Planets Orbiting the Sun and Other Stars - Beck-Shop
... http://www.worldscibooks.com/physics/p690.html ...
... http://www.worldscibooks.com/physics/p690.html ...
American Scientist
... may be the size of planetesimals or even exoplanets. The issue then is not that one cannot form structures, but rather that the gravitational instability paradigm lacks predictive power. Again, the devil is in the details. A successful theory of gravitational instability should start from the initia ...
... may be the size of planetesimals or even exoplanets. The issue then is not that one cannot form structures, but rather that the gravitational instability paradigm lacks predictive power. Again, the devil is in the details. A successful theory of gravitational instability should start from the initia ...
Document
... physical properties then several of these clouds are needed to account for the velocities measured around the sun. ...
... physical properties then several of these clouds are needed to account for the velocities measured around the sun. ...
Lyman-α: The Many Applications and Challenges of This Powerful
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
... density ratio (D/H), which is an important test of the density of ordinary matter and the creation of H, D, and He in the very early Universe. Since, the observed D/H ratios in the Galactic disk gas are altered by many competing processes, sorting out these processes requires accurate D/H measuremen ...
Kuiper Belt
... • Notice from the image that the Kuiper Belt is relatively flat, like the rest of the solar system. • Also notice that Pluto’s orbit takes it kinda over and under the Kuiper Belt, but certainly out far enough. • Despite being really friggin’ far away (“really friggin’” = 30-50 au), the Kuiper Belt h ...
... • Notice from the image that the Kuiper Belt is relatively flat, like the rest of the solar system. • Also notice that Pluto’s orbit takes it kinda over and under the Kuiper Belt, but certainly out far enough. • Despite being really friggin’ far away (“really friggin’” = 30-50 au), the Kuiper Belt h ...
Setting the Stage for Habitable Planets
... review, habitability refers to the capability of starting life and sustaining it. A habitable planet could include an environment capable of supporting only one or two extremophile species in low abundance or a lush and diverse biosphere. The word “life” can also take on a number of meanings. Someti ...
... review, habitability refers to the capability of starting life and sustaining it. A habitable planet could include an environment capable of supporting only one or two extremophile species in low abundance or a lush and diverse biosphere. The word “life” can also take on a number of meanings. Someti ...
Astrophysical and astrochemical insights into the origin of life
... before reaching the shelter of a dense interstellar cloud. In contrast, both silicate and organic dust grains can survive for extended periods of time in the diffuse ISM and may then be incorporated into dense clouds, where they may acquire icy mantles, be processed in various ways, and serve as sit ...
... before reaching the shelter of a dense interstellar cloud. In contrast, both silicate and organic dust grains can survive for extended periods of time in the diffuse ISM and may then be incorporated into dense clouds, where they may acquire icy mantles, be processed in various ways, and serve as sit ...
Interstellar Space
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
Interstellar Space Not as Empty as you Might Think
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
Interstellar Space Not as Empty as you Might Think
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. ...
New Worlds Ahead: The Discovery of Exoplanets
... perpendicular to this plane, and the direction of the Sun rotation is the same as the planets revolution around the Sun. These observations gave birth to the Solar nebula theory, which was proposed by Kant and Laplace more that two hundred years ago, but, although correct, it has been for decades th ...
... perpendicular to this plane, and the direction of the Sun rotation is the same as the planets revolution around the Sun. These observations gave birth to the Solar nebula theory, which was proposed by Kant and Laplace more that two hundred years ago, but, although correct, it has been for decades th ...
ExTRaSOLaR pLaNeTS
... The gravity of a large object will bend the light from distant objects and amplify it, acting like a magnifying lens. When light from the background object travels toward Earth, its path is bent or warped as it bypasses any large foreground object that is aligned with the background light source. As ...
... The gravity of a large object will bend the light from distant objects and amplify it, acting like a magnifying lens. When light from the background object travels toward Earth, its path is bent or warped as it bypasses any large foreground object that is aligned with the background light source. As ...
Educational Brief
... Our solar system is located in an unusual region of space called the Local Bubble. The Local Bubble is about 300 light years in radius and is filled with extremely low density gas (about 0.001 gas atoms per cubic centimeter) - this is much less dense than the ISM surrounding it. The coffee mug that ...
... Our solar system is located in an unusual region of space called the Local Bubble. The Local Bubble is about 300 light years in radius and is filled with extremely low density gas (about 0.001 gas atoms per cubic centimeter) - this is much less dense than the ISM surrounding it. The coffee mug that ...
PowerPoint
... a) Clouds fragment into smaller objects, forming many stars at one time. b) One star forms; other matter goes into planets, moons, asteroids, & comets. c) Clouds rotate & throw off mass until only enough is left to form one star. ...
... a) Clouds fragment into smaller objects, forming many stars at one time. b) One star forms; other matter goes into planets, moons, asteroids, & comets. c) Clouds rotate & throw off mass until only enough is left to form one star. ...
Fulltext
... into larger grains, etc. until big enough bodies are created that their gravity takes over the process, and carries it up to the bodies of planetary size. Large bodies are also capable of bonding the surrounding gas to them thus creating atmospheres around the solid cores. An atmosphere can also be ...
... into larger grains, etc. until big enough bodies are created that their gravity takes over the process, and carries it up to the bodies of planetary size. Large bodies are also capable of bonding the surrounding gas to them thus creating atmospheres around the solid cores. An atmosphere can also be ...
A scenario of planet erosion by coronal radiation*
... displayed in Fig. 3 is also consistent with the effects of erosion, since planets with higher densities would suffer less erosion, resulting in a population of massive planets in the long term that are denser than lower mass planets. Gaseous planets should not substantially increase their density, whi ...
... displayed in Fig. 3 is also consistent with the effects of erosion, since planets with higher densities would suffer less erosion, resulting in a population of massive planets in the long term that are denser than lower mass planets. Gaseous planets should not substantially increase their density, whi ...
PPT
... How many wave per sec? Freq. = speed/wavelength Freq. = 1015 Hz 1,000,000,000,000,000 waves per second! ...
... How many wave per sec? Freq. = speed/wavelength Freq. = 1015 Hz 1,000,000,000,000,000 waves per second! ...
Darwin – A Mission to Detect, and Search for Life on, Extrasolar
... between star and planet occurs. The baseline mission lasts 5 years and consists of approximately 200 individual target stars. Among these, 25 to 50 planetary systems can be studied spectroscopically, searching for gases such as CO2, H2O, CH4 and O3. Many of the key technologies required for the cons ...
... between star and planet occurs. The baseline mission lasts 5 years and consists of approximately 200 individual target stars. Among these, 25 to 50 planetary systems can be studied spectroscopically, searching for gases such as CO2, H2O, CH4 and O3. Many of the key technologies required for the cons ...
A rocky planet transiting a nearby low-mass star
... the strong tides and intense stellar activity of the M-dwarf planetary environment influence the evolution of terrestrial atmospheres. This understanding will be important for the long-term goal of looking for life on planets orbiting nearby small stars. ...
... the strong tides and intense stellar activity of the M-dwarf planetary environment influence the evolution of terrestrial atmospheres. This understanding will be important for the long-term goal of looking for life on planets orbiting nearby small stars. ...
4 Viable Transfer of Microorganisms in the Solar System and
... meteorites, the survival of microbes was tested after subjecting spores of Bacillus subtilis to accelerations, jerks or shock waves. Accelerations as they occur during planetary ejections are apparently not a barrier to interplanetary transfer of life. Bacteria are routinely treated with even higher ...
... meteorites, the survival of microbes was tested after subjecting spores of Bacillus subtilis to accelerations, jerks or shock waves. Accelerations as they occur during planetary ejections are apparently not a barrier to interplanetary transfer of life. Bacteria are routinely treated with even higher ...
KEPLER: Search for Earth-Size Planets in the Habitable Zone
... those locations where giant planets are commonly found: 0.05, 0.1, 0.2, 0.4, 0.6, 0.8. 1.0, 12., & 1.5 AU. When the position of the HZ is near any of the latter positions, the model assumes that the probability of a planet at that position is zero. To illustrate the capability of the instrument to r ...
... those locations where giant planets are commonly found: 0.05, 0.1, 0.2, 0.4, 0.6, 0.8. 1.0, 12., & 1.5 AU. When the position of the HZ is near any of the latter positions, the model assumes that the probability of a planet at that position is zero. To illustrate the capability of the instrument to r ...
Planet formation in the habitable zone of alpha Centauri B
... possibility for the present α Cen B case, assuming the same parameters for gas dispersion as Xie & Zhou (2008): ρg ∝ (t/τdiss )−1.5 , with τdiss = 105 years. The dissipation is started at 104 years, the end of our nominal run, when all orbits have reached their size-dependent alignment in the HZ. Fi ...
... possibility for the present α Cen B case, assuming the same parameters for gas dispersion as Xie & Zhou (2008): ρg ∝ (t/τdiss )−1.5 , with τdiss = 105 years. The dissipation is started at 104 years, the end of our nominal run, when all orbits have reached their size-dependent alignment in the HZ. Fi ...
Dynamics of disks with planets
... The standard model of planet formation agrees with numerous observations of circumstellar disks. Many dusty disks known as Vega-excess systems (because of infrared radiation detected by satellite IRAS around Vega, much exceeding the flux from the star itself) are good, if not exact, analogues of an ...
... The standard model of planet formation agrees with numerous observations of circumstellar disks. Many dusty disks known as Vega-excess systems (because of infrared radiation detected by satellite IRAS around Vega, much exceeding the flux from the star itself) are good, if not exact, analogues of an ...
Importance of Biologically Active Aurora
... hours above the atmosphere for several billion years, with larger fluences at longer intervals (see, for example, the flare energy distribution found by Güdel et al. 2003). Even the steady coronal X-ray fluxes of these stars will be on average 102-104 times larger than the Earth’s exposure to the su ...
... hours above the atmosphere for several billion years, with larger fluences at longer intervals (see, for example, the flare energy distribution found by Güdel et al. 2003). Even the steady coronal X-ray fluxes of these stars will be on average 102-104 times larger than the Earth’s exposure to the su ...