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Missions
... Only in the sixties were these new detectors pointed at the sky, and even then infrared astronomy was just expected to be an adjunct to optical astronomy. “Stars, after all, were known to be visible objects; and the Universe appeared to be an aggregate of stars”, writes US infrared pioneer Martin Ha ...
... Only in the sixties were these new detectors pointed at the sky, and even then infrared astronomy was just expected to be an adjunct to optical astronomy. “Stars, after all, were known to be visible objects; and the Universe appeared to be an aggregate of stars”, writes US infrared pioneer Martin Ha ...
Astrospheres and Solar-like Stellar Winds | SpringerLink
... Sun. The heliosphere and astrospheres contain a population of hydrogen heated by charge exchange processes that can produce enough H I Lyα absorption to be detectable in UV spectra of nearby stars from the Hubble Space Telescope (HST). The amount of astrospheric absorption is a diagnostic for the st ...
... Sun. The heliosphere and astrospheres contain a population of hydrogen heated by charge exchange processes that can produce enough H I Lyα absorption to be detectable in UV spectra of nearby stars from the Hubble Space Telescope (HST). The amount of astrospheric absorption is a diagnostic for the st ...
THE N/O RATIO IN EARLY B-TYPE MAIN SEQUENCE STARS AS
... This paper is based on previous studies of MS B-stars which were published between 2000 and 2008 by Lyubimkov, et al. [8-12]. High resolution spectra for more than 100 MS B-stars were obtained [8] at two observatories, the Crimean Astrophysical Observatory and the MacDonald Observatory of the Unive ...
... This paper is based on previous studies of MS B-stars which were published between 2000 and 2008 by Lyubimkov, et al. [8-12]. High resolution spectra for more than 100 MS B-stars were obtained [8] at two observatories, the Crimean Astrophysical Observatory and the MacDonald Observatory of the Unive ...
Observational studies of stellar rotation
... the planetary formation and migration processes. It is therefore of prime importance to understand the origin and evolution of stellar angular momentum, indeed one of the most challenging issues of modern stellar physics. Conversely, the evolution of stellar spin rate is governed by fundamental proc ...
... the planetary formation and migration processes. It is therefore of prime importance to understand the origin and evolution of stellar angular momentum, indeed one of the most challenging issues of modern stellar physics. Conversely, the evolution of stellar spin rate is governed by fundamental proc ...
complete lab manual
... In its teaching role, the Observatory is used by approximately 1500 undergraduate students each year to view celestial objects that would otherwise only be seen on the pages of a textbook or discussed in classroom lectures. The 16- and 18-inch telescopes on the observing deck are both under computer ...
... In its teaching role, the Observatory is used by approximately 1500 undergraduate students each year to view celestial objects that would otherwise only be seen on the pages of a textbook or discussed in classroom lectures. The 16- and 18-inch telescopes on the observing deck are both under computer ...
$doc.title
... Table 1 lists the 18 objects studied in this project with a number of important characteristics. The spectral type is a kind of “mean” value for what is found in the literature (using Vizier; Ochsenbein et al., 2000)1. The carbon star TW Hor is an exception in this sample. We include it because it w ...
... Table 1 lists the 18 objects studied in this project with a number of important characteristics. The spectral type is a kind of “mean” value for what is found in the literature (using Vizier; Ochsenbein et al., 2000)1. The carbon star TW Hor is an exception in this sample. We include it because it w ...
1 - Piscataway High School
... but stars less massive than about 0.4 solar mass never get hot enough to ignite helium. Stars more massive than 3 solar masses ignite helium before their contracting cores become degenerate. Whether a star experiences a helium flash or not, the ignition of helium in the core changes the structure of ...
... but stars less massive than about 0.4 solar mass never get hot enough to ignite helium. Stars more massive than 3 solar masses ignite helium before their contracting cores become degenerate. Whether a star experiences a helium flash or not, the ignition of helium in the core changes the structure of ...
NATS 1311-From the Cosmos to Earth
... frequently divided into neat packages called biology, chemistry, geology, physics, astronomy --– Nature is not so divided - Each scientific discipline views nature from a different perspective, but all are studying the same world. ...
... frequently divided into neat packages called biology, chemistry, geology, physics, astronomy --– Nature is not so divided - Each scientific discipline views nature from a different perspective, but all are studying the same world. ...
Listening for Gravitational Waves (ppt version)
... Their measurements showed that the light from these stars was bent as it grazed the Sun, by the exact amount of Einstein's predictions. The light never changes course, but merely follows the curvature of space. Astronomers now refer to this displacement of light as gravitational lensing. ...
... Their measurements showed that the light from these stars was bent as it grazed the Sun, by the exact amount of Einstein's predictions. The light never changes course, but merely follows the curvature of space. Astronomers now refer to this displacement of light as gravitational lensing. ...
The Circumstellar Environments of Young Stars at AU Scales
... rounds a young star of intermediate mass [~2–10 M (see, e.g., the review by Natta et al., 2000)]. A significant number of these objects fall within the sensitivity limits of small interferometers, hence the first YSO studies containing relatively large samples focused on objects in this class. AB Au ...
... rounds a young star of intermediate mass [~2–10 M (see, e.g., the review by Natta et al., 2000)]. A significant number of these objects fall within the sensitivity limits of small interferometers, hence the first YSO studies containing relatively large samples focused on objects in this class. AB Au ...
UV, IR, and mm Studies of CO Surrounding the Red Supergiant α
... North and West observations the cleaned spectra of all three vibrational lines show a similar dependence of line profile shape with impact parameter. Figure 2 shows four R(2) spectra obtained at different impact parameters. Beyond an impact parameter of 2.5 arcsec the S1 component begins to narrow a ...
... North and West observations the cleaned spectra of all three vibrational lines show a similar dependence of line profile shape with impact parameter. Figure 2 shows four R(2) spectra obtained at different impact parameters. Beyond an impact parameter of 2.5 arcsec the S1 component begins to narrow a ...
Towards the understanding of the deepest layers of solar
... provide high-quality seismic data. These seismic data combined with non-seismic surface stellar observables can provide valuable information about the global properties of pulsating stars, such as their mass, radius and age. Nevertheless, it is in their interiors, inaccessible to our eyes, that most ...
... provide high-quality seismic data. These seismic data combined with non-seismic surface stellar observables can provide valuable information about the global properties of pulsating stars, such as their mass, radius and age. Nevertheless, it is in their interiors, inaccessible to our eyes, that most ...
Astronomical Picture of the Day
... about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) shows the constellation Orion, with labels for several bright stars and the location of the Orion Nebula. The Orion Nebula is faintly visible to the naked eye, and you can see some detail with a good pair ...
... about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) shows the constellation Orion, with labels for several bright stars and the location of the Orion Nebula. The Orion Nebula is faintly visible to the naked eye, and you can see some detail with a good pair ...
Galileo`s miraculous year: 1609 and the revolutionary telescope
... other closely spaced pair of stars, could be observed with Galileo’s telescope or any other technology before the 18th century. Indeed it was the observation of stellar aberration22 by James Bradley in 1725 that first detected Earth’s orbit around the Sun. This is an effect that arises from the chang ...
... other closely spaced pair of stars, could be observed with Galileo’s telescope or any other technology before the 18th century. Indeed it was the observation of stellar aberration22 by James Bradley in 1725 that first detected Earth’s orbit around the Sun. This is an effect that arises from the chang ...
abstracts book - Instituto de Astrofísica e Ciências do Espaço
... has secured major advances in the understanding of the physics of the stellar interiors and has allowed us to build and prepare the tools to look at other stars. Several ground facilities and space missions have completed the picture by adding the necessary data to study stars across the HR diagram ...
... has secured major advances in the understanding of the physics of the stellar interiors and has allowed us to build and prepare the tools to look at other stars. Several ground facilities and space missions have completed the picture by adding the necessary data to study stars across the HR diagram ...
OASI News - the Orwell Astronomical Society, Ipswich
... 20th March for the best eclipse visible locally for many years. It will be 85%. As it is a Friday morning, members are advised to get it in their diaries now, especially those who have to book leave from work. OASI members who attend will be given a free pair of certified solar glasses to use and ke ...
... 20th March for the best eclipse visible locally for many years. It will be 85%. As it is a Friday morning, members are advised to get it in their diaries now, especially those who have to book leave from work. OASI members who attend will be given a free pair of certified solar glasses to use and ke ...
50 Annual ! th
... For as long as I can remember, I have been fascinated with discovering how the universe works. From being bewildered as to why my fishing spear became bent underwater in rural Ontario, to pouring over internet articles on light and optics, to tormenting my older brother and parents with theories and ...
... For as long as I can remember, I have been fascinated with discovering how the universe works. From being bewildered as to why my fishing spear became bent underwater in rural Ontario, to pouring over internet articles on light and optics, to tormenting my older brother and parents with theories and ...
Neon abundances - UCL Astrophysics Group
... Explorer (IUE) on the ultraviolet resonance lines of iron-peak elements in 26 HgMn, four superficially normal and 10 normal stars. We observed definite detections or determined upper limits for Ne i in 21 of the HgMn stars in the Smith & Dworetsky (1993) sample, and in 11 of the normal and superfici ...
... Explorer (IUE) on the ultraviolet resonance lines of iron-peak elements in 26 HgMn, four superficially normal and 10 normal stars. We observed definite detections or determined upper limits for Ne i in 21 of the HgMn stars in the Smith & Dworetsky (1993) sample, and in 11 of the normal and superfici ...
Comparing stars - The Open University
... Though we have not marked it on Figure 5, there is a class of stars that comprises the red giants plus the stars to their left that lie between the main sequence and the supergiants. This class is the giants and is broader than that of red giants alone. You can see from Figure 5 that white dwarfs ar ...
... Though we have not marked it on Figure 5, there is a class of stars that comprises the red giants plus the stars to their left that lie between the main sequence and the supergiants. This class is the giants and is broader than that of red giants alone. You can see from Figure 5 that white dwarfs ar ...