![The Cosmos in Your Pocket: How Cosmological](http://s1.studyres.com/store/data/015220038_1-8ccbd8bf7cd8a6312724f8a8f391c302-300x300.png)
20. Meteorites and the chemical evolution of the Milky Way
... and metallicity. Moreover, there are still large uncertainties in the predicted yields due to uncertainties in the stellar evolution physics and nuclear reaction cross sections. A key concept related to stellar yields is the definition of primary and secondary species. A primary specie is one that c ...
... and metallicity. Moreover, there are still large uncertainties in the predicted yields due to uncertainties in the stellar evolution physics and nuclear reaction cross sections. A key concept related to stellar yields is the definition of primary and secondary species. A primary specie is one that c ...
A S R TRATEGY
... the design, the conic constants (negative of the squared eccentricities) of the primary and secondary mirrors were chosen to yield zero third-order spherical aberration and field coma on the focal surface. (This is the Ritchey-Chrétien criterion.) The image quality of a precision optical system like ...
... the design, the conic constants (negative of the squared eccentricities) of the primary and secondary mirrors were chosen to yield zero third-order spherical aberration and field coma on the focal surface. (This is the Ritchey-Chrétien criterion.) The image quality of a precision optical system like ...
Circumstellar dust emission from nearby Solar
... stars (including resolved binaries). These data were previously reduced with older versions of the Herschel software and calibration, and have now been coherently re-reduced with more recent versions. There are 16 new marginal excess sources, and one new detected at δ Pavonis. We find a systematical ...
... stars (including resolved binaries). These data were previously reduced with older versions of the Herschel software and calibration, and have now been coherently re-reduced with more recent versions. There are 16 new marginal excess sources, and one new detected at δ Pavonis. We find a systematical ...
Cosmos
... the fact that the Sun seems to be generating too few of the elusive particles called neutrinos. Some proposed explanations are listed. In Chapter 10 we wonder whether there is enough matter in the universe eventually to stop the recession of distant galaxies, and whether the universe is infinitely o ...
... the fact that the Sun seems to be generating too few of the elusive particles called neutrinos. Some proposed explanations are listed. In Chapter 10 we wonder whether there is enough matter in the universe eventually to stop the recession of distant galaxies, and whether the universe is infinitely o ...
Lokal fulltext - Chalmers Publication Library
... only 1.3 pc (Söderhjelm 1999) where the primary star is sometimes considered a solar twin. Simulations have shown that planetary formation is possible here despite its binary nature (see Chapter 3). The higher than normal metallicity of both stars is also in favour of existing planetary systems (Ma ...
... only 1.3 pc (Söderhjelm 1999) where the primary star is sometimes considered a solar twin. Simulations have shown that planetary formation is possible here despite its binary nature (see Chapter 3). The higher than normal metallicity of both stars is also in favour of existing planetary systems (Ma ...
Introduction
... this world of ours. For the atoms being infinite in number, as was already proven, (...) there nowhere exists an obstacle to the infinite number of worlds”. But his point of view was not commonly shared, as for instance by the philosopher Aristotle (384-322 B.C.) who claimed “There cannot be more wo ...
... this world of ours. For the atoms being infinite in number, as was already proven, (...) there nowhere exists an obstacle to the infinite number of worlds”. But his point of view was not commonly shared, as for instance by the philosopher Aristotle (384-322 B.C.) who claimed “There cannot be more wo ...
LaPalma_telescopes_2008
... A concave paraboloid focuses light to a perfect image on its axis but suffers from coma and astigmatism off axis For long focal ratios (f/4 and greater), in the Newtonian design, this leads to acceptable image quality and is widely used in smaller telescopes For larger apertures a shorter focal rati ...
... A concave paraboloid focuses light to a perfect image on its axis but suffers from coma and astigmatism off axis For long focal ratios (f/4 and greater), in the Newtonian design, this leads to acceptable image quality and is widely used in smaller telescopes For larger apertures a shorter focal rati ...
Earth Centered Universe Pro V6.0
... sell or give away the previous version of the Software. If used on a network, provisions must be made to restrict simultaneous use of the Software to the number of copies purchased or to abide by the terms of a separate site license agreement or license certificate. Reasonable backup copies are perm ...
... sell or give away the previous version of the Software. If used on a network, provisions must be made to restrict simultaneous use of the Software to the number of copies purchased or to abide by the terms of a separate site license agreement or license certificate. Reasonable backup copies are perm ...
Lecture 3 - University of Washington
... flocculent (fluffy) spirals with many small short globally uncorrelated spiral arms ...
... flocculent (fluffy) spirals with many small short globally uncorrelated spiral arms ...
Modeling the Spectral Energy Distributions and Variability
... • Association with star-forming region, similarities of some optical light curves and spectra with type Ic supernovae provided strong support for hypernova/collapsar model for long GRBs ...
... • Association with star-forming region, similarities of some optical light curves and spectra with type Ic supernovae provided strong support for hypernova/collapsar model for long GRBs ...
Can we account for the dust
... Mid- and far-IR emission of galaxies ◦ Thermal emission from dust grains ...
... Mid- and far-IR emission of galaxies ◦ Thermal emission from dust grains ...
gerard peter kuiper - National Academy of Sciences
... Succeeding his long-time friend Otto Struve, Kuiper became director of Yerkes and McDonald observatories in 1947, a post he occupied for two years and then resumed in 1957. His thoughts were returning to the origin of the solar system, as he described in the Kepler Medal discourse in 1971: I felt th ...
... Succeeding his long-time friend Otto Struve, Kuiper became director of Yerkes and McDonald observatories in 1947, a post he occupied for two years and then resumed in 1957. His thoughts were returning to the origin of the solar system, as he described in the Kepler Medal discourse in 1971: I felt th ...
Galileo, my first term paper
... turned his telescope on the night sky and began to make remarkable discoveries. In about two months he made more discoveries that changed the world than anyone has ever made before or since. ...
... turned his telescope on the night sky and began to make remarkable discoveries. In about two months he made more discoveries that changed the world than anyone has ever made before or since. ...
Cold galaxies at low and high z
... •1965 first extragalactic X-ray source (M87, Byram, rocket) •1970 Uhuru X-ray satellite maps sky at 2-20 KeV many subsequent X-ray missions, through to Chandra and XMM, both launched in 1999 (Paul Nandra and Ioannis Georgantopoulos will talk about these) Sept 27th 2008 ...
... •1965 first extragalactic X-ray source (M87, Byram, rocket) •1970 Uhuru X-ray satellite maps sky at 2-20 KeV many subsequent X-ray missions, through to Chandra and XMM, both launched in 1999 (Paul Nandra and Ioannis Georgantopoulos will talk about these) Sept 27th 2008 ...
PDF Manual
... make absolutely sure you have no other libraries with the same IDs installed. Even if you do not install the RNGC libraries or QVSOP, parts of AARes and Urania will try to access commands in the libraries with the respective numbers and will fail if they execute commands in libraries not from the Ur ...
... make absolutely sure you have no other libraries with the same IDs installed. Even if you do not install the RNGC libraries or QVSOP, parts of AARes and Urania will try to access commands in the libraries with the respective numbers and will fail if they execute commands in libraries not from the Ur ...
Planet Hunters Education Guide
... the unusual, unlike computers, which will only identify exactly what they have been asked to. This can lead to unexpected discoveries, like in the case of the Galaxy Zoo ‘Green Peas.’ Volunteers were able to identify an entirely new type of galaxy that astronomers didn’t know existed. This galaxy lo ...
... the unusual, unlike computers, which will only identify exactly what they have been asked to. This can lead to unexpected discoveries, like in the case of the Galaxy Zoo ‘Green Peas.’ Volunteers were able to identify an entirely new type of galaxy that astronomers didn’t know existed. This galaxy lo ...
1998 - Universitäts-Sternwarte München
... With the rapidly increased number of observations, the more sophisticated theories, and the very much improved numerical modeling, the last decades saw many distinguished aspects and comprehensive insights into Galactic evolution. Inevitably, and as might have been anticipated, the picture has becom ...
... With the rapidly increased number of observations, the more sophisticated theories, and the very much improved numerical modeling, the last decades saw many distinguished aspects and comprehensive insights into Galactic evolution. Inevitably, and as might have been anticipated, the picture has becom ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
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.