Lecture 16
... Suppose the universe contained only lowmass stars. Would elements heavier than carbon exist? A. Yes, all stars create heavier elements than carbon when they become a supernova. B. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolificall ...
... Suppose the universe contained only lowmass stars. Would elements heavier than carbon exist? A. Yes, all stars create heavier elements than carbon when they become a supernova. B. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolificall ...
A Deeper Look at Faint H $\ alpha $ Emission in Nearby Dwarf
... top of the image (Figure 2, middle right); the potential emission is not captured by the 1σ contours due to the 4 pixel smoothing, but clearly may only be noise. The higher resolution of the MMTF image (PSF FWHM of 0.′′ 7 relative to 1.′′ 2; corresponding to 13 and 22 pc at 3.8 Mpc) shows that the f ...
... top of the image (Figure 2, middle right); the potential emission is not captured by the 1σ contours due to the 4 pixel smoothing, but clearly may only be noise. The higher resolution of the MMTF image (PSF FWHM of 0.′′ 7 relative to 1.′′ 2; corresponding to 13 and 22 pc at 3.8 Mpc) shows that the f ...
Beam Splitters A beam splitter is a device that`s used to divide an
... changes, the light may not travel the right distance through the coating to be in phase at the upper boundary. ...
... changes, the light may not travel the right distance through the coating to be in phase at the upper boundary. ...
Determination of bandwidth and beamwidth of a
... The acronym LASER stands for Light Amplification by Stimulated Emission of Radiation. In contrast to conventional light sources a laser is monochromatic and coherent over a long distance. These characteristics are usefull for many applications in science where e.g. constant beamwidths are demanded. ...
... The acronym LASER stands for Light Amplification by Stimulated Emission of Radiation. In contrast to conventional light sources a laser is monochromatic and coherent over a long distance. These characteristics are usefull for many applications in science where e.g. constant beamwidths are demanded. ...
Criss-Cross Puzzle
... Coma — The cloud of gas and dust that forms around a comet's nucleus. Comet — A “dirty snowball” consisting of ices, rocks, and dirt. Dust Tail — Forms when the solar wind separates dust from the coma, pushing it outward away from the Sun. Gas-Ion Tail — Forms when the solar wind separates gases fro ...
... Coma — The cloud of gas and dust that forms around a comet's nucleus. Comet — A “dirty snowball” consisting of ices, rocks, and dirt. Dust Tail — Forms when the solar wind separates dust from the coma, pushing it outward away from the Sun. Gas-Ion Tail — Forms when the solar wind separates gases fro ...
Optical spectroscopy techniques
... Pump and Probe beam configuration: Doppler-‐broadened shape can be eliminated ...
... Pump and Probe beam configuration: Doppler-‐broadened shape can be eliminated ...
Exoplanet Discoveries and the Fermi Paradox
... we have no evidence of them. The recent astronomical evidence for thousands of planets in other solar systems enhances the Fermi paradox between the increasing number of potentially habitable planets in the Galaxy and the lack of any evidence of extraterrestrial civilizations. This prompts a new loo ...
... we have no evidence of them. The recent astronomical evidence for thousands of planets in other solar systems enhances the Fermi paradox between the increasing number of potentially habitable planets in the Galaxy and the lack of any evidence of extraterrestrial civilizations. This prompts a new loo ...
39 Steps
... time to scan the larger image and possibly cause more bleaching. The optics or the scanning mirrors can introduce geometrical distortion that can result in discordance between the shape of the object and the image. The environment is important: vibration and stray electromagnetic fields can be cause ...
... time to scan the larger image and possibly cause more bleaching. The optics or the scanning mirrors can introduce geometrical distortion that can result in discordance between the shape of the object and the image. The environment is important: vibration and stray electromagnetic fields can be cause ...
Chapter 20: Stellar Evolution: The Death of Stars PowerPoint
... • UV radiation ionizes the expanding gas shell – This glows in what we see as a planetary nebula • Name given because they look somewhat like planets • No suggestion that they have, had, or will form planets ...
... • UV radiation ionizes the expanding gas shell – This glows in what we see as a planetary nebula • Name given because they look somewhat like planets • No suggestion that they have, had, or will form planets ...
eXtremely Fast Tr
... this, the most distant stars in the observable universe are moving away from us at a velocity approaching the speed of light. This has the effect of further diminishing the intensity of their light, as obsevered from Earth. http://www.curiouser.co.uk/paradoxes/olbers.htm ...
... this, the most distant stars in the observable universe are moving away from us at a velocity approaching the speed of light. This has the effect of further diminishing the intensity of their light, as obsevered from Earth. http://www.curiouser.co.uk/paradoxes/olbers.htm ...
Orion-pr-2009 - Astrophysics Research Institute
... does not see is an enormous cloud of molecules and dust particles that hide a vast region where young stars are currently being born. On the sky, the region – known to astronomers as the Orion Molecular Cloud -- is more than 20 times the angular size of the full moon, spanning from far above the hun ...
... does not see is an enormous cloud of molecules and dust particles that hide a vast region where young stars are currently being born. On the sky, the region – known to astronomers as the Orion Molecular Cloud -- is more than 20 times the angular size of the full moon, spanning from far above the hun ...
7.1.3 Optimizing Light Confinement and Gain in Laser Diodes
... In order to have high efficiency and a single mode, we must maximize the density of photons, u(ν) and the gain g(ν) coefficient in the same active area of the device. This is not a condition automatically met, quite the opposite. The gain coefficient is mostly a function of the positions of the qua ...
... In order to have high efficiency and a single mode, we must maximize the density of photons, u(ν) and the gain g(ν) coefficient in the same active area of the device. This is not a condition automatically met, quite the opposite. The gain coefficient is mostly a function of the positions of the qua ...
AST 150: Radioactive Dating Game Activity
... Will an extraterrestrial’s signals overlap with the lifespan of the receiving civilization? Extraterrestrials that sent signals a million years ago from a world a million light years away would still overlap ...
... Will an extraterrestrial’s signals overlap with the lifespan of the receiving civilization? Extraterrestrials that sent signals a million years ago from a world a million light years away would still overlap ...
God and Cosmology - Evidence for Christianity
... should reiterate my health warning at this stage. It is the one I much prefer, however, even though in our present state of knowledge any such preference can be no more than a hunch” [emphasis added]. ...
... should reiterate my health warning at this stage. It is the one I much prefer, however, even though in our present state of knowledge any such preference can be no more than a hunch” [emphasis added]. ...
Document
... towards the centre of clusters (Solanes+ 2001) • Possible Mechanisms: • Starvation (Larson+ 1980) • Ram pressure stripping (Gunn & Gott 1972) HI in M81 Group of Galaxies (Yun+ 1994) ...
... towards the centre of clusters (Solanes+ 2001) • Possible Mechanisms: • Starvation (Larson+ 1980) • Ram pressure stripping (Gunn & Gott 1972) HI in M81 Group of Galaxies (Yun+ 1994) ...
Light-More-interference
... the air. The rainbow is the result of light undergoing dispersion in these tiny drops of water suspended in the atmosphere. The water drops act like prisms. Light enters near the top of the drop on one side, is reflected (total internal reflection), which means it undergoes two refractions. (Refract ...
... the air. The rainbow is the result of light undergoing dispersion in these tiny drops of water suspended in the atmosphere. The water drops act like prisms. Light enters near the top of the drop on one side, is reflected (total internal reflection), which means it undergoes two refractions. (Refract ...
Stellar Winds and Supernova Remnants: Interaction with the ISM
... V-band image of IRC+10216 showing shell-like structures in the circumstellar envelope (90''x 90'') Mauron & Huggins (2010) ...
... V-band image of IRC+10216 showing shell-like structures in the circumstellar envelope (90''x 90'') Mauron & Huggins (2010) ...
The Sky Tonight - Northern Stars Planetarium
... space. It’s the result of the death of an average star (like the Sun). The nebulosity you see is the outer layers of the star that have been blown out into space. Planetary nebula actually have no relationship to planets. They’re called planetary because of their appearance only, which led early ast ...
... space. It’s the result of the death of an average star (like the Sun). The nebulosity you see is the outer layers of the star that have been blown out into space. Planetary nebula actually have no relationship to planets. They’re called planetary because of their appearance only, which led early ast ...
Click here to the PowerPoint
... • incredibly high pressure (gravity) and • incredibly high temperature (friction) – this causes NUCLEAR FUSION MAIN SEQUENCE STAR: A fully formed star (like our Sun), where nuclear fusion is taking place, and hydrogen nuclei are forced together to form ...
... • incredibly high pressure (gravity) and • incredibly high temperature (friction) – this causes NUCLEAR FUSION MAIN SEQUENCE STAR: A fully formed star (like our Sun), where nuclear fusion is taking place, and hydrogen nuclei are forced together to form ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.