On the migration of a system of protoplanets
... of the inner planet it has reached a mass of 2.3 MJup, while the outer planet has reached a mass of 3.2 MJup. The net gravitational torques exerted by the disc on the planets result in an inward migration of the outer planet on time-scales comparable to the viscous evolution time of the disc. The se ...
... of the inner planet it has reached a mass of 2.3 MJup, while the outer planet has reached a mass of 3.2 MJup. The net gravitational torques exerted by the disc on the planets result in an inward migration of the outer planet on time-scales comparable to the viscous evolution time of the disc. The se ...
On the migration of a system of protoplanets
... density of the disc. In the case of one disturber on a circular orbit, the pattern is stationary in the frame corotating with the planet. The presence of a second planet makes the spirals non-stationary, as is seen in the snapshots after 50, 100, 250 and 500 orbits of the inner planet that are displ ...
... density of the disc. In the case of one disturber on a circular orbit, the pattern is stationary in the frame corotating with the planet. The presence of a second planet makes the spirals non-stationary, as is seen in the snapshots after 50, 100, 250 and 500 orbits of the inner planet that are displ ...
Answer Choices
... Neptune has faint rings, Jupiter does not Jupiter has faint rings, Neptune does not Neptune has ice in its atmosphere and Jupiter does not Jupiter has ice in its atmosphere and Neptune does not ...
... Neptune has faint rings, Jupiter does not Jupiter has faint rings, Neptune does not Neptune has ice in its atmosphere and Jupiter does not Jupiter has ice in its atmosphere and Neptune does not ...
Motions of the Earth, moon, and sun
... Most celestial objects appear to move across the sky from east to west. Vast majority are stars. The paths of these celestial objects are circular, the polar constellations, or an arc. All motion is at a constant rate of 15 degrees per hour for a total of 360 degrees in 24 hours. ...
... Most celestial objects appear to move across the sky from east to west. Vast majority are stars. The paths of these celestial objects are circular, the polar constellations, or an arc. All motion is at a constant rate of 15 degrees per hour for a total of 360 degrees in 24 hours. ...
Vagabonds of the Solar System
... • Asteroids are relics of planetesimals that failed to accrete into a full-sized planet, because of the influence of Jupiter’s gravitational force • Without the effect of Jupiter, an Earth-sized planet might form in the asteroid belt • Jupiter’s gravitational pull “clears out” the asteroid belt by e ...
... • Asteroids are relics of planetesimals that failed to accrete into a full-sized planet, because of the influence of Jupiter’s gravitational force • Without the effect of Jupiter, an Earth-sized planet might form in the asteroid belt • Jupiter’s gravitational pull “clears out” the asteroid belt by e ...
Asteroid - Hoover12
... Earth impacts: small • Small: less than 50 m across at top of atmosphere – Happening all the time – Will burn up or break up in the atmosphere – Most are very tiny (‘pea’ sized) ...
... Earth impacts: small • Small: less than 50 m across at top of atmosphere – Happening all the time – Will burn up or break up in the atmosphere – Most are very tiny (‘pea’ sized) ...
The most common habitable planets – atmospheric characterization
... a magnitude that renders any spatial inhomogeneities in the atmosphere negligible, when compared with the response of the whole planet’s brightness temperature (the planet considered as a point source). As for the contribution of the solid surface of the planet to the thermal balance, the low therma ...
... a magnitude that renders any spatial inhomogeneities in the atmosphere negligible, when compared with the response of the whole planet’s brightness temperature (the planet considered as a point source). As for the contribution of the solid surface of the planet to the thermal balance, the low therma ...
Volume 1 (Issue 6), June 2012
... South America. Similarly, the transit is already in progress at sunrise for observers in central Asia, the Middle East, Europe, and eastern Africa. However the transit will not be visible from Portugal or southern Spain, western Africa, and the southeastern 2/3 of South America. ...
... South America. Similarly, the transit is already in progress at sunrise for observers in central Asia, the Middle East, Europe, and eastern Africa. However the transit will not be visible from Portugal or southern Spain, western Africa, and the southeastern 2/3 of South America. ...
ASTR 380 Possibilities for Life on the Moons of Giant Planets
... What if… Jupiter were 2-5 times bigger? -- it would still be hotter and could heat its moons. What if Jupiter’s inner moons were 10 times more massive? -- perhaps they could have held an atmosphere -- and retained more heat -- and have a liquid water surface…. These are possibilities – even likely s ...
... What if… Jupiter were 2-5 times bigger? -- it would still be hotter and could heat its moons. What if Jupiter’s inner moons were 10 times more massive? -- perhaps they could have held an atmosphere -- and retained more heat -- and have a liquid water surface…. These are possibilities – even likely s ...
Comparative Planetology of Venus and Mars
... The previous chapter grouped Earth’s moon and Mercury together because they are similar worlds. This chapter groups Venus and Mars together because we might expect them to be similar. They are Earthlike in their size and location in the solar system, so it is astonishing to see how different they ac ...
... The previous chapter grouped Earth’s moon and Mercury together because they are similar worlds. This chapter groups Venus and Mars together because we might expect them to be similar. They are Earthlike in their size and location in the solar system, so it is astonishing to see how different they ac ...
NEPTUNE*!
... Neptune is the smallest of the gas giants With an equatorial radius of only 24,764 km, Neptune is smaller than the other gas giants in the solar system Jupiter, Saturn and Uranus. But here's the funny thing, Neptune is actually more massive than Uranus by about 18%. Since it's smaller but more mass ...
... Neptune is the smallest of the gas giants With an equatorial radius of only 24,764 km, Neptune is smaller than the other gas giants in the solar system Jupiter, Saturn and Uranus. But here's the funny thing, Neptune is actually more massive than Uranus by about 18%. Since it's smaller but more mass ...
Huge Quantum Gravity Effects in the Solar System
... have quantum uncertainties of the same order of magnitude as the escape time itself, of the order of a billion billion (1018 ) years. With an escape velocity of the order of the orbital velocity of Uranus, 2 × 10−5 c, and with a Galactic size of the order of 25 kiloparsecs or close to 105 light year ...
... have quantum uncertainties of the same order of magnitude as the escape time itself, of the order of a billion billion (1018 ) years. With an escape velocity of the order of the orbital velocity of Uranus, 2 × 10−5 c, and with a Galactic size of the order of 25 kiloparsecs or close to 105 light year ...
In Orbit
... though it has since branched into simulations for other science disciplines. [More information on the website is available here: http://phet. colorado.edu/en/faqs] There are a number of options for running the simulation with your students. It is a good idea to explore the site first and determine h ...
... though it has since branched into simulations for other science disciplines. [More information on the website is available here: http://phet. colorado.edu/en/faqs] There are a number of options for running the simulation with your students. It is a good idea to explore the site first and determine h ...
PLANETS
... (assuming stellar mass is well-known, as it will be since to measure radial velocity we need exceptionally high S/N spectra of the star). Observable is a measure of mp sin(i). -> given vobs, we can obtain a lower limit to the planetary mass. In the absence of other constraints on the inclination, ra ...
... (assuming stellar mass is well-known, as it will be since to measure radial velocity we need exceptionally high S/N spectra of the star). Observable is a measure of mp sin(i). -> given vobs, we can obtain a lower limit to the planetary mass. In the absence of other constraints on the inclination, ra ...
Seeding Life on the Moons of the Outer Planets via Lithopanspermia
... Our primary interest for these simulations is in whether ejected material could carry life between Solar System bodies. Based on the estimates of Mileikowsky et al. (2000) that moderately-sized ejecta could shield organisms on timescales of millions of years, and the findings of Gladman et al. (199 ...
... Our primary interest for these simulations is in whether ejected material could carry life between Solar System bodies. Based on the estimates of Mileikowsky et al. (2000) that moderately-sized ejecta could shield organisms on timescales of millions of years, and the findings of Gladman et al. (199 ...
Planets in astrology
Planets in astrology have a meaning different from the modern astronomical understanding of what a planet is. Before the age of telescopes, the night sky was thought to consist of two very similar components: fixed stars, which remained motionless in relation to each other, and ""wandering stars"" (Ancient Greek: ἀστέρες πλανῆται asteres planetai), which moved relative to the fixed stars over the course of the year.To the Greeks and the other earliest astronomers, this group comprised the five planets visible to the naked eye, and excluded the Earth. Although strictly the term ""planet"" applied only to those five objects, the term was latterly broadened, particularly in the Middle Ages, to include the Sun and the Moon (sometimes referred to as ""Lights""), making a total of seven planets. Astrologers retain this definition today.To ancient astrologers, the planets represented the will of the gods and their direct influence upon human affairs. To modern astrologers the planets represent basic drives or urges in the unconscious, or energy flow regulators representing dimensions of experience. They express themselves with different qualities in the twelve signs of the zodiac and in the twelve houses. The planets are also related to each other in the form of aspects.Modern astrologers differ on the source of the planets' influence. Hone writes that the planets exert it directly through gravitation or another, unknown influence. Others hold that the planets have no direct influence in themselves, but are mirrors of basic organizing principles in the universe. In other words, the basic patterns of the universe repeat themselves everywhere, in fractal-like fashion, and ""as above so below"". Therefore, the patterns that the planets make in the sky reflect the ebb and flow of basic human impulses. The planets are also associated, especially in the Chinese tradition, with the basic forces of nature.Listed below are the specific meanings and domains associated with the astrological planets since ancient times, with the main focus on the Western astrological tradition. The planets in Hindu astrology are known as the Navagraha or ""nine realms"". In Chinese astrology, the planets are associated with the life forces of yin and yang and the five elements, which play an important role in the Chinese form of geomancy known as Feng Shui.