9. Telescope structure and kinematics
... achievable limits of structural eigen-frequencies impose that image stabilisation be implemented downstream in the optical train. The mechanical structure shall be seen as a “skeleton”, which supports all the sub-systems of the telescope. The demonstration of its feasibility is therefore one of the ...
... achievable limits of structural eigen-frequencies impose that image stabilisation be implemented downstream in the optical train. The mechanical structure shall be seen as a “skeleton”, which supports all the sub-systems of the telescope. The demonstration of its feasibility is therefore one of the ...
Kepler Mission
... the ecliptic plane in order for it to not be blocked by the Sun or Moon during its course. As the spacecraft orbits the Sun, it experiences a 90-degree turn every three months, the only movement the spacecraft actually undertakes, so that the solar panels can continue to face the Sun while the photo ...
... the ecliptic plane in order for it to not be blocked by the Sun or Moon during its course. As the spacecraft orbits the Sun, it experiences a 90-degree turn every three months, the only movement the spacecraft actually undertakes, so that the solar panels can continue to face the Sun while the photo ...
observations of white dwarfs in the solar neighborhood
... transport as well as relevant broadening mechanisms for the hydrogen lines. The optical/infrared data for the DA and nonDA white dwarfs were analyzed using the calibrated colors of Bergeron, Wesemael, & Beauchamp (1995b) at log g = 8. We used the models of Wood (1995) to calculate the white dwarf ma ...
... transport as well as relevant broadening mechanisms for the hydrogen lines. The optical/infrared data for the DA and nonDA white dwarfs were analyzed using the calibrated colors of Bergeron, Wesemael, & Beauchamp (1995b) at log g = 8. We used the models of Wood (1995) to calculate the white dwarf ma ...
What to do to a Dob
... • The interface box is then connected to a computer • Software on the computer, say a planetarium program, gives the user access to a database of objects to find, etc. ...
... • The interface box is then connected to a computer • Software on the computer, say a planetarium program, gives the user access to a database of objects to find, etc. ...
Astronomy Astrophysics
... that of WD 1845+019 (see Fig. 2 of Maxted & Marsh 1999). In this case the emission is due to a cool companion star in a long orbit around the white dwarf. This scenario could also be valid for WD 0518+333 and might explain why different methods of analysis give such disparate results. The low gravity ...
... that of WD 1845+019 (see Fig. 2 of Maxted & Marsh 1999). In this case the emission is due to a cool companion star in a long orbit around the white dwarf. This scenario could also be valid for WD 0518+333 and might explain why different methods of analysis give such disparate results. The low gravity ...
Chandra News March 2005 Published by the Chandra X-ray Center (CXC)
... X-ray drop. Radio observations by Bob Duncan and Stephen White confirmed the presence of a minimum in radio brightness but also showed secular decreases in the radio emission. This is in contrast to the RXTE observations which showed secular increases in the 2-10 keV flux for most of the interval pr ...
... X-ray drop. Radio observations by Bob Duncan and Stephen White confirmed the presence of a minimum in radio brightness but also showed secular decreases in the radio emission. This is in contrast to the RXTE observations which showed secular increases in the 2-10 keV flux for most of the interval pr ...
3. Cosmology and the Origin and Evolution of Galaxies
... collapse of the highest-density peaks of the underlying large-scale matter distribution, or whether they are built over a longer period from the continuous merging of lower-mass systems with much more modest rates of star formation. redshift ...
... collapse of the highest-density peaks of the underlying large-scale matter distribution, or whether they are built over a longer period from the continuous merging of lower-mass systems with much more modest rates of star formation. redshift ...
P1 09 Red Shift - Animated Science
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
Starter Edition Handbook
... you are seeing; how amazing it is that you are seeing these things with your very own eyes, and the hunt. In order to appreciate most deep sky objects you need to look not only with your eyes, but with your mind as well. That elongated fuzzy cloud takes on meaning when you try to imagine just how bi ...
... you are seeing; how amazing it is that you are seeing these things with your very own eyes, and the hunt. In order to appreciate most deep sky objects you need to look not only with your eyes, but with your mind as well. That elongated fuzzy cloud takes on meaning when you try to imagine just how bi ...
21 -26 August University of Exeter
... giant molecular cloud formation timescale over its dispersal timescale, whereas the massive end is controlled by cloud-cloud collisions. Future large radio observations with finer spatial resolution and higher sensitivity can observe giant molecular clouds with much lower mass than before, which may ...
... giant molecular cloud formation timescale over its dispersal timescale, whereas the massive end is controlled by cloud-cloud collisions. Future large radio observations with finer spatial resolution and higher sensitivity can observe giant molecular clouds with much lower mass than before, which may ...
The Search for Directed Intelligence
... effects which would otherwise be overwhelming for a broadband photometric band survey. Heterodyning is also possible could be used in the future but is not assumed as we do not posses large focal plane arrays of such detectors. 5.2 Cosmic IR Background - CIB The CIB was first detected by the Diffuse ...
... effects which would otherwise be overwhelming for a broadband photometric band survey. Heterodyning is also possible could be used in the future but is not assumed as we do not posses large focal plane arrays of such detectors. 5.2 Cosmic IR Background - CIB The CIB was first detected by the Diffuse ...
Astronomy 518 Astrometry Lecture
... celestial sphere, then the celestial coordinates (α,δ ) of objects, which are defined by the reference of the celestial equator and celestial poles, are also constantly changing. • The effects are very noticeable (50.27) arc secs a year along the ecliptic. • Since the location of the equinox changes ...
... celestial sphere, then the celestial coordinates (α,δ ) of objects, which are defined by the reference of the celestial equator and celestial poles, are also constantly changing. • The effects are very noticeable (50.27) arc secs a year along the ecliptic. • Since the location of the equinox changes ...
Hot subdwarf stars-galactic orbits and distribution perpendicular to
... (small) sample had disk orbits but 1 star had an orbit with z-distance maxima ranging from 8 to 20 kpc. Evidence for more stars with halo orbits was given by de Boer et al. (1995). We have investigated 41 stars for their kinematic behaviour. The choice of stars was solely determined by the availabil ...
... (small) sample had disk orbits but 1 star had an orbit with z-distance maxima ranging from 8 to 20 kpc. Evidence for more stars with halo orbits was given by de Boer et al. (1995). We have investigated 41 stars for their kinematic behaviour. The choice of stars was solely determined by the availabil ...
Galaxies - University of Iowa Astrophysics
... 1. Measure the distance to star A to be 200 pc. 2. Measure the flux of star A. 3. Measure the flux of star B, which is known to have the same luminosity as star A, to be lower by a factor of 1600 (or the flux of A is 1600 times the flux of B). 4. Find the distance to star B. ...
... 1. Measure the distance to star A to be 200 pc. 2. Measure the flux of star A. 3. Measure the flux of star B, which is known to have the same luminosity as star A, to be lower by a factor of 1600 (or the flux of A is 1600 times the flux of B). 4. Find the distance to star B. ...
Chapter 16--Properties of Stars
... strikes its light-sensitive surface each second. For example, such a detector would record an apparent brightness of 2.7 108 watt per square meter from Alpha Centauri A. The only difficulties involved in measuring apparent brightness are making sure the detector is properly calibrated and, for gr ...
... strikes its light-sensitive surface each second. For example, such a detector would record an apparent brightness of 2.7 108 watt per square meter from Alpha Centauri A. The only difficulties involved in measuring apparent brightness are making sure the detector is properly calibrated and, for gr ...
Superbubble Activity in Star-Forming Galaxies M. S. Oey
... power and other parameters are well-constrained. This was carried out for eight, young, wind-dominated LMC superbubbles by Oey & Massey (1995), Oey (1996), and Oey & Smedley (1998). The predicted growth rate for the shells was higher than implied by their observed R and v, equivalent to an overestim ...
... power and other parameters are well-constrained. This was carried out for eight, young, wind-dominated LMC superbubbles by Oey & Massey (1995), Oey (1996), and Oey & Smedley (1998). The predicted growth rate for the shells was higher than implied by their observed R and v, equivalent to an overestim ...
Celestron Dacl"fl"c ...the world`s leading manufacturer the Celestron
... which occasionally limit the magnification at which large telescopes can be used. It is based on the assumption that telescopes of different aperture but comparably good quality will be tested at the actual magnification at which they are used by observers to view abjects of greatest interest. As an ...
... which occasionally limit the magnification at which large telescopes can be used. It is based on the assumption that telescopes of different aperture but comparably good quality will be tested at the actual magnification at which they are used by observers to view abjects of greatest interest. As an ...
ALMA Science Results
... • Galaxies and Galactic Nuclei II (chair: Alberto Bolatto) – 13:30 - 14:00 (invited) Galaxies and galaxy nuclei with ALMA • Susanne Aalto, Chalmers University of Technology – Vibrationally excited molecules probe central regions but HCN and HCO+ are very optically thick owing to steep T gradient an ...
... • Galaxies and Galactic Nuclei II (chair: Alberto Bolatto) – 13:30 - 14:00 (invited) Galaxies and galaxy nuclei with ALMA • Susanne Aalto, Chalmers University of Technology – Vibrationally excited molecules probe central regions but HCN and HCO+ are very optically thick owing to steep T gradient an ...
Document
... First views of solar ejected clouds impacting the Earth UK involvement: (i) Novel CCD camera systems on all remote sensing systems aboard the spacecraft; (ii) Leadership of the unique Heliospheric Imager instrument, a wide-angle telescope system, to image solar clouds in interplanetary space ...
... First views of solar ejected clouds impacting the Earth UK involvement: (i) Novel CCD camera systems on all remote sensing systems aboard the spacecraft; (ii) Leadership of the unique Heliospheric Imager instrument, a wide-angle telescope system, to image solar clouds in interplanetary space ...
Big History`s approach to knowledge
... Ptolemy collected and summarized Greek knowledge of the known Universe. His work enabled astronomers to pinpoint the planets and predict solar and lunar eclipses. Because of this, his ideas were accepted by Byzantine, Islamic and Europe scholars for more than 1,400 years. Ptolemy accepted Aristotle’ ...
... Ptolemy collected and summarized Greek knowledge of the known Universe. His work enabled astronomers to pinpoint the planets and predict solar and lunar eclipses. Because of this, his ideas were accepted by Byzantine, Islamic and Europe scholars for more than 1,400 years. Ptolemy accepted Aristotle’ ...
UNIT 2—THE BIG BANG
... Ptolemy collected and summarized Greek knowledge of the known Universe. His work enabled astronomers to pinpoint the planets and predict solar and lunar eclipses. Because of this, his ideas were accepted by Byzantine, Islamic and Europe scholars for more than 1,400 years. Ptolemy accepted Aristotle’ ...
... Ptolemy collected and summarized Greek knowledge of the known Universe. His work enabled astronomers to pinpoint the planets and predict solar and lunar eclipses. Because of this, his ideas were accepted by Byzantine, Islamic and Europe scholars for more than 1,400 years. Ptolemy accepted Aristotle’ ...
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.