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Characterization and Subtraction of Well
Characterization and Subtraction of Well

the PDF program book
the PDF program book

... Reserve a Meeting Room There are five meeting rooms in UKK (rooms K1 – K4, K6) that may be used for meetings or telecons. The rooms are located on level 3 and seat between 12 and 24 people. If you want to hold a small meeting, you can either speak to the LOC representative at the registration desk o ...
ALTERNATIVE DESIGNS FOR SPACE X
ALTERNATIVE DESIGNS FOR SPACE X

... rectangular boxes with the same outer dimensions. Along a column, the segments are nearly identical and many are interchangeable with each other. All reflectors deviate from flatness only slightly. On the other hand the Wolter reflectors are highly curved in the azimuthal direction and the curvature ...
Late Summer Messier Objects
Late Summer Messier Objects

... There are 24 Messier objects between RA 18 and RA 21, the second-richest octal of the Messier list after the one that includes the Virgo Cluster. The abundance of Messier objects is due to the fact that this part of the sky contains the widest, richest, and brightest part of the Milky Way, with some ...
Luminosity, Flux and Magnitudes Outline
Luminosity, Flux and Magnitudes Outline

... by the microscopic motions of particles. There is a continuum of energy levels associated with this motion. If the object is in thermal equilibrium then it can be characterized by a single quantity, it’s temperature. An object in thermal equilibrium emits energy at all wavelengths. ...
Determination of the distance to the Andromeda Galaxy using variable stars U
Determination of the distance to the Andromeda Galaxy using variable stars U

... up similarities and differences between solar and stellar flares is to continuously broaden the ensemble of analyzed flares (solar and stellar as well), thus making an observational base of different types of flaring activities available for theoretical purposes. This is how solar flare observations c ...
On the elemental abundance and isotopic mixture of mercury in
On the elemental abundance and isotopic mixture of mercury in

... on the behaviour of the Hg  λ3984 line, but the latter two studied the Hg  λ4358 line in selected stars. Smith (1997) also included a low-resolution study of Hg  λ1942 using data from the International Ultraviolet Explorer (IUE) satellite. High-resolution ultraviolet studies of additional mercu ...
Project_Description2
Project_Description2

... Since the work of J. Strong (1933), aluminum has been the standard coating material for astronomical telescope mirrors. It is easy to deposit, has reflectance above 90% for most of the optical-UV to the near IR (although there is a significant drop in the 700-900nm region), and it develops a native ...
Polarimetry: a powerful diagnostic tool in astronomy
Polarimetry: a powerful diagnostic tool in astronomy

... giant reflection nebula with polarizations as high as 10%, despite dilution by stars in the galaxy (figure 5). The polarization pattern can be used to determine the location of the obscured source (where the normals to each polarization vector intersect), the degrees of polarization in the two lobes ...
Mirror coatings for the Large Synoptic Survey Telescope
Mirror coatings for the Large Synoptic Survey Telescope

... these activities. The M2 mirror washing, stripping and drying process will be simpler and will be mostly manual as its surface is smaller than the M1M3 mirror surface and is easily accessible from the inside and outside diameters due to its large inside diameter dimension. Because the M1M3 mirror mu ...
FY96
FY96

... of 56 km/s. That result is consistent with two previous surveys in the same direction, with negative net radial velocities of blue horizontal branch stars, RR Lyrae variables, and A stars. In the initial sample, there are very few stars that are not associated with one of the major common motion gro ...
X-ray emission from supernova shock waves Tanja Kramer Nymark Department of Astronomy
X-ray emission from supernova shock waves Tanja Kramer Nymark Department of Astronomy

... introduction is to give the reader a general background to the field and a more thorough description of the theory than is given in the papers. To this end I start with a general description of supernovae in chapter 2. In chapter 3 I give a more detailed description of circumstellar interaction, whi ...
Joint formation of QSOs and spheroids: QSOs as clocks of star
Joint formation of QSOs and spheroids: QSOs as clocks of star

Chandra Characterization of X-ray Emission in the Young F
Chandra Characterization of X-ray Emission in the Young F

LaPalma_2013_Hook
LaPalma_2013_Hook

... • Of particular interest is the case where coma is eliminated the aplanatic Cassegrain is the Ritchey-Chretien (RC) ...
Constraining tidal dissipation in F-type main
Constraining tidal dissipation in F-type main

Evolution of low mass stars
Evolution of low mass stars

... Galilei observed stars in the Milky Way with a telescope. For the next 300 years astronomers routinely observed the Galactic stars, recorded their brightness and location, and classified them into different categories. However, the underlying physics of stars was still poorly understood until the mod ...
Simulations of the galaxy population constrained by observations
Simulations of the galaxy population constrained by observations

... of the stellar mass-halo mass relation. This work uses merger trees from two very large dark matter simulations, which are well adapted to study galaxy formation physics on a variety of scales. The Millennium Simulation (Springel et al. 2005) follows 1010 particles in a cube of side 500h−1 Mpc, impl ...
Luminosities and mass-loss rates of SMC and LMC AGB stars and
Luminosities and mass-loss rates of SMC and LMC AGB stars and

... interstellar medium, AGB stars are key players in the life cycle of dust and gas in the universe. However, a quantitative understanding of the mass-loss process is still largely lacking, particularly its dependence on metallicity. Aims. To investigate the relation between mass loss, luminosity and p ...
The Young Stars
The Young Stars

... have provided most of our knowledge of Young Stellar Objects (YSOs). Due to their large numbers, however, they also provide us with statistical samples and spatial distributions. Finally, we find that both accretion and outflow have not been entirely eradicated but are still ongoing in a moderate fo ...
A Digital Spectral Classification Atlas
A Digital Spectral Classification Atlas

... MK system is defined by a set of standard stars, and classification on the system is carried out by the comparison of the program star with the standard stars, taking into account all of the features in the spectrum. The use of standards is vital because it maintains the autonomy of the system as we ...
Combined Earth-/Star-Sensor for Attitude and Orbit Determination of
Combined Earth-/Star-Sensor for Attitude and Orbit Determination of

... I am grateful to Professor K. Janschek for his advice and his contribution to this piece of work. I want to express my gratitude to hon.-Professor Dr. E. Gottzein who initiated this research and laid the foundation to the results as they are presented and her continuous active support during this th ...
Astrometric accuracy during the past 2000 years
Astrometric accuracy during the past 2000 years

... The points marked “parallaxes” might be labelled “small-angle astrometry” or “relative astrometry”, and all ground-based measurements of parallaxes are of that kind. This is about ten times more accurate than large-angle astrometry which was required to measure the positions shown in the diagram. Th ...
Vocabulary Definitions
Vocabulary Definitions

... parallel continuing in the same direction and always the same distance apart (SRB) phase each different shape of the Moon (SRB, IG) planet an object that orbits a star and is massive enough for its own gravity to force it into a spherical shape (SRB) plutoid a type of dwarf planet that has an orbit ...
The Circumstellar Environments of Young Stars at AU Scales
The Circumstellar Environments of Young Stars at AU Scales

... arises in disk-like structures came from single-telescope imaging of the highly luminous YSOs LkHα 101 and MWC 349-A, using a single-telescope interferometric technique (aperture masking at the Keck I telescope). MWC 349-A appeared clearly elongated (Danchi et al., 2001) and LkHα 101 presented an as ...
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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.
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