Differential measurement of atmospheric
... astrometry is how to establish more reasonable atmospheric refraction models and how to improve the correction accuracy of atmospheric refraction. With the continuous release of high-precision star catalogs, the method of relative celestial positioning based on photographic technique can effectively ...
... astrometry is how to establish more reasonable atmospheric refraction models and how to improve the correction accuracy of atmospheric refraction. With the continuous release of high-precision star catalogs, the method of relative celestial positioning based on photographic technique can effectively ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... The Urantia Book is probably referring here to the Hale (Mt Palomar) telescope, which went into operation in 1948. The figure 375 million thus refers to the additional new galaxies observable when the Hale telescope was put into operation, not the number of galaxies in the master universe. Recently ...
... The Urantia Book is probably referring here to the Hale (Mt Palomar) telescope, which went into operation in 1948. The figure 375 million thus refers to the additional new galaxies observable when the Hale telescope was put into operation, not the number of galaxies in the master universe. Recently ...
Instruction Manual #11007 / #11008 / #11009 ®
... CPC Computerized mount with its new EdgeHD optical system. The CPC series uses GPS (Global Positioning System) technology to take the guesswork and effort out of aligning and finding celestial objects in the sky. Simple and easy to use, the CPC with its SkyAlign sky modeling system, is up and runnin ...
... CPC Computerized mount with its new EdgeHD optical system. The CPC series uses GPS (Global Positioning System) technology to take the guesswork and effort out of aligning and finding celestial objects in the sky. Simple and easy to use, the CPC with its SkyAlign sky modeling system, is up and runnin ...
We Do Not Forget Johannes Kepler Introduction
... new era in human exploration and understanding the nature. In Astronomia Nova Kepler described the rst two of his laws of planetary motion, which were discovered few years earlier, during his careful calculation of the orbit of Mars. He became therefore the founder of celestial mechanics and author ...
... new era in human exploration and understanding the nature. In Astronomia Nova Kepler described the rst two of his laws of planetary motion, which were discovered few years earlier, during his careful calculation of the orbit of Mars. He became therefore the founder of celestial mechanics and author ...
Confirmation of Hostless Type Ia Supernovae Using Hubble Space
... a globular cluster (GC) or faint dwarf galaxy. We estimate the local surface densities of GCs and dwarfs to show that a GC is more likely, due to the proximity of an elliptical galaxy, but neither can be ruled out. This faint host implies that the SN Ia rate in dwarfs or GCs may be enhanced, but rem ...
... a globular cluster (GC) or faint dwarf galaxy. We estimate the local surface densities of GCs and dwarfs to show that a GC is more likely, due to the proximity of an elliptical galaxy, but neither can be ruled out. This faint host implies that the SN Ia rate in dwarfs or GCs may be enhanced, but rem ...
Multiwavelength observations of XTE J1118+480`s outburst
... X-RAY BINARIES X-ray binary: binary system containing a compact object (neutron star or stellar-mass black hole) accreting matter from the companion star. Accreted matter carries angular momentum and on its way to the compact object usually forms an accretion disk, responsible for the X-ray emissio ...
... X-RAY BINARIES X-ray binary: binary system containing a compact object (neutron star or stellar-mass black hole) accreting matter from the companion star. Accreted matter carries angular momentum and on its way to the compact object usually forms an accretion disk, responsible for the X-ray emissio ...
Astronomy
... result in a cascade of particles which can be detected by current observatories.[38] Additionally, some future neutrino detectors may also be sensitive to the particles produced when cosmic rays hit the Earth's atmosphere.[33] Gravitational wave astronomy is an emerging new field of astronomy which ...
... result in a cascade of particles which can be detected by current observatories.[38] Additionally, some future neutrino detectors may also be sensitive to the particles produced when cosmic rays hit the Earth's atmosphere.[33] Gravitational wave astronomy is an emerging new field of astronomy which ...
The physics of line-driven winds of hot massive stars
... In idealized circumstances, the initial conditions of the evolution completely determine the path the star takes. If the star does not form together with a companion, its mass, angular momentum and chemical composition fully specify what will happen to the star over time. The mass is a dominant para ...
... In idealized circumstances, the initial conditions of the evolution completely determine the path the star takes. If the star does not form together with a companion, its mass, angular momentum and chemical composition fully specify what will happen to the star over time. The mass is a dominant para ...
Document
... a distance of 0.7 AU away from a Sun-like star, would be habitable. They also determined that an Earth-like planet rotating at a rate of 1 rotation/day required half the stellar flux compared to an Earth-like planet rotating at a rate of 1 rotation/243 days to maintain an Earth-like climate. The pla ...
... a distance of 0.7 AU away from a Sun-like star, would be habitable. They also determined that an Earth-like planet rotating at a rate of 1 rotation/day required half the stellar flux compared to an Earth-like planet rotating at a rate of 1 rotation/243 days to maintain an Earth-like climate. The pla ...
Structure of Hot Molecular Cores
... 3.7 Modeling procedure: Lines . . . . . . . . . . . . . . . . 3.7.1 Line radiative transfer . . . . . . . . . . . . . . 3.7.2 Fitting strategy . . . . . . . . . . . . . . . . . . 3.7.3 The ’final’ model . . . . . . . . . . . . . . . . . 3.8 Modeling results . . . . . . . . . . . . . . . . . . . . . ...
... 3.7 Modeling procedure: Lines . . . . . . . . . . . . . . . . 3.7.1 Line radiative transfer . . . . . . . . . . . . . . 3.7.2 Fitting strategy . . . . . . . . . . . . . . . . . . 3.7.3 The ’final’ model . . . . . . . . . . . . . . . . . 3.8 Modeling results . . . . . . . . . . . . . . . . . . . . . ...
Combined Earth-/Star-Sensor for Attitude and Orbit Determination of
... system is characterized by two non-collinear lines-of-sight, which are combined by a beam splitter which as well provides attenuation of the Earth’s magnitude. Hereby images of a Star-field, perpendicular to the Earth vector, and the Earth are projected on a single focal plane thereby merging the fu ...
... system is characterized by two non-collinear lines-of-sight, which are combined by a beam splitter which as well provides attenuation of the Earth’s magnitude. Hereby images of a Star-field, perpendicular to the Earth vector, and the Earth are projected on a single focal plane thereby merging the fu ...
Abd al-Rahman al-Sufi and his book of the fixed stars: a journey of
... “A really correct and reliable edition, with reproductions of the drawings in the original shape, using some of the oldest extant manuscripts remains a desideratum,” (Kunitzsch, 1989). This was what Professor Paul Kunitzsch wrote when he was describing one of the most important books in the history ...
... “A really correct and reliable edition, with reproductions of the drawings in the original shape, using some of the oldest extant manuscripts remains a desideratum,” (Kunitzsch, 1989). This was what Professor Paul Kunitzsch wrote when he was describing one of the most important books in the history ...
Parallax
... terrestrial objects, people only knew or noticed three celestial objects: the Sun, the Moon and the stars. Later on, the wonder about the sky and all the things outside our Earth made people to observe carefully and realized another type of celestial objects: planet, which is very like the stars but ...
... terrestrial objects, people only knew or noticed three celestial objects: the Sun, the Moon and the stars. Later on, the wonder about the sky and all the things outside our Earth made people to observe carefully and realized another type of celestial objects: planet, which is very like the stars but ...
Mapping of the extinction in giant molecular clouds using optical star
... of reflection nebulae that prevent source extraction. In Fig. 11 the well known Orion constellation is drawn over the map and the brighter stars appear. Ori (Alnilam) the central star of the constellation, free of any reflection nebula, is represented by a disc of ∼ 140 for a magnitude of mV = 1.7 ...
... of reflection nebulae that prevent source extraction. In Fig. 11 the well known Orion constellation is drawn over the map and the brighter stars appear. Ori (Alnilam) the central star of the constellation, free of any reflection nebula, is represented by a disc of ∼ 140 for a magnitude of mV = 1.7 ...
Super-Eddington outburst in a binary system: V4641 Sgr Mikhail Revnivtsev, Marat Gilfanov
... the contribution of the accretion disk • It is common for X-ray Novae to demonstrate ∆mv ∼ 5. But only if the X-ray Nova is the low mass X-ray binary ! Such huge change of the optical brightness was never observed in high mass systems • What is the difference? Super-Eddington outburst in a binary sy ...
... the contribution of the accretion disk • It is common for X-ray Novae to demonstrate ∆mv ∼ 5. But only if the X-ray Nova is the low mass X-ray binary ! Such huge change of the optical brightness was never observed in high mass systems • What is the difference? Super-Eddington outburst in a binary sy ...
Optical interferometry in astronomy
... be diffraction-limited by the primary mirror, but rather by the coherence scale of the incoming wavefront. The transverse distance over which one expects rms pathlength difference to be λ/2.4 has been defined as the Fried parameter and is denoted by r0 (λ) (Fried 1965); hence telescope apertures larg ...
... be diffraction-limited by the primary mirror, but rather by the coherence scale of the incoming wavefront. The transverse distance over which one expects rms pathlength difference to be λ/2.4 has been defined as the Fried parameter and is denoted by r0 (λ) (Fried 1965); hence telescope apertures larg ...
Untitled - METU Astrophysics Home Page
... The possibility of the existence of neutron stars first came to be with the discovery of the neutrons by Chadwick in 1930s. Afterwards, one of the first ideas regarding their formation was proposed in the work of Baade and Zwicky in 1934, whom foreseen the likelihood of neutron stars’ birth in super ...
... The possibility of the existence of neutron stars first came to be with the discovery of the neutrons by Chadwick in 1930s. Afterwards, one of the first ideas regarding their formation was proposed in the work of Baade and Zwicky in 1934, whom foreseen the likelihood of neutron stars’ birth in super ...
Gamma Ray Bursts
... Diversity of pulse shapes well explained by diversity of shapes and sizes of comets. Neutron stars are inside galactic disk. How to get isotropic distribution? Possible, if we see only nearby neutron stars. Having the number of neutron stars (from pulsar observations and supernovae) and the numer of ...
... Diversity of pulse shapes well explained by diversity of shapes and sizes of comets. Neutron stars are inside galactic disk. How to get isotropic distribution? Possible, if we see only nearby neutron stars. Having the number of neutron stars (from pulsar observations and supernovae) and the numer of ...
Colour-magnitude diagrams of the post
... presence of a blue HB is made more clear in Fig. 3c where essentially no blue MS contamination is seen, and stars in the locus of the blue HB are still seen. A quantitative check of the presence of an HB was carried out by counting stars in frames with different apertures around the cluster center. ...
... presence of a blue HB is made more clear in Fig. 3c where essentially no blue MS contamination is seen, and stars in the locus of the blue HB are still seen. A quantitative check of the presence of an HB was carried out by counting stars in frames with different apertures around the cluster center. ...