the composition of their atmospheres • In many respects these two planets can be considered twins ...
... • Neptune also has a large dark spot similar to Jupiter’s and thought to be the result of large wind systems • Neptune and Uranus are similar in size and in the composition of their atmospheres • In many respects these two planets can be considered twins ...
EX PLANET E - Institute of Physics
... percentage of brightness on the y-axis and the time on the x-axis. An idealised light curve for a Jupiter-like planet crossing the disc of a Sun-like star is shown in figure 1a. On their worksheet, students are provided with a light curve and asked to sketch curves for a faster and a bigger planet. ...
... percentage of brightness on the y-axis and the time on the x-axis. An idealised light curve for a Jupiter-like planet crossing the disc of a Sun-like star is shown in figure 1a. On their worksheet, students are provided with a light curve and asked to sketch curves for a faster and a bigger planet. ...
Exoplanets Properties of the host stars Characterization of the
... Improvement in the knowledge of exoplanet host star distances by Hipparcos for the 100 brightest stars with exoplanets known with Doppler method in 2010. Left: ground based compilations of distances. Right: Hipparcos distances. ...
... Improvement in the knowledge of exoplanet host star distances by Hipparcos for the 100 brightest stars with exoplanets known with Doppler method in 2010. Left: ground based compilations of distances. Right: Hipparcos distances. ...
The Stability of Exomoons in the Habitable Zone
... conditions must then be upheld for quite some time to allow potential life to arise, meaning the orbit of the body must be fairly stable. In this investigation, all the objects at exoplanets.org (as of 2014-04-29) were evaluated to see which of these that could possibly have habitable moons, taking ...
... conditions must then be upheld for quite some time to allow potential life to arise, meaning the orbit of the body must be fairly stable. In this investigation, all the objects at exoplanets.org (as of 2014-04-29) were evaluated to see which of these that could possibly have habitable moons, taking ...
Copernican Revolution
... Considering Kepler's three laws of planetary motion (you do not have to memorize them): What shape orbit does a planet have? When a satellite orbits the Earth, does it move faster at perigee or at apogee? When a comet orbits the Sun, does it orbit faster at perihelion or at aphelion? What is meant b ...
... Considering Kepler's three laws of planetary motion (you do not have to memorize them): What shape orbit does a planet have? When a satellite orbits the Earth, does it move faster at perigee or at apogee? When a comet orbits the Sun, does it orbit faster at perihelion or at aphelion? What is meant b ...
What Goes Up, Must Come Down
... Kepler’s laws In 1597, after falling out of favor with the new Danish king, Brahe moved to Prague. There, he became the astronomer to the court of Emperor Rudolph of Bohemia where, in 1600, a 29-year-old German named Johannes Kepler (1571–1630) became one of his assistants. Although Brahe still bel ...
... Kepler’s laws In 1597, after falling out of favor with the new Danish king, Brahe moved to Prague. There, he became the astronomer to the court of Emperor Rudolph of Bohemia where, in 1600, a 29-year-old German named Johannes Kepler (1571–1630) became one of his assistants. Although Brahe still bel ...
Copernicus
... • Kepler first noted that the orbital path of a planet around the Sun is an ellipse, not a perfect circle • The Sun lies at one of the foci of the ellipse • The eccentricity of an ellipse is a measure of how 'squished' from a circle the shape is ...
... • Kepler first noted that the orbital path of a planet around the Sun is an ellipse, not a perfect circle • The Sun lies at one of the foci of the ellipse • The eccentricity of an ellipse is a measure of how 'squished' from a circle the shape is ...
unit2oursoloarsystem part2
... the first time a ring system has been found around a moon. The international Cassini spacecraft detected what appeared to be a large debris disk around the 950-mile-wide moon Rhea during a flyby in 2005. Scientists proposed that the halo likely contained particles ranging from the size of grains to ...
... the first time a ring system has been found around a moon. The international Cassini spacecraft detected what appeared to be a large debris disk around the 950-mile-wide moon Rhea during a flyby in 2005. Scientists proposed that the halo likely contained particles ranging from the size of grains 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.