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publictour - LIGO Hanford Observatory
... » LIGO: Laser Interferometer Gravitational Wave Observatory » What kind of computer analysis do you have to do to see a signal? ...
... » LIGO: Laser Interferometer Gravitational Wave Observatory » What kind of computer analysis do you have to do to see a signal? ...
How to Build an Astrolabe - St John`s College, Cambridge
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
How to Build an Astrolabe
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
GALEX and Star Formation
... Massive stars drive the chemical evolution of the Universe, enriching the interstellar medium (ISM) with nucleosynthesis products via supenova explosions and intense mass loss during AGB and planetary nebula phases, and driving the dynamical evolution of the ISM through highly supersonic stellar win ...
... Massive stars drive the chemical evolution of the Universe, enriching the interstellar medium (ISM) with nucleosynthesis products via supenova explosions and intense mass loss during AGB and planetary nebula phases, and driving the dynamical evolution of the ISM through highly supersonic stellar win ...
Chapter 1 Telescopes 1.1 Lenses
... the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars which are point objects and are seen through telescopes as point images no matter how large the mag ...
... the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars which are point objects and are seen through telescopes as point images no matter how large the mag ...
Hubble Diagram Instruction Sheet
... To create a Hubble Diagram, the redshift and velocity of your object is needed, as well as the distance. To find the redshift of an object astronomers use spectroscopy. Spectroscopy is a branch of science that is concerned with the investigation and measurement of the spectrum of light produced when ...
... To create a Hubble Diagram, the redshift and velocity of your object is needed, as well as the distance. To find the redshift of an object astronomers use spectroscopy. Spectroscopy is a branch of science that is concerned with the investigation and measurement of the spectrum of light produced when ...
Ferraro et al. 2006
... similar to OmegaCen • Given its high luminosity (Mv=-9.4) and and half-mass radius (rh=25pc; Bellazzini 2007) NGC2419 lies (together with OmegaCen) Ripepi et al. 2007 in the (rh, MV )plane well above the locus defined by all the other Galactic GCs thus suggesting it might be the stripped core of a f ...
... similar to OmegaCen • Given its high luminosity (Mv=-9.4) and and half-mass radius (rh=25pc; Bellazzini 2007) NGC2419 lies (together with OmegaCen) Ripepi et al. 2007 in the (rh, MV )plane well above the locus defined by all the other Galactic GCs thus suggesting it might be the stripped core of a f ...
CO OBSERVATIONS OF SPIRAL STRUCTURE AND THE LIFETIME
... event would therefore need to supply a momentum of k x 1 0 MQ k m - s or it must ionize k x 1 0 MQ at an average density of 1 0 H nuclei! per cc. Since these requirements far exceed the capabilities of supernova or common 0-stars, the process of removing Hp from clouds is more likely in the form of ...
... event would therefore need to supply a momentum of k x 1 0 MQ k m - s or it must ionize k x 1 0 MQ at an average density of 1 0 H nuclei! per cc. Since these requirements far exceed the capabilities of supernova or common 0-stars, the process of removing Hp from clouds is more likely in the form of ...
Extrasolar Cosmochemistry
... such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has occurred ( Jura et al. 2009). For the DB stars with relatively large outer mixing zones, the mini ...
... such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has occurred ( Jura et al. 2009). For the DB stars with relatively large outer mixing zones, the mini ...
Missions
... The first infrared survey of the sky, performed by Gerry Neugebauer and Robert Leighton – who built their own telescope for the purpose – changed this view completely. The results were published in 1965 and Harwit describes them as “electrifying”: they revealed ten objects that were completely invis ...
... The first infrared survey of the sky, performed by Gerry Neugebauer and Robert Leighton – who built their own telescope for the purpose – changed this view completely. The results were published in 1965 and Harwit describes them as “electrifying”: they revealed ten objects that were completely invis ...
Introduction
... planet-star interactions can induce larger orbital eccentricities and inclinations to the stellar rotation plane. The sky-projected planet orbital inclination and the sky-projected inclination between the stellar spin and the planet’s orbit rotation axis, have been measured for some exoplanets. With ...
... planet-star interactions can induce larger orbital eccentricities and inclinations to the stellar rotation plane. The sky-projected planet orbital inclination and the sky-projected inclination between the stellar spin and the planet’s orbit rotation axis, have been measured for some exoplanets. With ...
Measuring distances to the edge of the local group
... caused by the radial pulsation of the star, which was first characterized by Leavitt in 1912. They can thus be used as standard candles once the period of a particular star is known. To accomplish this, we plan to take six observations of the three galaxies, with a spacing of 4-5 nights between obse ...
... caused by the radial pulsation of the star, which was first characterized by Leavitt in 1912. They can thus be used as standard candles once the period of a particular star is known. To accomplish this, we plan to take six observations of the three galaxies, with a spacing of 4-5 nights between obse ...
October, 2014 - Mahoning Valley Astronomical Society
... comet will complete more than 1/2 rotation during the descent; P67’s rotation rate is 12.4 hours. Philae has 12 different instruments on board. One is called CONSERT which will bounce low-frequency waves through its center, creating the first-ever image of a comet nucleus. Another instrument is APXS ...
... comet will complete more than 1/2 rotation during the descent; P67’s rotation rate is 12.4 hours. Philae has 12 different instruments on board. One is called CONSERT which will bounce low-frequency waves through its center, creating the first-ever image of a comet nucleus. Another instrument is APXS ...
Course Outline - Tony Bacigalupo
... light curves Periods range from 0.5 to 1 day Lie at the bottom of the instability strip ...
... light curves Periods range from 0.5 to 1 day Lie at the bottom of the instability strip ...
Altair -- the ``hottest`` magnetically active star in X-rays
... be attributed to systematic and measurement errors or indicate different “physical” periods remains uncertain, yet the derived periods of Altair are close to each other, supporting that rotational modulated X-ray emission is indeed present during the observation. The absence of larger or even moderat ...
... be attributed to systematic and measurement errors or indicate different “physical” periods remains uncertain, yet the derived periods of Altair are close to each other, supporting that rotational modulated X-ray emission is indeed present during the observation. The absence of larger or even moderat ...
Reassessing the formation of the inner Oort cloud
... For most embedded clusters, the observed surface density is a constant (Allen et al., 2007) i.e. N/R2 is constant, where R is the radius of the cluster. This relation is in agreement with the observed density structure of giant molecular clouds (Blitz et al., 2007) and theoretical modelling of cloud ...
... For most embedded clusters, the observed surface density is a constant (Allen et al., 2007) i.e. N/R2 is constant, where R is the radius of the cluster. This relation is in agreement with the observed density structure of giant molecular clouds (Blitz et al., 2007) and theoretical modelling of cloud ...
EVALUATION OF FINNIS+ ASTRONOM<
... Academy of Finland decided to follow the suggestion by the Finnish Science and Technology Policy Council that Finnish astronomy should be evaluated. Since joining the European Union and European Space Agency (ESA) in 1995, Finland has been systematically participating in projects of European scienti ...
... Academy of Finland decided to follow the suggestion by the Finnish Science and Technology Policy Council that Finnish astronomy should be evaluated. Since joining the European Union and European Space Agency (ESA) in 1995, Finland has been systematically participating in projects of European scienti ...
Mass loss of massive stars near the Eddington luminosity by core
... before the core collapse by chance. However, we suggest that, if a SN progenitor is near the Eddington luminosity from several years before the core collapse, the star is not required to be LBVs to enhance the mass loss. The sudden luminosity increase observed in some Type IIn SNe in ∼years to ∼10 d ...
... before the core collapse by chance. However, we suggest that, if a SN progenitor is near the Eddington luminosity from several years before the core collapse, the star is not required to be LBVs to enhance the mass loss. The sudden luminosity increase observed in some Type IIn SNe in ∼years to ∼10 d ...
A New Science Strategy for Space Astronomy and Astrophysics
... NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee ...
... NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee ...
ASTRONOMIA SPAIN inglés.qxd
... electrons supports the mechanical structure of white dwarfs. The second fact that was known is that a simple cooling process could describe the evolution of this type of star. Both facts were fully established and widely accepted by the astronomical community. However, we had very few good quality o ...
... electrons supports the mechanical structure of white dwarfs. The second fact that was known is that a simple cooling process could describe the evolution of this type of star. Both facts were fully established and widely accepted by the astronomical community. However, we had very few good quality o ...
Teil 2
... orbital motion, i.e., they appear centred at the central meridian during the respective quadrature phases, thus are not facing each other as would be the case for a hypothetical reflection effect. The leading hemispheres on both components appear with an effectively lower temperature than the traili ...
... orbital motion, i.e., they appear centred at the central meridian during the respective quadrature phases, thus are not facing each other as would be the case for a hypothetical reflection effect. The leading hemispheres on both components appear with an effectively lower temperature than the traili ...
The chemical composition of solar-type stars and its impact on the
... iron abundance [Fe/H] is often used as an approximation for the overall metallicity in a star. It is common to use the unit dex in this context to account for logarithmic values. Since we use the logarithm to base ten, one dex stands for one order of magnitude. ...
... iron abundance [Fe/H] is often used as an approximation for the overall metallicity in a star. It is common to use the unit dex in this context to account for logarithmic values. Since we use the logarithm to base ten, one dex stands for one order of magnitude. ...
Hipparcos
![](https://commons.wikimedia.org/wiki/Special:FilePath/Hipparcos-testing-estec.jpg?width=300)
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.