Eyeing the retina nebula
... Planetary nebulae are the multicolored remnants of dead stars. When a star about the size of the Sun runs out of nuclear fuel, the core collapses to form a much smaller dwarf star and the outer layers are ejected to form an expanding cloud of dust and gas. Intense radiation from the collapsed star i ...
... Planetary nebulae are the multicolored remnants of dead stars. When a star about the size of the Sun runs out of nuclear fuel, the core collapses to form a much smaller dwarf star and the outer layers are ejected to form an expanding cloud of dust and gas. Intense radiation from the collapsed star i ...
Slide 1
... accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe homogeneous? God's Bubble Bath: Galaxy superclusters seem to from in bubble structures and filaments with Voids 100-500 ...
... accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe homogeneous? God's Bubble Bath: Galaxy superclusters seem to from in bubble structures and filaments with Voids 100-500 ...
presentation source
... “[Even though T Tauri associations could all have similar colors implying young age by coincidence], it is of course, tempting to search for a connection between the T Tauri stars and Bok’s ‘globules,’ but we must admit that at present there is no evidence of any objects intermediate between the two ...
... “[Even though T Tauri associations could all have similar colors implying young age by coincidence], it is of course, tempting to search for a connection between the T Tauri stars and Bok’s ‘globules,’ but we must admit that at present there is no evidence of any objects intermediate between the two ...
Lecture 43
... Shock waves within the solar nebula may be the main cause, but some may have formed from collisions. The rapid cooling experienced by chondrules suggests ambient temperatures were low, perhaps 300 K. Chondrules make up much of the mass of chondrites so a very significant fraction of the matter in th ...
... Shock waves within the solar nebula may be the main cause, but some may have formed from collisions. The rapid cooling experienced by chondrules suggests ambient temperatures were low, perhaps 300 K. Chondrules make up much of the mass of chondrites so a very significant fraction of the matter in th ...
Animated Planets PowerPoint Presentation
... and tail. Comets are composed of rock, dust, ice and frozen gases such as carbon monoxide, carbon dioxide, methane, and ammonia. Comets contain a variety of organic compounds, some of these are methanol, hydrogen cyanide, formaldehyde, ethanol, and ethane. Complex molecules such as long-chain hydroc ...
... and tail. Comets are composed of rock, dust, ice and frozen gases such as carbon monoxide, carbon dioxide, methane, and ammonia. Comets contain a variety of organic compounds, some of these are methanol, hydrogen cyanide, formaldehyde, ethanol, and ethane. Complex molecules such as long-chain hydroc ...
1 - ESO
... • For a variety of reasons, total disk mass is best measured at submillimeter wavelengths. But tau, which is a measure of far-IR excess emission, is much easier to measure and has been determined for an order of magnitude more stars than has dust mass. ...
... • For a variety of reasons, total disk mass is best measured at submillimeter wavelengths. But tau, which is a measure of far-IR excess emission, is much easier to measure and has been determined for an order of magnitude more stars than has dust mass. ...
Powerpoint
... when part of a dust cloud begins to contract under its own gravitational force (remember, stars are ~1020 x denser than a molecular cloud). As it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. Probably new molecular clouds form continually out of less dense ...
... when part of a dust cloud begins to contract under its own gravitational force (remember, stars are ~1020 x denser than a molecular cloud). As it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. Probably new molecular clouds form continually out of less dense ...
M - UC Berkeley Astronomy w
... SEDs from optical through mm wavelengths Observations of the gas; NIR ro-vibrational transitions of molecules mm rotational transitions of of molecules • The dust is easier and more frequently observed. • The gas and dust are not always co-spatial. • The focus is now on the gas. • SPITZER IRS adds a ...
... SEDs from optical through mm wavelengths Observations of the gas; NIR ro-vibrational transitions of molecules mm rotational transitions of of molecules • The dust is easier and more frequently observed. • The gas and dust are not always co-spatial. • The focus is now on the gas. • SPITZER IRS adds a ...
Can we account for the dust
... Mid- and far-IR emission of galaxies ◦ Thermal emission from dust grains ...
... Mid- and far-IR emission of galaxies ◦ Thermal emission from dust grains ...
Astro 10: Introductory Astronomy
... • The “Fast” scenario: eddys form, merge. Eddys include not just dust (which is only ~2% of total mass recall), but hydrogen and helium as well (much more mass here). The growth rate would be much faster as gravity would kick in right away for such massive objects. ...
... • The “Fast” scenario: eddys form, merge. Eddys include not just dust (which is only ~2% of total mass recall), but hydrogen and helium as well (much more mass here). The growth rate would be much faster as gravity would kick in right away for such massive objects. ...
Fulltext PDF
... interstellar grains is difficult to ascertain. The best estimates come from an analysis of the way in which the grains scatter light. The indications are that the particles of interstellar dust are elongated particles of frozen water, carbon or silicates. Other constituents are probably also present ...
... interstellar grains is difficult to ascertain. The best estimates come from an analysis of the way in which the grains scatter light. The indications are that the particles of interstellar dust are elongated particles of frozen water, carbon or silicates. Other constituents are probably also present ...
Comets, Meteors, and Meteoroids
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
Pollution Control - No Brain Too Small
... Precipitators function by electrostatically charging the dust particles in the gas stream. The charged particles are then attracted to and deposited on plates or other collection devices. When enough dust has accumulated, the collectors are shaken to dislodge the dust, causing it to fall with the fo ...
... Precipitators function by electrostatically charging the dust particles in the gas stream. The charged particles are then attracted to and deposited on plates or other collection devices. When enough dust has accumulated, the collectors are shaken to dislodge the dust, causing it to fall with the fo ...
The Dynamics of Small Bodies Dissipative and Radiation Forces
... the radiation pressure, the second two terms are the PR drag. • The direction of the force depends on the particle’s direction of motion. For a circular orbit it is opposite to the particle’s direction of motion. The particle is slowly slowed down. • PR drag is a relativistic effect and so is propor ...
... the radiation pressure, the second two terms are the PR drag. • The direction of the force depends on the particle’s direction of motion. For a circular orbit it is opposite to the particle’s direction of motion. The particle is slowly slowed down. • PR drag is a relativistic effect and so is propor ...
Star Formation
... • Dark nebula are usually molecular clouds • Molecular clouds are relatively dense and are very cold, often only 10 K. • Giant molecular clouds can contain as much as 104 solar masses (M) of gas and be 10 light years across. • Molecular clouds are the primary sites for star formation. ...
... • Dark nebula are usually molecular clouds • Molecular clouds are relatively dense and are very cold, often only 10 K. • Giant molecular clouds can contain as much as 104 solar masses (M) of gas and be 10 light years across. • Molecular clouds are the primary sites for star formation. ...
So, what`s the problem for high
... Clump mass function looks like the Initial Mass Function--Maybe we see only the single brightest star. Fig. 2. The mass spectrum of IRAS 19410+2336. The clumpmass bins are [1.7(3),4], [4,6], [6,8], [8,10], and [10,25] M, and the axes are in logarithmic units. The error bars represent the standard de ...
... Clump mass function looks like the Initial Mass Function--Maybe we see only the single brightest star. Fig. 2. The mass spectrum of IRAS 19410+2336. The clumpmass bins are [1.7(3),4], [4,6], [6,8], [8,10], and [10,25] M, and the axes are in logarithmic units. The error bars represent the standard de ...
PHYS3380_102615_bw
... We have observed disks around other stars. These could be new planetary systems in formation. ...
... We have observed disks around other stars. These could be new planetary systems in formation. ...
Determining the Origin of Inner Planetary System Debris Orbiting the
... of the stellar system, and tloss is the timescale of the dominant dust removal mechanism operating in the disk. The value used for tag e typically should be the best measured stellar age available, as in the case of ζ Leporis (tag e = 300 Myr; Chen & Jura 2001). However, in the case of young stars w ...
... of the stellar system, and tloss is the timescale of the dominant dust removal mechanism operating in the disk. The value used for tag e typically should be the best measured stellar age available, as in the case of ζ Leporis (tag e = 300 Myr; Chen & Jura 2001). However, in the case of young stars w ...
26.Meikle.Supernova_2002hh
... ejecta. Supernovae are suspected to be a major source of dust in the universe and the presence of new dust in SN 2002hh is expected to be observed at a later stage. This is only the second time for which a spectrum has been obtained of a supernova in 2.9-4.1 micron range (the other was SN 1987A whic ...
... ejecta. Supernovae are suspected to be a major source of dust in the universe and the presence of new dust in SN 2002hh is expected to be observed at a later stage. This is only the second time for which a spectrum has been obtained of a supernova in 2.9-4.1 micron range (the other was SN 1987A whic ...
Outline2a
... Dust and Young Stellar Objects Just like in the Earth’s atmosphere, the longer wavelength light better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
... Dust and Young Stellar Objects Just like in the Earth’s atmosphere, the longer wavelength light better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
The Turbulent Birth of Stars and Planets - Max-Planck
... or G011 for short. Previous observations had shown that G011 contains a number of newly born stars, making it an ideal target for studying the early phases of star formation. An ideal target, that is, for observations in the infrared: In visible light, clouds like this are completely opaque, showing ...
... or G011 for short. Previous observations had shown that G011 contains a number of newly born stars, making it an ideal target for studying the early phases of star formation. An ideal target, that is, for observations in the infrared: In visible light, clouds like this are completely opaque, showing ...
The Interstellar Medium
... “Interstellar Matter” (ISM), consists of gas, high-energy particles (Cosmic Rays), solid particles (dust) and radiation field. Magnetic fields permeate the interstellar gas, and the conductivity of the gas is large enough to consider the magnetic field to be frozen into the gas. Motion of the gas dr ...
... “Interstellar Matter” (ISM), consists of gas, high-energy particles (Cosmic Rays), solid particles (dust) and radiation field. Magnetic fields permeate the interstellar gas, and the conductivity of the gas is large enough to consider the magnetic field to be frozen into the gas. Motion of the gas dr ...
Cosmic dust
Cosmic dust is dust which exists in space. It is for the most part a type of small dust particles which are a few molecules to 0.1 µm in size. A smaller fraction of all dust in space consists of larger refractory minerals that condensed as matter left the stars. It is called ""stardust"" and is included in a separate section below. The dust density in the local interstellar medium of the Local Bubble is approximately 10−6 × dust grain/m3 with each grain having a mass of approximately 10−17 kg.Cosmic dust can be further distinguished by its astronomical location: intergalactic dust, interstellar dust, interplanetary dust (such as in the zodiacal cloud) and circumplanetary dust (such as in a planetary ring). In the Solar System, interplanetary dust causes the zodiacal light. Sources of Solar System dust include comet dust, asteroidal dust, dust from the Kuiper belt, and interstellar dust passing through the Solar System. The terminology has no specific application for describing materials found on the planet Earth except for dust that has demonstrably fallen to Earth. By one estimate, as much as 40,000 tons of cosmic dust reaches the Earth's surface every year. In October 2011, scientists reported that cosmic dust contains complex organic matter (""amorphous organic solids with a mixed aromatic–aliphatic structure"") that could be created naturally, and rapidly, by stars.On August 14, 2014, scientists announced the collection of possible interstellar dust particles from the Stardust spacecraft since returning to Earth in 2006.