Locating Geographic Coordinates Using Observations over the Sun
... find out how the knowledge about the Earth’s rotation, its revolution around the Sun, and the Earth’s position relative to the Polaris star can be applied for the practical purpose of determining the coordinates of the observer on Earth. The main priority in the essay is given to discussion of the o ...
... find out how the knowledge about the Earth’s rotation, its revolution around the Sun, and the Earth’s position relative to the Polaris star can be applied for the practical purpose of determining the coordinates of the observer on Earth. The main priority in the essay is given to discussion of the o ...
Oxygen and Neon Abundances of B-Type Stars in Comparison with
... uvbybetanew program,5 which is based on Moon’s (1985) UVBYBETA (estimation of intrinsic colors corrected for interstellar reddening) and TEFFLOGG (Teff =logg determination from dereddened colors) programs. The observational data of b y, c1 , m1 , and ˇ were taken from Hauck and Mermilliod (1998) vi ...
... uvbybetanew program,5 which is based on Moon’s (1985) UVBYBETA (estimation of intrinsic colors corrected for interstellar reddening) and TEFFLOGG (Teff =logg determination from dereddened colors) programs. The observational data of b y, c1 , m1 , and ˇ were taken from Hauck and Mermilliod (1998) vi ...
DIPLOMA THESIS Spectroscopic study of the star 70 Virginis and its
... (2) A ‘dwarf planet’ is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satelli ...
... (2) A ‘dwarf planet’ is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satelli ...
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... There is a significant Charge Transfer Efficiency (CTE) effect for all CCD detectors used in HST instruments; WFPC2: Dolphin (2000), STIS: Goudfrooij et al.(2006), ACS: Riess & Mack (2004), where the CTE effect was discussed in the terms of CTE-induced photometric losses in aperture photometry. Howe ...
... There is a significant Charge Transfer Efficiency (CTE) effect for all CCD detectors used in HST instruments; WFPC2: Dolphin (2000), STIS: Goudfrooij et al.(2006), ACS: Riess & Mack (2004), where the CTE effect was discussed in the terms of CTE-induced photometric losses in aperture photometry. Howe ...
Live from McDonald Observatory: Observing Venus: explore how it
... 2012 happens to be a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, ...
... 2012 happens to be a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, ...
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 ...
1 Dark matter and dark energy comprise over 90% of the Universe
... rotational curves of stars in the outer regions of elliptical galaxies where stars exhibit velocities higher than would be expected, suggesting the presence of dark matter in galaxies. On a much larger scale dark matter plays a considerable role in determining the fate of the Universe. The mean dens ...
... rotational curves of stars in the outer regions of elliptical galaxies where stars exhibit velocities higher than would be expected, suggesting the presence of dark matter in galaxies. On a much larger scale dark matter plays a considerable role in determining the fate of the Universe. The mean dens ...
Comparing stars - The Open University
... than the Sun, and appears bluish-white. It has the greatest apparent visual brightness (most negative apparent visual magnitude!) of any star in the night sky. This is, as we have seen, not because it is very luminous, but because it is both fairly luminous and rather close - at 2.63 pc it's the sev ...
... than the Sun, and appears bluish-white. It has the greatest apparent visual brightness (most negative apparent visual magnitude!) of any star in the night sky. This is, as we have seen, not because it is very luminous, but because it is both fairly luminous and rather close - at 2.63 pc it's the sev ...
Understanding Resolution
... disk that the disk itself may take up 85% of the Airy disk diameter. The central disk of a faint star may take up less than 50% of the Airy disk diameter, leaving more dark space in the first diffraction interspace. A reasonable assumption is for moderately bright stars near 6th magnitude 50% to 60% ...
... disk that the disk itself may take up 85% of the Airy disk diameter. The central disk of a faint star may take up less than 50% of the Airy disk diameter, leaving more dark space in the first diffraction interspace. A reasonable assumption is for moderately bright stars near 6th magnitude 50% to 60% ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... Book of the Fixed Stars also includes the first recorded observation of the “nebula” now known as the galaxy M 31 in Andromeda. 1.2 Galileo Examines the Nebulae By the time the telescope was invented, around 1608, probably nine open clusters were known, of which about four could be more-or-less reso ...
... Book of the Fixed Stars also includes the first recorded observation of the “nebula” now known as the galaxy M 31 in Andromeda. 1.2 Galileo Examines the Nebulae By the time the telescope was invented, around 1608, probably nine open clusters were known, of which about four could be more-or-less reso ...
Activity Indices Based on Sun-as-a-Star Spectra Obtained with the
... Context The Sun is only an average star, but the Earth’s main energy source and therefore influences our lives in many respects. Consequently, understanding its activity variations is important to us. Unlike other stars, however, we can observe the Sun in greater detail and have disk-resolved spectr ...
... Context The Sun is only an average star, but the Earth’s main energy source and therefore influences our lives in many respects. Consequently, understanding its activity variations is important to us. Unlike other stars, however, we can observe the Sun in greater detail and have disk-resolved spectr ...
ULTRA Optics - Composite Mirror Applications Inc.
... For quantifying the wave front quality of the CFRP mirrors, we used a HASO-32 Shack-Hartman wave front sensor. The instrument has a large dynamic range and is relatively insensitive to atmospheric disturbances. The number 32 corresponds to the 32 X 32 micro-lenslet array used as the Shack-Hartman ar ...
... For quantifying the wave front quality of the CFRP mirrors, we used a HASO-32 Shack-Hartman wave front sensor. The instrument has a large dynamic range and is relatively insensitive to atmospheric disturbances. The number 32 corresponds to the 32 X 32 micro-lenslet array used as the Shack-Hartman ar ...
Beyond Pluto: Exploring the outer limits of the solar - e
... astronomers have been fascinated by the possibility that there might be other unknown worlds. On the 1st of January 1801 the Italian astronomer Giuseppe Piazzi made a chance discovery of what was at first thought to be a new planet. The object, which was soon shown to be orbiting between Mars and Jup ...
... astronomers have been fascinated by the possibility that there might be other unknown worlds. On the 1st of January 1801 the Italian astronomer Giuseppe Piazzi made a chance discovery of what was at first thought to be a new planet. The object, which was soon shown to be orbiting between Mars and Jup ...
New Worlds, New Horizons in Astronomy and
... scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal governme ...
... scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal governme ...
Differential measurement of atmospheric
... astrometry is how to establish more reasonable atmospheric refraction models and how to improve the correction accuracy of atmospheric refraction. With the continuous release of high-precision star catalogs, the method of relative celestial positioning based on photographic technique can effectively ...
... astrometry is how to establish more reasonable atmospheric refraction models and how to improve the correction accuracy of atmospheric refraction. With the continuous release of high-precision star catalogs, the method of relative celestial positioning based on photographic technique can effectively ...
The Deaths of Very Massive Stars
... For solar metallicity stars, mass loss may reduce the presupernova mass of the star to a level where it can frequently explode. If it does and the entire envelope has been lost, the explosion will be some sort of Type Ib or IC supernova. Because of the large mass, the light curve would be broad, and ...
... For solar metallicity stars, mass loss may reduce the presupernova mass of the star to a level where it can frequently explode. If it does and the entire envelope has been lost, the explosion will be some sort of Type Ib or IC supernova. Because of the large mass, the light curve would be broad, and ...
Characterization of the four new transiting planets KOI
... on KOIs characterization with the HARPS-N spectrograph at the Telescopio Nazionale Galileo (TNG, La Palma, Spain), taking advantage of its higher radial-velocity accuracy for fainter targets. Our observation strategy with HARPS-N complements SOPHIE observations in three ways. First, we use HARPS-N t ...
... on KOIs characterization with the HARPS-N spectrograph at the Telescopio Nazionale Galileo (TNG, La Palma, Spain), taking advantage of its higher radial-velocity accuracy for fainter targets. Our observation strategy with HARPS-N complements SOPHIE observations in three ways. First, we use HARPS-N t ...
TERMS USED IN MANIPULATING A TRANSIT VERNIER
... 1.Centering : Centering means setting the theodolite exactly over an instrument- station so that its vertical axis lies immediately above the station- mark. It can be done by means of plumb bob suspended from a small hook attached to the vertical axis of the theodolite. The centre shifting arrangeme ...
... 1.Centering : Centering means setting the theodolite exactly over an instrument- station so that its vertical axis lies immediately above the station- mark. It can be done by means of plumb bob suspended from a small hook attached to the vertical axis of the theodolite. The centre shifting arrangeme ...
Orion® StarShoot™ AutoGuider inStructiOn MAnuAl
... We recommend using the SSAG for the first time during the day. This way, you can become familiar with the basic camera functions without having to stumble around in the dark. Setup your telescope and mount so the optical tube is pointing at an object that is at least a couple of hundred feet away. I ...
... We recommend using the SSAG for the first time during the day. This way, you can become familiar with the basic camera functions without having to stumble around in the dark. Setup your telescope and mount so the optical tube is pointing at an object that is at least a couple of hundred feet away. I ...
Elliptical galaxies
... plane relation (last panel) They express some fundamental property of E galaxies. They can be understood partially from the virial theorem ...
... plane relation (last panel) They express some fundamental property of E galaxies. They can be understood partially from the virial theorem ...
UK Exoplanet community meeting 2017
... Discussion and Q&A: Stellar Activity in Exoplanet Surveys Heather Cegla & Raphaëlle Haywood (University of Geneva, Harvard-Smithsonian Center for Astrophysics) Discussion and Q&A: Stellar Activity in Exoplanet Surveys – Dr Heather Cegla and Dr Raphaëlle Haywood – The main obstacle that we current ...
... Discussion and Q&A: Stellar Activity in Exoplanet Surveys Heather Cegla & Raphaëlle Haywood (University of Geneva, Harvard-Smithsonian Center for Astrophysics) Discussion and Q&A: Stellar Activity in Exoplanet Surveys – Dr Heather Cegla and Dr Raphaëlle Haywood – The main obstacle that we current ...
Relativity, Space-Time And Cosmology
... Every single culture has had a theory of the formation of the universe and the laws that rule it. Such a system is called a cosmology (from the Greek kosmos: world, and logia from legein: to speak). The first coherent non-religious cosmology was developed during ancient Greece, and much attention wi ...
... Every single culture has had a theory of the formation of the universe and the laws that rule it. Such a system is called a cosmology (from the Greek kosmos: world, and logia from legein: to speak). The first coherent non-religious cosmology was developed during ancient Greece, and much attention wi ...
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.