The Formation of Systems with Tightly
... Abrupt kinks for the 10 m solid are due to the piecewise Reynolds drag solution. While a smoother transition could be implemented, it will not change the general behavior. For solid sizes ∼ 10 cm to 10 m, the radial drift speeds become very large. In this model, which considers an isolated, single s ...
... Abrupt kinks for the 10 m solid are due to the piecewise Reynolds drag solution. While a smoother transition could be implemented, it will not change the general behavior. For solid sizes ∼ 10 cm to 10 m, the radial drift speeds become very large. In this model, which considers an isolated, single s ...
MEarth
... close-in habitable zone planets would lead either to atmospheric collapse or to steep temperature gradients and climatic conditions not suitable for life. Works reviewed in Scalo et al. and Tarter et al. argue that atmospheric heat circulation should prevent each of these barriers to habitability. R ...
... close-in habitable zone planets would lead either to atmospheric collapse or to steep temperature gradients and climatic conditions not suitable for life. Works reviewed in Scalo et al. and Tarter et al. argue that atmospheric heat circulation should prevent each of these barriers to habitability. R ...
Arguments for the presence of a distant large undiscovered Solar
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
Arguments for the presence of a distant large
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
Arguments for the presence of a distant large undiscovered Solar
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
... the Sun for the first time after perturbation by the unknown object. If this is the case, then examination of the aphelion longitudes and periods of the comets in Table 1 might give a clue to the present position of the object. The longitude Lh of the hypothetical planet may be taken, to a first app ...
Asteroids and Comets and Meteors, Oh My!
... sky; you would have to watch one for hours or days to see its movement. The center of a comet is a ball of frozen gas, dust, and water. Like planets or moons, comets orbit around the Sun. The comet that causes the Leonids is called Tempel-Tuttle. It is named after two scientists who discovered it at ...
... sky; you would have to watch one for hours or days to see its movement. The center of a comet is a ball of frozen gas, dust, and water. Like planets or moons, comets orbit around the Sun. The comet that causes the Leonids is called Tempel-Tuttle. It is named after two scientists who discovered it at ...
On the asymmetry of the distribution of observable comets induced
... of one example: the passage of one solar mass perturber within 10 000 AU from the Sun, moving at a velocity of 30 km s−1 . One way to search for anisotropic results of such a passage (used among others by W96) is to plot the rectangular positions of comets made observable (i.e. with perihelion dista ...
... of one example: the passage of one solar mass perturber within 10 000 AU from the Sun, moving at a velocity of 30 km s−1 . One way to search for anisotropic results of such a passage (used among others by W96) is to plot the rectangular positions of comets made observable (i.e. with perihelion dista ...
The Galactic Environment of the Sun
... electrons)—that streams outward from the sun at high speed. Its source is the solar corona, the tenuous, million-degree plasma surrounding the sun that is evident during a total solar eclipse as a halo of brilliant “hair” surrounding the darkened disk. The solar wind also contains an embedded magnet ...
... electrons)—that streams outward from the sun at high speed. Its source is the solar corona, the tenuous, million-degree plasma surrounding the sun that is evident during a total solar eclipse as a halo of brilliant “hair” surrounding the darkened disk. The solar wind also contains an embedded magnet ...
CAPSTONE-poster
... the Owl nebula converted into 8.9*1012km. To find the age, t = d/v equation was used where v = 40 km/s which is the rate at which the outer helium shell expands away from the core and d = 8.9*1012km calculated above. The age of the Owl nebula was worked out to be 7050.5 years. RA=168.69134, Dec=55.0 ...
... the Owl nebula converted into 8.9*1012km. To find the age, t = d/v equation was used where v = 40 km/s which is the rate at which the outer helium shell expands away from the core and d = 8.9*1012km calculated above. The age of the Owl nebula was worked out to be 7050.5 years. RA=168.69134, Dec=55.0 ...
The Clouds
... There is overwhelming evidence that stars are born inside clouds. Yet it was not always obvious that this had to be so. Stars could have been eternal beacons in a steady-state Universe. They could have come into existence in the early Universe, or simply built up through collisions and coagulation o ...
... There is overwhelming evidence that stars are born inside clouds. Yet it was not always obvious that this had to be so. Stars could have been eternal beacons in a steady-state Universe. They could have come into existence in the early Universe, or simply built up through collisions and coagulation o ...
The Chemical Composition of an Extrasolar Kuiper-Belt
... and Ni are detected, with nitrogen observed for the first time in extrasolar planetary debris. The nitrogen mass fraction is ∼2%, comparable to that in comet Halley and higher than in any other known solar system object. The lower limit to the accreted mass is ∼1022 g, which is about one hundred thou ...
... and Ni are detected, with nitrogen observed for the first time in extrasolar planetary debris. The nitrogen mass fraction is ∼2%, comparable to that in comet Halley and higher than in any other known solar system object. The lower limit to the accreted mass is ∼1022 g, which is about one hundred thou ...
Terrestrial Planets
... planets with different eccentricities Of the first 100 stars found to harbor planets, more than 30 stars host a Jupiter-sized world in an orbit smaller than Mercury's, whizzing around its star in a matter of days. This implies: Planet formation is a contest, where a growing planet must fight for sur ...
... planets with different eccentricities Of the first 100 stars found to harbor planets, more than 30 stars host a Jupiter-sized world in an orbit smaller than Mercury's, whizzing around its star in a matter of days. This implies: Planet formation is a contest, where a growing planet must fight for sur ...
Age Distributions of Low Mass Stars in the Rho Ophiucus Molecular
... The Rho Ophiuchi (Rho Oph) cloud complex is a cluster of star-forming molecular clouds in the constellation Ophiuchus. The coordinates are right ascension of 16h 28m 06s and declination of –24d 32.5s [1]. This makes it accessible from both hemispheres. It consists of two main regions of dense gas an ...
... The Rho Ophiuchi (Rho Oph) cloud complex is a cluster of star-forming molecular clouds in the constellation Ophiuchus. The coordinates are right ascension of 16h 28m 06s and declination of –24d 32.5s [1]. This makes it accessible from both hemispheres. It consists of two main regions of dense gas an ...
suggested
... light by the interposition of obscure bodies, or aggregations of bodies, invisibly thronging space’’. It was not until the work of Trumpler in 1930 [2] that the first evidence for interstellar reddening was found; which would imply that many stars were cooler than predicted. This reddening has nothin ...
... light by the interposition of obscure bodies, or aggregations of bodies, invisibly thronging space’’. It was not until the work of Trumpler in 1930 [2] that the first evidence for interstellar reddening was found; which would imply that many stars were cooler than predicted. This reddening has nothin ...
Lecture 7: Extrasolar Planets 01/08/2013 update: 725 exoplanets
... different eccentricities Of the first 100 stars found to harbor planets, more than 30 stars host a Jupiter-sized world in an orbit smaller than Mercury's, whizzing around its star in a matter of days. This implies: Planet formation is a contest, where a growing planet must fight for survival lest it ...
... different eccentricities Of the first 100 stars found to harbor planets, more than 30 stars host a Jupiter-sized world in an orbit smaller than Mercury's, whizzing around its star in a matter of days. This implies: Planet formation is a contest, where a growing planet must fight for survival lest it ...
What makes a planet habitable?
... 20EUV (4.13 Gyr ago): subsolar obstacle distance 12.7REarth N+ion pick up loss rate ~2 ×1030 s-1 Total loss of nitrogen would result in an equivalent amount of ≤ 20 bar during ~ 50 Myr Simulations indicate that the atmosphere should have been protected more efficiently most likely due to higher carb ...
... 20EUV (4.13 Gyr ago): subsolar obstacle distance 12.7REarth N+ion pick up loss rate ~2 ×1030 s-1 Total loss of nitrogen would result in an equivalent amount of ≤ 20 bar during ~ 50 Myr Simulations indicate that the atmosphere should have been protected more efficiently most likely due to higher carb ...
shirley - Yancy L. Shirley`s Webpage
... stimulated processes in the formation of stars of various mass? What governs the SFR in a molecular cloud? What determined the IMF evolution from molecular cloud clumps to stars? Do stars form in a process of fragmentation of an overall ...
... stimulated processes in the formation of stars of various mass? What governs the SFR in a molecular cloud? What determined the IMF evolution from molecular cloud clumps to stars? Do stars form in a process of fragmentation of an overall ...
Artificial comets
... dust tail. The comet’s activity, the emission of gases, begins and ends at a distance of 3 astronomical units1 between Sun and comet. ...
... dust tail. The comet’s activity, the emission of gases, begins and ends at a distance of 3 astronomical units1 between Sun and comet. ...
Lecture13.v2 - Lick Observatory
... gravity strongly perturbed the orbits of almost all the asteroids • Most of them got nudged into highly eccentric orbits, from which they either leave the Solar System or head inwards toward the Sun • A fraction of the asteroids headed inwards may have hit the early Earth! Page 23 ...
... gravity strongly perturbed the orbits of almost all the asteroids • Most of them got nudged into highly eccentric orbits, from which they either leave the Solar System or head inwards toward the Sun • A fraction of the asteroids headed inwards may have hit the early Earth! Page 23 ...
Planetary Radii Across Five Orders of Magnitude in Mass and Stellar
... serves as the bottleneck for cooling above the adiabatic H/He envelope. This is accounted for with our fully nongray, self-consistent model atmosphere grids. The importance of using detailed atmosphere models for evolutionary calculations of hot Jupiters is discussed in Baraffe et al. (2003) and Mar ...
... serves as the bottleneck for cooling above the adiabatic H/He envelope. This is accounted for with our fully nongray, self-consistent model atmosphere grids. The importance of using detailed atmosphere models for evolutionary calculations of hot Jupiters is discussed in Baraffe et al. (2003) and Mar ...
What is a planet? - X-ray and Observational Astronomy Group
... massive, close-in planets • It is not yet sensitive to planets as small as Earth, even close-in • As orbital period increases, the method becomes insensitive to planets less massive than Jupiter • The length of time that the surveys have been active (since 1989) sets the upper orbital period limit – ...
... massive, close-in planets • It is not yet sensitive to planets as small as Earth, even close-in • As orbital period increases, the method becomes insensitive to planets less massive than Jupiter • The length of time that the surveys have been active (since 1989) sets the upper orbital period limit – ...
comets, asteroids
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
Comets
... Spacecraft Exploration – In recent years, several spacecraft directly observed the nuclei of certain comets. In 1986, the European Space Agency’s Giotto probe and the Soviet Union’s Vega 1 and Vega 2 photograph the nucleus of Comet Halley 12. In 2002, NASA’s Deep Space 1 probe obtained highresolutio ...
... Spacecraft Exploration – In recent years, several spacecraft directly observed the nuclei of certain comets. In 1986, the European Space Agency’s Giotto probe and the Soviet Union’s Vega 1 and Vega 2 photograph the nucleus of Comet Halley 12. In 2002, NASA’s Deep Space 1 probe obtained highresolutio ...
Catching Planets in Formation with GMT
... Late Heavy Current age of Bombardment the Sun: (600 Myr) 4.5x109 yrs. ...
... Late Heavy Current age of Bombardment the Sun: (600 Myr) 4.5x109 yrs. ...
A Human-Powered Orrery - Astronomical Society of the Pacific
... Generation Science Standards had just been released for its second public review. While there may be some changes made in response to this review, the Standards will still be aligned with the Core Ideas of the NRC’s Framework for K-12 Education (2011) and while some details may change, it is unlikel ...
... Generation Science Standards had just been released for its second public review. While there may be some changes made in response to this review, the Standards will still be aligned with the Core Ideas of the NRC’s Framework for K-12 Education (2011) and while some details may change, it is unlikel ...