The Formation of Systems with Tightly
... The NASA Kepler mission has revealed an abundant class of Systems with Tightlypacked Inner Planets (STIPs). The current paradigm for planet formation suggests that small planetesimals will quickly spiral into the host star due to aerodynamic drag, preventing rocky planet formation. In contrast, we f ...
... The NASA Kepler mission has revealed an abundant class of Systems with Tightlypacked Inner Planets (STIPs). The current paradigm for planet formation suggests that small planetesimals will quickly spiral into the host star due to aerodynamic drag, preventing rocky planet formation. In contrast, we f ...
direct contact among galactic civilizations by relativistic
... Planets of double and multiple star systems are expected in general to have-over astronomical timescales-such erratic orbits that the evolution of life on them is deemed unlikely’20). I fail to find this argument entirely convincing; but for conservative reasons it will be included in the discussion ...
... Planets of double and multiple star systems are expected in general to have-over astronomical timescales-such erratic orbits that the evolution of life on them is deemed unlikely’20). I fail to find this argument entirely convincing; but for conservative reasons it will be included in the discussion ...
The Milky Way
... • Dense clusters of 50,000 – a million stars • Old (~ 11 billion years), lower-main-sequence stars • Approx. 200 globular clusters in our Milky Way ...
... • Dense clusters of 50,000 – a million stars • Old (~ 11 billion years), lower-main-sequence stars • Approx. 200 globular clusters in our Milky Way ...
an Educator`s GuidE - Museum of Science, Boston
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
an Educator`s GuidE
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
Planet formation Abstract Megan K Pickett and Andrew J Lim
... not entirely certain, it is on the order of or smaller than the timescale for core-accretion. Thus, by the time a core reaches the trigger mass, the nebular gas may have disappeared. There may be exposed cores of failed gas giants in the universe, but they are not among the extrasolar planets so far ...
... not entirely certain, it is on the order of or smaller than the timescale for core-accretion. Thus, by the time a core reaches the trigger mass, the nebular gas may have disappeared. There may be exposed cores of failed gas giants in the universe, but they are not among the extrasolar planets so far ...
Beers_First_Stars_NIC_School
... Abstract: Numerical simulations of structure formation in the early Universe predict the formation of some fraction of stars with masses several hundred times the solar mass. No clear evidence of supernovae from such supermassive stars has, however, yet been found in the chemical compositions of Mil ...
... Abstract: Numerical simulations of structure formation in the early Universe predict the formation of some fraction of stars with masses several hundred times the solar mass. No clear evidence of supernovae from such supermassive stars has, however, yet been found in the chemical compositions of Mil ...
Notes for Class 7, March 2
... • This topic does NOT ask for a simple listing of all of the topics and activities (“laundry list”), and does not ask for an evaluation of me or the course (that’s for SET) or you. • The topic asks for “a” core concept and suggests a starting point for your analysis • Due 4/20. Note that we have not ...
... • This topic does NOT ask for a simple listing of all of the topics and activities (“laundry list”), and does not ask for an evaluation of me or the course (that’s for SET) or you. • The topic asks for “a” core concept and suggests a starting point for your analysis • Due 4/20. Note that we have not ...
Evidence for a signature of the galactic bar in the solar neighbourhood
... observed (Fig. 1). In order to analyse the connection between the observed asymmetry in the (u, v) plane and the perturbation effect of the bar on the stellar populations of the disc, it is useful to recall the orbital behaviour corresponding to the local velocities concerned. Detailed discussions o ...
... observed (Fig. 1). In order to analyse the connection between the observed asymmetry in the (u, v) plane and the perturbation effect of the bar on the stellar populations of the disc, it is useful to recall the orbital behaviour corresponding to the local velocities concerned. Detailed discussions o ...
ppt - Institute for Astronomy
... The separations of the above FUor pairs are so large that it would take several thousand years from a periastron passage to reach their present locations. FUor eruptions probably do not last that ...
... The separations of the above FUor pairs are so large that it would take several thousand years from a periastron passage to reach their present locations. FUor eruptions probably do not last that ...
A Human-Powered Orrery: Connecting Learners with the Night Sky*
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
Kepler File
... 3. He introduced physical causality into astronomy. His major work (Astronomia Nova) in which he describes his first and second laws is subtitled “a new astronomy based upn causation.” Before Kepler, astronomy had become an exercise in mathematical modeling of the most complicated kind including a w ...
... 3. He introduced physical causality into astronomy. His major work (Astronomia Nova) in which he describes his first and second laws is subtitled “a new astronomy based upn causation.” Before Kepler, astronomy had become an exercise in mathematical modeling of the most complicated kind including a w ...
The Little Star That Could - Challenger Learning Center
... d) The stars 7) The dwarf planet that is located past the planet Neptune is called: a) Ceres b) Pluto c) Earth d) Jupiter 8) The only planet in the solar system that we know supports life. a) Ceres b) Pluto c) Earth d) Jupiter 9) A natural body visible in the sky especially at night that gives off l ...
... d) The stars 7) The dwarf planet that is located past the planet Neptune is called: a) Ceres b) Pluto c) Earth d) Jupiter 8) The only planet in the solar system that we know supports life. a) Ceres b) Pluto c) Earth d) Jupiter 9) A natural body visible in the sky especially at night that gives off l ...
Formation of Giant Planets - Lunar and Planetary Institute
... retical arguments against the formation of Jupiter-mass objects via fragmentation (Bodenheimer et al., 2000a). The theory of giant planet formation that is favored by most researchers is the core nucleated accretion model, in which the planet’s initial phase of growth resembles that of a terrestrial ...
... retical arguments against the formation of Jupiter-mass objects via fragmentation (Bodenheimer et al., 2000a). The theory of giant planet formation that is favored by most researchers is the core nucleated accretion model, in which the planet’s initial phase of growth resembles that of a terrestrial ...
Stars and the Milky Way
... • we live in a galaxy called the Milky Way • the Milky Way is one of billions of galaxies in the universe • the Milky Way is made up of over 200 billion stars Other facts about the Milky Way • The Sun is just one of the stars in the Milky Way. • It is called the Milky Way because when astronomers lo ...
... • we live in a galaxy called the Milky Way • the Milky Way is one of billions of galaxies in the universe • the Milky Way is made up of over 200 billion stars Other facts about the Milky Way • The Sun is just one of the stars in the Milky Way. • It is called the Milky Way because when astronomers lo ...
Possible climates on terrestrial exoplanets
... As discussed in Section 2.2., because atmospheric escape is closely related to the stellar activity, it is strongly time dependent at early ages. The timescale on which the various species can be added to the atmosphere is thus critical in determining what is left in the matured atmosphere. Hence, w ...
... As discussed in Section 2.2., because atmospheric escape is closely related to the stellar activity, it is strongly time dependent at early ages. The timescale on which the various species can be added to the atmosphere is thus critical in determining what is left in the matured atmosphere. Hence, w ...
Lec2015_22
... Double-check model using Hydrogen Balmer line – surface gravity, T,… Compare to stars that bracket physical properties ...
... Double-check model using Hydrogen Balmer line – surface gravity, T,… Compare to stars that bracket physical properties ...
Document
... Venn & Lambert (2008) have argued that this may not be the case. Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted g ...
... Venn & Lambert (2008) have argued that this may not be the case. Peculiar stars such as post AGB stars and l Boo stars have iron abundances as low as [Fe/H] ~ –5. These are thought to be due to the separation of gas and dust beyond the stellar surface followed by an accretion of the dust-depleted g ...
Summary: Modes of Star Formation
... dense star-forming cores are involved. In fact, such a picture seems almost unavoidable, because if one imagines that accretion is the dominant process, then the gas being accreted by the stars in a forming cluster must be very clumpy and must contain many forming stars, while if one imagines that c ...
... dense star-forming cores are involved. In fact, such a picture seems almost unavoidable, because if one imagines that accretion is the dominant process, then the gas being accreted by the stars in a forming cluster must be very clumpy and must contain many forming stars, while if one imagines that c ...
Exploration of the Milky Way and Nearby galaxies
... peculiar abundance ratios, will provide useful constraints on the existence or fraction of very massive stars in the early universe (Karlsson et al. 2008). High resolution spectra for such studies can be obtained witth TMT/HROS. ...
... peculiar abundance ratios, will provide useful constraints on the existence or fraction of very massive stars in the early universe (Karlsson et al. 2008). High resolution spectra for such studies can be obtained witth TMT/HROS. ...
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 ...
The formation of the solar system
... look at the different stages of planet formation. Starting from dust grains, then considering pebble-sized objects to planetismals the current state of research is presented. This is followed by the final step in which planets form. Many of these young systems are part of a cluster of stars. There a ...
... look at the different stages of planet formation. Starting from dust grains, then considering pebble-sized objects to planetismals the current state of research is presented. This is followed by the final step in which planets form. Many of these young systems are part of a cluster of stars. There a ...
an Educator`s GuidE
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
... Until very recently, planets outside our own solar system existed only in our imaginations. Scientists had been hypothesizing about their existence for centuries, but they did not have the technology required for definitive proof. It was not until 1992 that astronomers Aleksander Wolszczan and Dale ...
Word doc - GDN - University of Gloucestershire
... if the Universe began with a hot Big Bang, then the Universe should be filled with electromagnetic radiation cooled from the early fireball to a temperature of around 10 degrees above absolute zero (~10°K). In subsequent years a large number of measurements of the Cosmic Microwave Background at diff ...
... if the Universe began with a hot Big Bang, then the Universe should be filled with electromagnetic radiation cooled from the early fireball to a temperature of around 10 degrees above absolute zero (~10°K). In subsequent years a large number of measurements of the Cosmic Microwave Background at diff ...
Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in orbit around a star or star system. Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals and circumstellar disks. The Sun together with its planetary system, which includes Earth, is known as the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems.A total of 1968 exoplanets (in 1248 planetary systems, including 490 multiple planetary systems) have been identified as of 1 October 2015.Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water.