orbital resonances and chaos in the solar system
... of the 3:2 spin-orbit resonance, with its orbital period of 88 daysqand rotation period of 59 days. The width of the 3:2 spin-orbit resonance is a factor 7e/2 smaller than the 1:1. For Mercury, whose orbital eccentricity is 0.2, this factor is ∼ 0.84, so that the 3:2 resonance is nearly as strong as ...
... of the 3:2 spin-orbit resonance, with its orbital period of 88 daysqand rotation period of 59 days. The width of the 3:2 spin-orbit resonance is a factor 7e/2 smaller than the 1:1. For Mercury, whose orbital eccentricity is 0.2, this factor is ∼ 0.84, so that the 3:2 resonance is nearly as strong as ...
Comet Ion Tails Purpose Introduction Materials
... Explanation: In 1996, an unexpectedly bright comet passed by planet Earth. Discovered less than two months before, Comet C/1996 B2 Hyakutake came within only 1/10th of the Earth-Sun distance from the Earth in late March. At that time, Comet Hyakutake, dubbed the Great Comet of 1996, became the brigh ...
... Explanation: In 1996, an unexpectedly bright comet passed by planet Earth. Discovered less than two months before, Comet C/1996 B2 Hyakutake came within only 1/10th of the Earth-Sun distance from the Earth in late March. At that time, Comet Hyakutake, dubbed the Great Comet of 1996, became the brigh ...
X-Ray Properties of Young Stars and Stellar Clusters
... Star and planet formation is generally viewed as a hydrodynamic process involving gravitational collapse of interstellar material at low temperatures, 10–100 K in molecular cloud cores and 100–1500 K in protoplanetary disks. If thermodynamical equilibrium holds, this material should be neutral excep ...
... Star and planet formation is generally viewed as a hydrodynamic process involving gravitational collapse of interstellar material at low temperatures, 10–100 K in molecular cloud cores and 100–1500 K in protoplanetary disks. If thermodynamical equilibrium holds, this material should be neutral excep ...
Absolute Flux Calibration
... - They are quite compact (hence better for extended configurations and/or higher frequencies than planets) and still sufficiently bright (>500mJy@3mm) ...
... - They are quite compact (hence better for extended configurations and/or higher frequencies than planets) and still sufficiently bright (>500mJy@3mm) ...
Pulsed Accretion in the Young Binary &
... material since it is less sensitive to photospheric contributions than the 2.2 f-lm, and find similar results: 33/ 83 stars had optically thick disks (I::1N 2 1. 2 de x ). They also found that 3 of the stars had inner holes, signified by small near-infrared (A :::; 12f-lm) excesses arising at optica ...
... material since it is less sensitive to photospheric contributions than the 2.2 f-lm, and find similar results: 33/ 83 stars had optically thick disks (I::1N 2 1. 2 de x ). They also found that 3 of the stars had inner holes, signified by small near-infrared (A :::; 12f-lm) excesses arising at optica ...
The Formation of Population III Stars in Gas Accretion Stage: Effects
... field strength is weaker than B < G (n is the hydrogen ∼ 10 (n/1 cm ) number density), magnetic effects can be ignored. In this case, fragmentation ...
... field strength is weaker than B < G (n is the hydrogen ∼ 10 (n/1 cm ) number density), magnetic effects can be ignored. In this case, fragmentation ...
Save - Report Builder
... on Jupiter, either. Scientists believe Jupiter does not have a solid surface like Earth does. If you went to Jupiter, you would sink through its clouds. As you get closer to Jupiter’s core, the clouds get denser, or more pressed together. ...
... on Jupiter, either. Scientists believe Jupiter does not have a solid surface like Earth does. If you went to Jupiter, you would sink through its clouds. As you get closer to Jupiter’s core, the clouds get denser, or more pressed together. ...
Unraveling the Helix Nebula: Its Structure and Knots
... the Helix Nebula is composed of an inner-disk of material, surrounded by a lower ionization outer-ring that is almost perpendicular to the inner-disk. This interpretation is strengthened by its explanation of the complex radial velocity pattern described by radio and optical observations. There is a ...
... the Helix Nebula is composed of an inner-disk of material, surrounded by a lower ionization outer-ring that is almost perpendicular to the inner-disk. This interpretation is strengthened by its explanation of the complex radial velocity pattern described by radio and optical observations. There is a ...
ASTR 1010 - Sommers-Bausch Observatory
... Scales of temperature measurement are referenced to the freezing point and boiling point of water. In the United States, the Fahrenheit (F) scale is the one commonly used; water freezes at 32 °F and boils at 212 °F. In Europe, the Celsius system is usually used: water freezes at 0 °C and boils at 10 ...
... Scales of temperature measurement are referenced to the freezing point and boiling point of water. In the United States, the Fahrenheit (F) scale is the one commonly used; water freezes at 32 °F and boils at 212 °F. In Europe, the Celsius system is usually used: water freezes at 0 °C and boils at 10 ...
galileo and the discovery of the phases of venus
... light, but pointed out that “until the phases began to appear he [Galileo] could not rule out the possibility that Venus shone by its own light ...”.18 I shall further develop Gingerich’s argument, showing that Galileo was indeed deeply concerned with the long-debated question of celestial light and ...
... light, but pointed out that “until the phases began to appear he [Galileo] could not rule out the possibility that Venus shone by its own light ...”.18 I shall further develop Gingerich’s argument, showing that Galileo was indeed deeply concerned with the long-debated question of celestial light and ...
Moon Course Section 1-5 v1.0 - One
... into a crust, the heavier elements sank to form the lunar mantle. But our “new Moon” wasn't done collecting stray objects careening around the solar system. Asteroids were continuously being drawn toward the Moon, smashing into the surface and shattering it deep below. Some of these interventions we ...
... into a crust, the heavier elements sank to form the lunar mantle. But our “new Moon” wasn't done collecting stray objects careening around the solar system. Asteroids were continuously being drawn toward the Moon, smashing into the surface and shattering it deep below. Some of these interventions we ...
Orion the Hunter
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
TAKS objective 5 Earth and Space Systems
... The most widely accepted theory for the formation of the universe. It states that all matter & energy were once packed into a tiny particles smaller than speck of dust. This particle was incredibly hot & dense which suddenly began to expand. Overtime universe cooled & continued to expand. Evidence s ...
... The most widely accepted theory for the formation of the universe. It states that all matter & energy were once packed into a tiny particles smaller than speck of dust. This particle was incredibly hot & dense which suddenly began to expand. Overtime universe cooled & continued to expand. Evidence s ...
Deneb - Emmi
... chariot, and because of his bad driving that threatened to destroy the earth. Zeus hurled a thunderbolt at Phaethon, who fell into the Fridanus River. Phaethon's friend, Cygnus, dived into the water in search of Phaethon. Apollo took pity on Cygnus and changed him into a swan. ...
... chariot, and because of his bad driving that threatened to destroy the earth. Zeus hurled a thunderbolt at Phaethon, who fell into the Fridanus River. Phaethon's friend, Cygnus, dived into the water in search of Phaethon. Apollo took pity on Cygnus and changed him into a swan. ...
Measuring distances to the edge of the local group
... 3109 using Cepheid variable stars. These stars have a well-known period-luminosity relationship caused by the radial pulsation of the star, which was first characterized by Leavitt in 1912. They can thus be used as standard candles once the period of a particular star is known. To accomplish this, w ...
... 3109 using Cepheid variable stars. These stars have a well-known period-luminosity relationship caused by the radial pulsation of the star, which was first characterized by Leavitt in 1912. They can thus be used as standard candles once the period of a particular star is known. To accomplish this, w ...
SPICA Yellow Book
... what kinds of host stars, in which locations in the Galaxy, are the most favourable to the formation of planets” and “Investigate the conditions for star formation and evolution”. SPICA will have a far-IR spectrometer more than an order of magnitude more sensitive than any previous facility, enablin ...
... what kinds of host stars, in which locations in the Galaxy, are the most favourable to the formation of planets” and “Investigate the conditions for star formation and evolution”. SPICA will have a far-IR spectrometer more than an order of magnitude more sensitive than any previous facility, enablin ...
Evolution of stars
... d. produces the energy responsible for bipolar flows. e. combines four hydrogen nuclei to form one helium nucleus, which produces energy. What causes the outward pressure that balances the inward pull of gravity in a star? a. The outward flow of energy. b. The opacity of the gas. c. The temperature ...
... d. produces the energy responsible for bipolar flows. e. combines four hydrogen nuclei to form one helium nucleus, which produces energy. What causes the outward pressure that balances the inward pull of gravity in a star? a. The outward flow of energy. b. The opacity of the gas. c. The temperature ...
Disk planet interaction during the formation of extrasolar planets
... with a mass comparable to that of Jupiter have orbits close, less than 1.5 AU, to their stars. The solar nebula model predicts that the core of this type of planets form outside the so-called snowline, which lies roughly at 3-5 AU from the star. This means that the planets have to move radially inwa ...
... with a mass comparable to that of Jupiter have orbits close, less than 1.5 AU, to their stars. The solar nebula model predicts that the core of this type of planets form outside the so-called snowline, which lies roughly at 3-5 AU from the star. This means that the planets have to move radially inwa ...
Irregular Satellites of the Giant Planets
... history. They may thus constitute an intact sample of the planetesimals that accreted to form the cores of the jovian planets. Ranging in diameter from ~2 km to over 300 km, these bodies overlap the lower end of the presently known population of transneptunian objects (TNOs). Their size distribution ...
... history. They may thus constitute an intact sample of the planetesimals that accreted to form the cores of the jovian planets. Ranging in diameter from ~2 km to over 300 km, these bodies overlap the lower end of the presently known population of transneptunian objects (TNOs). Their size distribution ...
Family Space Day Overview - Comets
... http://www.windows.ucar.edu/tour/link=/comets/comet_il.html Amazing Space – Anatomy of a Comet http://amazing-space.stsci.edu/news/archive/2005/02/ill-01.php Astronomy Picture of the Day – Comet Halley’s Nucleus ...
... http://www.windows.ucar.edu/tour/link=/comets/comet_il.html Amazing Space – Anatomy of a Comet http://amazing-space.stsci.edu/news/archive/2005/02/ill-01.php Astronomy Picture of the Day – Comet Halley’s Nucleus ...
Full text - FNWI (Science) Education Service Centre
... not all of the planet-crossing comets were ejected. Some comets did not gain enough energy to be lost to the ISM but instead were perturbed onto orbits with very large semi-major axes. Their perihelion distances however, remained within the planetary orbits. This means that, although the comet will ...
... not all of the planet-crossing comets were ejected. Some comets did not gain enough energy to be lost to the ISM but instead were perturbed onto orbits with very large semi-major axes. Their perihelion distances however, remained within the planetary orbits. This means that, although the comet will ...
Asteroids in the inner Solar system II. Observable
... chemically similar to carbonaceous chondritic meteorites (so they have approximately the same composition as the Sun, minus hydrogen, helium and other volatiles). If the asteroid is seen at zero phase angle at a position where both r and D are 1 au, then its magnitude adjustment vanishes. The formul ...
... chemically similar to carbonaceous chondritic meteorites (so they have approximately the same composition as the Sun, minus hydrogen, helium and other volatiles). If the asteroid is seen at zero phase angle at a position where both r and D are 1 au, then its magnitude adjustment vanishes. The formul ...
The Origin of Planetary Ring Systems
... Clearly, memory of the initial ring mass through µ0 is erased once t̄ 1 / 60µ02 , and in the long term, µ(t) ≈ (60 t̄)−1/2 , independent of µ0 . Around Saturn, with t = 4.5 billion years, this gives µ = 8 × 10−8 . Note that this is a slowly varying function, so the result varies by only a factor o ...
... Clearly, memory of the initial ring mass through µ0 is erased once t̄ 1 / 60µ02 , and in the long term, µ(t) ≈ (60 t̄)−1/2 , independent of µ0 . Around Saturn, with t = 4.5 billion years, this gives µ = 8 × 10−8 . Note that this is a slowly varying function, so the result varies by only a factor o ...
History of Solar System formation and evolution hypotheses
Ideas concerning the origin and fate of the world date from the earliest known writings; however, for almost all of that time, there was no attempt to link such theories to the existence of a ""Solar System"", simply because almost no one knew or believed that the Solar System, in the sense we now understand it, existed. The first step towards a theory of Solar System formation was the general acceptance of heliocentrism, the model which placed the Sun at the centre of the system and the Earth in orbit around it. This conception had been gestating for thousands of years, but was only widely accepted by the end of the 17th century. The first recorded use of the term ""Solar System"" dates from 1704.