Building large telescopes. I- Refractors.
... 1893 being displayed at the Columbia Exhibition in Chicago that same year. The 40-inch refractor (19.3 m focal length) went into operation only in 1897 after the foundation of the Yerkes Observatory in 1895. This refractor is still the largest in the world today. The combined weight of the two compo ...
... 1893 being displayed at the Columbia Exhibition in Chicago that same year. The 40-inch refractor (19.3 m focal length) went into operation only in 1897 after the foundation of the Yerkes Observatory in 1895. This refractor is still the largest in the world today. The combined weight of the two compo ...
Astronomy Astrophysics Circumstellar emission in Be/X-ray binaries of the Magellanic
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
TAL
... alignment to GR axis using A-Scope. “Wall-eye” of PMs and other system flexures need to be quantified and checked against available correction ranges of optical elements. Again, the A-Scope set-up for LBC alignment can give some useful measurements of that. AGW support. FPIA sensitivity to focus and ...
... alignment to GR axis using A-Scope. “Wall-eye” of PMs and other system flexures need to be quantified and checked against available correction ranges of optical elements. Again, the A-Scope set-up for LBC alignment can give some useful measurements of that. AGW support. FPIA sensitivity to focus and ...
Course Materials - Weber State University
... FACULTY! what caused the seasons. Clearly, this would not be interesting if they all got it right. In fact, nearly everyone got it wrong. This has led to consternation and dismay in the scientific community. Myself, I wonder how much of that was just due to the fact that people hadn't thought about ...
... FACULTY! what caused the seasons. Clearly, this would not be interesting if they all got it right. In fact, nearly everyone got it wrong. This has led to consternation and dismay in the scientific community. Myself, I wonder how much of that was just due to the fact that people hadn't thought about ...
2 Galaxy morphology and classification
... The spheroid is the smooth elliptical distribution of stars found in elliptical galaxies. It is composed primarily of an old, metal-poor, population of stars typically having ages „ 12 Gyr or more. The spheroid is thought to be among the first stellar components to form. The stellar halo is a di↵use ...
... The spheroid is the smooth elliptical distribution of stars found in elliptical galaxies. It is composed primarily of an old, metal-poor, population of stars typically having ages „ 12 Gyr or more. The spheroid is thought to be among the first stellar components to form. The stellar halo is a di↵use ...
2MASS Data Mining and the M, L, and T Dwarf Archives
... or spectral classification system. 2MASS has covered the entire sky relatively deeply, so almost all L and T dwarfs – even if discovered by other surveys – will be present in the 2MASS images and catalogs. Furthermore, the 2MASS team has acquired optical spectra of many of these same objects on a un ...
... or spectral classification system. 2MASS has covered the entire sky relatively deeply, so almost all L and T dwarfs – even if discovered by other surveys – will be present in the 2MASS images and catalogs. Furthermore, the 2MASS team has acquired optical spectra of many of these same objects on a un ...
Galaxy Powerpoint Notes
... Inside of galaxies Ever wondered what was inside a galaxy? Well look no farther, because you’re in one! Unfortunately, galaxies are massive, and we can’t see as much as we wish, and that is why with the assistance of telescopes, astronomers have been able to identify certain things in space. Our gal ...
... Inside of galaxies Ever wondered what was inside a galaxy? Well look no farther, because you’re in one! Unfortunately, galaxies are massive, and we can’t see as much as we wish, and that is why with the assistance of telescopes, astronomers have been able to identify certain things in space. Our gal ...
The ALMA Universe - ALMA Observatory
... (“inhabitants of the territory”), an indigenous people who speak the Kunza language, and who originally dedicated themselves to the breeding of llamas and alpacas. They protected their ...
... (“inhabitants of the territory”), an indigenous people who speak the Kunza language, and who originally dedicated themselves to the breeding of llamas and alpacas. They protected their ...
IRAM Annual Report 2014
... profited from the French LABEX program FOCUS. The wide field of view of NIKA-2 requires important upgrades in the 30-meter telescope Nasmyth optics. During 2014, these upgrades have been thoroughly prepared with work at the telescope foreseen for spring 2015. The precursor visiting instruments NIKA- ...
... profited from the French LABEX program FOCUS. The wide field of view of NIKA-2 requires important upgrades in the 30-meter telescope Nasmyth optics. During 2014, these upgrades have been thoroughly prepared with work at the telescope foreseen for spring 2015. The precursor visiting instruments NIKA- ...
Prospects for Viewing Comet ISON
... Uthe's house, off Youker Road with my 11” Dob to spot it. It was, even then, very faint. I had to use averted vision to spot it at all. It was a very faint smudge. A complication factor was, since it hung near the ecliptic, near Mars actually, It was in the midst of zodiacal light which is best seen ...
... Uthe's house, off Youker Road with my 11” Dob to spot it. It was, even then, very faint. I had to use averted vision to spot it at all. It was a very faint smudge. A complication factor was, since it hung near the ecliptic, near Mars actually, It was in the midst of zodiacal light which is best seen ...
Potential for Life on the Terrestrial Planets
... close-in planets). But exoplanets which are discovered by transits can be re-observed by the Doppler method so that their mass can also be determined if the precision is above the current signal threshold. The discovery of CoRoT-7b, the first small rocky exoplanet with measured radius and mass (Lége ...
... close-in planets). But exoplanets which are discovered by transits can be re-observed by the Doppler method so that their mass can also be determined if the precision is above the current signal threshold. The discovery of CoRoT-7b, the first small rocky exoplanet with measured radius and mass (Lége ...
スライド タイトルなし - X-ray Astronomy Group at ISAS
... Astro-E’s Instruments Astro-E carries five X-Ray Telescopes (XRTs). These telescope modules provide the soft X-ray images on the focal-plane instruments. One telescope module (XRT-S) feeds the X-ray Spectrometer (XRS); the other modules (XRT-I) have X-ray Imaging Spectrometer (XIS) units at their f ...
... Astro-E’s Instruments Astro-E carries five X-Ray Telescopes (XRTs). These telescope modules provide the soft X-ray images on the focal-plane instruments. One telescope module (XRT-S) feeds the X-ray Spectrometer (XRS); the other modules (XRT-I) have X-ray Imaging Spectrometer (XIS) units at their f ...
PPT
... • How are the lives of galaxies connected with the history of the universe? • What are the three major types of galaxies? • How are galaxies grouped together? Recall: The Sun is only one star among well over 100 billion stars in our own galaxy, the Milky Way, which has the form of a highly flattened ...
... • How are the lives of galaxies connected with the history of the universe? • What are the three major types of galaxies? • How are galaxies grouped together? Recall: The Sun is only one star among well over 100 billion stars in our own galaxy, the Milky Way, which has the form of a highly flattened ...
Spectroscopy Applications - Astrophysics and
... Moving one step closer to finding the fingerprints of life in a habitable planet beyond the solar system, astronomers have for the first time detected carbon dioxide in the atmosphere of a planet that orbits a star other than the sun Fall 2008 ...
... Moving one step closer to finding the fingerprints of life in a habitable planet beyond the solar system, astronomers have for the first time detected carbon dioxide in the atmosphere of a planet that orbits a star other than the sun Fall 2008 ...
History of Astrophotography Timeline
... 1924- Edwin Hubble (1889-1953), using the 2.54 m Hooker Telescope, was able to identify Cepheid variables in the Andromeda galaxy and estimates it’s distance (800 000 light years). Hubble changed astronomers' understanding of the nature of the universe by demonstrating the existence of other galaxie ...
... 1924- Edwin Hubble (1889-1953), using the 2.54 m Hooker Telescope, was able to identify Cepheid variables in the Andromeda galaxy and estimates it’s distance (800 000 light years). Hubble changed astronomers' understanding of the nature of the universe by demonstrating the existence of other galaxie ...
Atmospheric Abundances of Light Elements in the F
... metals were measured using an IRAF routine splot We literature. When reliable data were not available, solar also measured the Fel lines in order to utilize them for gf values were empirically deduced from the equivalent widths measured on the Solar Flux Atlas from 296 to checking the result of abun ...
... metals were measured using an IRAF routine splot We literature. When reliable data were not available, solar also measured the Fel lines in order to utilize them for gf values were empirically deduced from the equivalent widths measured on the Solar Flux Atlas from 296 to checking the result of abun ...
Spectropolarimetry of the massive post
... which the photospheric flux in the optical levelled off. As the photometric changes are mostly probed in the red, they do not trace high stellar temperatures sensitively. And so, it is not obvious whether the star has halted its increase in temperature or not. For HD 179821 we find no polarization e ...
... which the photospheric flux in the optical levelled off. As the photometric changes are mostly probed in the red, they do not trace high stellar temperatures sensitively. And so, it is not obvious whether the star has halted its increase in temperature or not. For HD 179821 we find no polarization e ...
A Recommendation - Amateur Astronomers, Inc.
... Once there were enough observations, an orbit was calculated. The calculations project that the comet originated, not in the relatively nearby Kuiper Belt (the region just beyond the orbit of Neptune that is home to icy objects such as Makemake, Eris, and Pluto as well as a large number of potential ...
... Once there were enough observations, an orbit was calculated. The calculations project that the comet originated, not in the relatively nearby Kuiper Belt (the region just beyond the orbit of Neptune that is home to icy objects such as Makemake, Eris, and Pluto as well as a large number of potential ...
Galaxies * Island universes
... Collisions between galaxies produce irregulars which settle into ellipticals More massive ellipticals have broader spectral lines – this is how we measure their mass S0’s formed in clusters of galaxies, by ram pressure stripping their gas out, shutting off later star formation Active galaxies: all g ...
... Collisions between galaxies produce irregulars which settle into ellipticals More massive ellipticals have broader spectral lines – this is how we measure their mass S0’s formed in clusters of galaxies, by ram pressure stripping their gas out, shutting off later star formation Active galaxies: all g ...
dew/frost prevention
... what is dew? Dew is caused by moisture in air and temperature differentials. Warm air can hold more moisture; cold air less. The measurement of the water-to-air ratio is relative humidity (RH). When moist warm air cools to the dew point temperature the air will become saturated. At the dew point the ...
... what is dew? Dew is caused by moisture in air and temperature differentials. Warm air can hold more moisture; cold air less. The measurement of the water-to-air ratio is relative humidity (RH). When moist warm air cools to the dew point temperature the air will become saturated. At the dew point the ...
2. The Anatomy of Stellar Life and Death
... Once a protostar has formed, gravity continues to contract the object, heating it steadily until nuclear reactions can begin. The lowest mass stars take over 2 billion years to stabilize, but as the mass increases, the time spent growing and maturing decreases. A star with the mass of the Sun spends ...
... Once a protostar has formed, gravity continues to contract the object, heating it steadily until nuclear reactions can begin. The lowest mass stars take over 2 billion years to stabilize, but as the mass increases, the time spent growing and maturing decreases. A star with the mass of the Sun spends ...
STAR ANALYSER 100 USER MANUAL PATON HAWKSLEY EDUCATION LTD
... means that a much higher proportion of the light is directed into the spectrum compared with lower cost unblazed or holographic film gratings for example, allowing far fainter objects to be recorded. It is physically identical to a standard 1 1/4 inch filter. This means it can be screwed onto a stan ...
... means that a much higher proportion of the light is directed into the spectrum compared with lower cost unblazed or holographic film gratings for example, allowing far fainter objects to be recorded. It is physically identical to a standard 1 1/4 inch filter. This means it can be screwed onto a stan ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.