ESA ACHIEVEMENTS
... Eumetsat. The ECS communications satellites led to Framework Agreement essential for joint activities. The joint Space Council set Eutelsat, and the Marecs maritime satellites were vitally up by this Framework Agreement held its inaugural meeting in November 2004, important to Inmarsat. These are al ...
... Eumetsat. The ECS communications satellites led to Framework Agreement essential for joint activities. The joint Space Council set Eutelsat, and the Marecs maritime satellites were vitally up by this Framework Agreement held its inaugural meeting in November 2004, important to Inmarsat. These are al ...
Legends Night Sky Orion
... reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and astronomers made up in order to help predict seasons and even save their very lives. - This occurred ...
... reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and astronomers made up in order to help predict seasons and even save their very lives. - This occurred ...
Correcting Systematic Poalrization Effects in Keck LRISp
... Stokes parameters using only four measurements or pursue less redundant but more efficient schemes (de Wijn et al. 2010; del Toro Iniesta & Collados 2000; Tomczyk et al. 2010; Snik et al. 2012, 2009; Nagaraju et al. 2007; Keil et al. 2011; Elmore et al. 2010, 1992). For instance, one can use alternate ...
... Stokes parameters using only four measurements or pursue less redundant but more efficient schemes (de Wijn et al. 2010; del Toro Iniesta & Collados 2000; Tomczyk et al. 2010; Snik et al. 2012, 2009; Nagaraju et al. 2007; Keil et al. 2011; Elmore et al. 2010, 1992). For instance, one can use alternate ...
Giant star seismology
... with the Kepler space telescope is shown in the top panel of Fig. 1. There are significant differences between intensity and RV variation measurements in the sense of their sensitivity to other intrinsic stellar features. For example, granulation (the visible effect of convection at a star’s surface ...
... with the Kepler space telescope is shown in the top panel of Fig. 1. There are significant differences between intensity and RV variation measurements in the sense of their sensitivity to other intrinsic stellar features. For example, granulation (the visible effect of convection at a star’s surface ...
Book Describing Techniques to Detect Transiting ExoPlanets
... Not only are amateurs capable of helping in the discovery of exoplanets through collaborations with professionals, but amateurs are well-positioned to contribute to the discovery of Earth-like exoplanets and their moons! This is explained in Chapter 22. How can this be? After all, the professionals ...
... Not only are amateurs capable of helping in the discovery of exoplanets through collaborations with professionals, but amateurs are well-positioned to contribute to the discovery of Earth-like exoplanets and their moons! This is explained in Chapter 22. How can this be? After all, the professionals ...
SEASONAL DATING OF SAPPHO`S `MIDNIGHT POEM` REVISITED
... During our investigation we could not establish precisely what type of time-keeping device was used on Lesbos around 570 BC., although we assumed that it was the clepsydra (water clock). Simple outflow clepsydra certainly were in use in Athens in the fourth century BC (Landels, 1979), and in other p ...
... During our investigation we could not establish precisely what type of time-keeping device was used on Lesbos around 570 BC., although we assumed that it was the clepsydra (water clock). Simple outflow clepsydra certainly were in use in Athens in the fourth century BC (Landels, 1979), and in other p ...
Educator`s Guide
... reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and astronomers made up in order to help predict seasons and even save their very lives. - This occurred ...
... reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and astronomers made up in order to help predict seasons and even save their very lives. - This occurred ...
Turbulence-driven Polar Winds from T Tauri Stars Energized by
... What sets the Sun’s mass loss? • Coronal heating must be ultimately responsible for the solar wind. • A fraction of the “coronal heating” is channeled downward by conduction. • Hammer (1982) & Withbroe (1988) suggested a balance between conduction (downward), enthalpy (upward), and radiation losses ...
... What sets the Sun’s mass loss? • Coronal heating must be ultimately responsible for the solar wind. • A fraction of the “coronal heating” is channeled downward by conduction. • Hammer (1982) & Withbroe (1988) suggested a balance between conduction (downward), enthalpy (upward), and radiation losses ...
PDF only - at www.arxiv.org.
... higher sensitivity. Together with a larger collecting area compared to Herschel observations of dedicated solar longitudes over a full martian year would provide for the first time vertical H2O2 profiles and in a unique way constrain photochemical models. Other important species are ...
... higher sensitivity. Together with a larger collecting area compared to Herschel observations of dedicated solar longitudes over a full martian year would provide for the first time vertical H2O2 profiles and in a unique way constrain photochemical models. Other important species are ...
HH 222: A Giant Herbig-Haro Flow from the
... HH 222 was observed with the echelle spectrograph at the 3.5 meter Apache Point Observatory on the nights of 21 and 22 November 2002. This cross-dispersed spectrograph has a resolution of about 32,000 and around the Hα and [SII] doublet has a dispersion of 0.0814 A pix−1 (3.69 km s−1 pix−1 ) and 0.0 ...
... HH 222 was observed with the echelle spectrograph at the 3.5 meter Apache Point Observatory on the nights of 21 and 22 November 2002. This cross-dispersed spectrograph has a resolution of about 32,000 and around the Hα and [SII] doublet has a dispersion of 0.0814 A pix−1 (3.69 km s−1 pix−1 ) and 0.0 ...
VIPNET NEWS T The Annular Solar Eclipse January 15, 2010
... International Year of Astronomy 2009 general. The path of the annular eclipse passes over the Maldives at around 07:24 UT), here the eclipse path is down to 328km wide, but the duration will be almost 11 minutes on the centreline. The track next reaches India; although the centreline just misses th ...
... International Year of Astronomy 2009 general. The path of the annular eclipse passes over the Maldives at around 07:24 UT), here the eclipse path is down to 328km wide, but the duration will be almost 11 minutes on the centreline. The track next reaches India; although the centreline just misses th ...
The universe of the coming ALMA revolution
... Millimeter-wavelength light is a “sweet spot” for tomorrow’s astronomy because… It’s what half the light is. In addition to the cosmic microwave background (a nearly uniform glow from every part in the sky), the universe emits most of its light in two broad “humps” of color. We’ve been studying the ...
... Millimeter-wavelength light is a “sweet spot” for tomorrow’s astronomy because… It’s what half the light is. In addition to the cosmic microwave background (a nearly uniform glow from every part in the sky), the universe emits most of its light in two broad “humps” of color. We’ve been studying the ...
CPW
... repel, not a^ract each other. If you did not know that like charges repel, you sAll could have go^en B over A, since if it were true that like charges a^racted each other, high pressure wo ...
... repel, not a^ract each other. If you did not know that like charges repel, you sAll could have go^en B over A, since if it were true that like charges a^racted each other, high pressure wo ...
NICMOS Coronagraphic Observations of 55 Cancri
... replaced in the count-rate images by 2D Gaussian weighted interpolation of neighbor pixels with radii appropriate for the wavelengths of the different filters. Each reduced set of images with the same target, filter and orientation were then median combined into a single image. Known artifacts induc ...
... replaced in the count-rate images by 2D Gaussian weighted interpolation of neighbor pixels with radii appropriate for the wavelengths of the different filters. Each reduced set of images with the same target, filter and orientation were then median combined into a single image. Known artifacts induc ...
The old globular cluster system of the dIrr galaxy NGC 1427A in the
... the original images. This was done with a ring aperture median filtering on images from which bright objects had been previously subtracted. A smoothing kernel of 41 pixels radius proved to give the best results, i.e., the wings of the bright, well-exposed stars were not affected. This was confirmed ...
... the original images. This was done with a ring aperture median filtering on images from which bright objects had been previously subtracted. A smoothing kernel of 41 pixels radius proved to give the best results, i.e., the wings of the bright, well-exposed stars were not affected. This was confirmed ...
Multiplicity in Early Stellar Evolution - Astronomy Group
... thus not the simulations of choice for following binary formation. Hennebelle et al. (2011) followed the collapse of a 100-M⊙ cloud with their AMR MHD code, and found that the magnetic field could reduce the degree of fragmentation, compared to a nonmagnetic cloud collapse, by as much as a factor of ...
... thus not the simulations of choice for following binary formation. Hennebelle et al. (2011) followed the collapse of a 100-M⊙ cloud with their AMR MHD code, and found that the magnetic field could reduce the degree of fragmentation, compared to a nonmagnetic cloud collapse, by as much as a factor of ...
The Origin and Evolution of Dust in Galaxies
... LMC star formation depends on the large reservoir of existing ISM gas The LMC is getting gas poorer. The SFR is likely to be declining with time. Chemical evolution of the LMC ISM is very slow process (~1 Gyrs) – ISM gas : 8x108 Msun (HI + H2) = Gas injection rate (0.03-0.08 Msun yr-1) x 1 Grys ...
... LMC star formation depends on the large reservoir of existing ISM gas The LMC is getting gas poorer. The SFR is likely to be declining with time. Chemical evolution of the LMC ISM is very slow process (~1 Gyrs) – ISM gas : 8x108 Msun (HI + H2) = Gas injection rate (0.03-0.08 Msun yr-1) x 1 Grys ...
Prospects for asteroseismic inference on the envelope helium
... results can be obtained simply by fitting a constant offset to the second differences in addition to the oscillatory term caused by the glitch. Furthermore, the second differences are less susceptible to the propagation of uncertainties in mode frequencies than higher order differences. When determi ...
... results can be obtained simply by fitting a constant offset to the second differences in addition to the oscillatory term caused by the glitch. Furthermore, the second differences are less susceptible to the propagation of uncertainties in mode frequencies than higher order differences. When determi ...
Lecture 3 - University of Washington
... • Earlier (1930’s) suggested by Fritz Zwicky, became an accepted view after Rubin’s work • While, in principle, this discrepancy could also be due to a different gravitational law (i.e. force that is not ∝ 1/R2), the modern data, including cosmic microwave background measurements, suggest that indee ...
... • Earlier (1930’s) suggested by Fritz Zwicky, became an accepted view after Rubin’s work • While, in principle, this discrepancy could also be due to a different gravitational law (i.e. force that is not ∝ 1/R2), the modern data, including cosmic microwave background measurements, suggest that indee ...
NexStar GT - Celestron
... observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have fully mastered your telescope’s operation. The NexStar hand control has built-in instructions to guide you through all the alignment procedures needed to have the telescope up and running in ...
... observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have fully mastered your telescope’s operation. The NexStar hand control has built-in instructions to guide you through all the alignment procedures needed to have the telescope up and running in ...
LIGO | Hanford
... What’s next? Advanced LIGO… Major technological differences between LIGO and Advanced LIGO ...
... What’s next? Advanced LIGO… Major technological differences between LIGO and Advanced LIGO ...
![Neutral material around the B[e] supergiant star LHA 115](http://s1.studyres.com/store/data/015508749_1-459b4c864ff7fdb1bc1eff2b9c6df4c4-300x300.png)
Neutral material around the B[e] supergiant star LHA 115
... [Oi] lines. This neutral material is most plausibly located within their dense, cool circumstellar disks, which are formed from the (probably non-spherically symmetric) wind material released by the star. Neither the formation mechanism nor the resulting structure and internal kinematics of these di ...
... [Oi] lines. This neutral material is most plausibly located within their dense, cool circumstellar disks, which are formed from the (probably non-spherically symmetric) wind material released by the star. Neither the formation mechanism nor the resulting structure and internal kinematics of these di ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.