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Stellar Populations of Galaxies- 2 Lectures H
... The limit of the Balmer series and the blending of the high-order Balmer lines produces a discontinuity of the spectrum blueward of 3650°A. (the Balmer break) –more important in young populations, The break amplitude and position is a proxy for the age of the stellar population The UV continuum flux ...
... The limit of the Balmer series and the blending of the high-order Balmer lines produces a discontinuity of the spectrum blueward of 3650°A. (the Balmer break) –more important in young populations, The break amplitude and position is a proxy for the age of the stellar population The UV continuum flux ...
Detecting the glint of starlight on the oceans of distant planets
... inner working radius 4λ/D ∼ 0.057 for an 8-meter telescope observing at λ = 550 nm. The phase range for planet detection is somewhat wider for less-inclined orbits, but narrower for planets closer to their stars. According to Fig. 2, it will be impossible to detect thin-crescent planets (fA < 0.25 ...
... inner working radius 4λ/D ∼ 0.057 for an 8-meter telescope observing at λ = 550 nm. The phase range for planet detection is somewhat wider for less-inclined orbits, but narrower for planets closer to their stars. According to Fig. 2, it will be impossible to detect thin-crescent planets (fA < 0.25 ...
Giant Planets at Small Orbital Distances
... MJ \olivine" planet (open triangles), all at a variety of orbital distances (indicated by the arrows). Also shown are the Hayashi (1961) track (boundary of the dark shaded region), the Hayashi exclusion zone (the dark shaded region itself), the Roche exclusion zone (the lightly shaded region), and t ...
... MJ \olivine" planet (open triangles), all at a variety of orbital distances (indicated by the arrows). Also shown are the Hayashi (1961) track (boundary of the dark shaded region), the Hayashi exclusion zone (the dark shaded region itself), the Roche exclusion zone (the lightly shaded region), and t ...
constellation.
... c. How are astronomical units and light years use to measure the distances between the Sun, stars, and Earth. (Your project should include: how many kilometers there are in 1 AU and 1 light year along with some interesting distances in space using these measurements, such as, distance from the Sun t ...
... c. How are astronomical units and light years use to measure the distances between the Sun, stars, and Earth. (Your project should include: how many kilometers there are in 1 AU and 1 light year along with some interesting distances in space using these measurements, such as, distance from the Sun t ...
Lab 2: An OpenGL Solar System
... astronomical database. Some of the constellations are highlighted. The camera moves smoothly and shows the most important features of the application (sun/planets/moons, animated orbits, stars, constellations). Note that your task is not to create an accurate planetarium tool! 4 In the example above ...
... astronomical database. Some of the constellations are highlighted. The camera moves smoothly and shows the most important features of the application (sun/planets/moons, animated orbits, stars, constellations). Note that your task is not to create an accurate planetarium tool! 4 In the example above ...
Exam 2
... they explode, creating an expanding spherical cloud of gas. The small, hot remnant of the central star heats the gas, causing it to glow. For a few thousand years, the dying star is surrounded by a beautiful gleaming cloud known as a planetary nebula. Planetary nebulae have a spectacular array of sh ...
... they explode, creating an expanding spherical cloud of gas. The small, hot remnant of the central star heats the gas, causing it to glow. For a few thousand years, the dying star is surrounded by a beautiful gleaming cloud known as a planetary nebula. Planetary nebulae have a spectacular array of sh ...
L8 Condensation
... The most primitive sub-class are so called CI-chondrites. In their appearance, these mostly small, black, and very friable rocks remind more of a piece of tar or charcoal than of a stone. They contain a large fraction of water (bound in silicates) of 17-22%. The iron content (in form of iron oxides) ...
... The most primitive sub-class are so called CI-chondrites. In their appearance, these mostly small, black, and very friable rocks remind more of a piece of tar or charcoal than of a stone. They contain a large fraction of water (bound in silicates) of 17-22%. The iron content (in form of iron oxides) ...
ASTR 330: The Solar System
... • One of the great problems of 18th and 19th century geology was explain the shape of the Earth’s surface terrain. The prevailing view was that topology had all originated catastrophically, and that the Earth was relatively young (thousands of years). • A different view was taken by James Hutton (17 ...
... • One of the great problems of 18th and 19th century geology was explain the shape of the Earth’s surface terrain. The prevailing view was that topology had all originated catastrophically, and that the Earth was relatively young (thousands of years). • A different view was taken by James Hutton (17 ...
charts_set_9
... - billions of years old Clusters are crucial for stellar evolution studies because: 1) All stars in a cluster formed at about same time (so all have same age) 2) All stars are at about the same distance 3) All stars have same chemical composition ...
... - billions of years old Clusters are crucial for stellar evolution studies because: 1) All stars in a cluster formed at about same time (so all have same age) 2) All stars are at about the same distance 3) All stars have same chemical composition ...
ppt document
... and global warming) are still quite uncertain and do not agree all that well with all the data. However, we are making good progress in these difficult areas. Since science is based on experiment, even “untrue” theories can still be useful in making predictions and hence in developing technologies. ...
... and global warming) are still quite uncertain and do not agree all that well with all the data. However, we are making good progress in these difficult areas. Since science is based on experiment, even “untrue” theories can still be useful in making predictions and hence in developing technologies. ...
Why there are apparently so few debris disks among post
... core of the order of ~15 Earth masses, the surrounding gas is captured quiet rapidly to form a giant planet. The giant planet and disk interaction produces an inward migration of the planet. ...
... core of the order of ~15 Earth masses, the surrounding gas is captured quiet rapidly to form a giant planet. The giant planet and disk interaction produces an inward migration of the planet. ...
L87 THE b PICTORIS MOVING GROUP B. ZUCkERMAN AND
... Based on averaged proper motions from PPM and Hipparcos catalogs. UVW are positive in the directions of the Galactic center, Galactic rotation, and the north Galactic pole. Errors in UVW are all smaller than 2.0 km s!1 in all components except for HIP 88399, 88726, and 92024, where poor radial veloc ...
... Based on averaged proper motions from PPM and Hipparcos catalogs. UVW are positive in the directions of the Galactic center, Galactic rotation, and the north Galactic pole. Errors in UVW are all smaller than 2.0 km s!1 in all components except for HIP 88399, 88726, and 92024, where poor radial veloc ...
Correct answers shown in boldface. Be sure to write your name and
... d. is almost all concentrated in its giant central galaxies e. is mostly in the form of very hot gas and dark matter 32. Why did astronomers in the 19th century believe that the solar system was close to the center of the Milky Way? a. we are close to the center b. they did not have photographic pla ...
... d. is almost all concentrated in its giant central galaxies e. is mostly in the form of very hot gas and dark matter 32. Why did astronomers in the 19th century believe that the solar system was close to the center of the Milky Way? a. we are close to the center b. they did not have photographic pla ...
Interstellar medium, birth and life of stars
... Protostars and Pre–Main-Sequence Stars The most massive pre–main-sequence stars take the shortest time to become main-sequence stars (O and B stars). In the final stages of pre–main-sequence contraction, when hydrogen fusion is about to begin in the core, the pre–main-sequence star may undergo ...
... Protostars and Pre–Main-Sequence Stars The most massive pre–main-sequence stars take the shortest time to become main-sequence stars (O and B stars). In the final stages of pre–main-sequence contraction, when hydrogen fusion is about to begin in the core, the pre–main-sequence star may undergo ...
The Formation of Planetary Systems
... with these gases are microscopic dust grains made up of heavier elements—carbon, nitrogen, silicon, and iron. The dust will play a crucial role in the formation of planets. Some external influence, such as the passage of another interstellar cloud or perhaps the explosion of a nearby star, starts th ...
... with these gases are microscopic dust grains made up of heavier elements—carbon, nitrogen, silicon, and iron. The dust will play a crucial role in the formation of planets. Some external influence, such as the passage of another interstellar cloud or perhaps the explosion of a nearby star, starts th ...
- EPJ Web of Conferences
... The trend in mean metallicity with system luminosity is also interesting, and full of information. The trend establishes that the present-day system luminosity is correlated tightly with system properties when the stars were forming, and the self-enrichment was being established. That was at very ea ...
... The trend in mean metallicity with system luminosity is also interesting, and full of information. The trend establishes that the present-day system luminosity is correlated tightly with system properties when the stars were forming, and the self-enrichment was being established. That was at very ea ...
iaf2001_paper (doc - 1.8 MB)
... with an eclipse detection for a planet slightly bigger than the Earth. For less bright stars (magnitude 15.5 and over), only giant gaseous planets will be detected. ...
... with an eclipse detection for a planet slightly bigger than the Earth. For less bright stars (magnitude 15.5 and over), only giant gaseous planets will be detected. ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... In the present paper we shall first make some comments in support of the existence of young stars below the main sequence; next we shall try to explain this peculiarity as the result of the formation of planetary systems around contracting stars. Finally it will be seen how this hypothesis can expl ...
... In the present paper we shall first make some comments in support of the existence of young stars below the main sequence; next we shall try to explain this peculiarity as the result of the formation of planetary systems around contracting stars. Finally it will be seen how this hypothesis can expl ...
ASTRONOMY 113 Laboratory Kepler`s 3rd Law and the Mass of Sgr A
... and it travels at 99% of the speed of light. This jet is more powerful than all the stars in the Milky Way combined – 30 billion times more powerful than our sun. It can be traced back all the way to the central object of Virgo, where it is produced in a volume about as small as Saturn’s orbit arou ...
... and it travels at 99% of the speed of light. This jet is more powerful than all the stars in the Milky Way combined – 30 billion times more powerful than our sun. It can be traced back all the way to the central object of Virgo, where it is produced in a volume about as small as Saturn’s orbit arou ...
The Anglo-Australian Planet Search – XXI. A Gas-Giant
... 8.5 m s−1 , which is substantially higher (by almost a factor of two) than would be expected based on measurement precision (the median value of the internal uncertainty produced by our iodine velocity fitting is 1.9 m s−1 ) and stellar jitter (3.0 m s−1 ). Preliminary analysis of these velocities i ...
... 8.5 m s−1 , which is substantially higher (by almost a factor of two) than would be expected based on measurement precision (the median value of the internal uncertainty produced by our iodine velocity fitting is 1.9 m s−1 ) and stellar jitter (3.0 m s−1 ). Preliminary analysis of these velocities i ...
Notes (PowerPoint)
... • Normally counter-clockwise from above north pole • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
... • Normally counter-clockwise from above north pole • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
Investigate Planets, Stars, Galaxies, and the Universe
... and vast spaces. The observable universe contains billions of galaxies. These galaxies range in size from thousands of times smaller to a hundred times larger than our own Milky Way Galaxy, which itself contains more than 100 billion stars. Like our Sun, many other stars have planetary systems in or ...
... and vast spaces. The observable universe contains billions of galaxies. These galaxies range in size from thousands of times smaller to a hundred times larger than our own Milky Way Galaxy, which itself contains more than 100 billion stars. Like our Sun, many other stars have planetary systems in or ...
18th Cambridge Workshop on Cool Stars, Stellar Systems, and the... Proceedings of Lowell Observatory (9-13 June 2014)
... momentum loss rate, see e.g. Section 10. on Victor Réville’s talk). It is worth noting that a better understanding of stellar dynamos is of prime interest not only for space weather issues but also to consistently address key issues of stellar physics such as the formation of low-mass stars and the ...
... momentum loss rate, see e.g. Section 10. on Victor Réville’s talk). It is worth noting that a better understanding of stellar dynamos is of prime interest not only for space weather issues but also to consistently address key issues of stellar physics such as the formation of low-mass stars and the ...
Planetary system
![](https://commons.wikimedia.org/wiki/Special:FilePath/Artist_Concept_Planetary_System.jpg?width=300)
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.