A Zoo of Galaxies
... To say our understanding of the “zoo” of galaxies that are found in our Universe has changed a lot over the last century or two is a bit of an understatement. In 1845 the state of the art picture of an external galaxy, was an image of M51, or the Whirlpool galaxy drawn by William Parsons, Third Earl ...
... To say our understanding of the “zoo” of galaxies that are found in our Universe has changed a lot over the last century or two is a bit of an understatement. In 1845 the state of the art picture of an external galaxy, was an image of M51, or the Whirlpool galaxy drawn by William Parsons, Third Earl ...
Brochure - Institut für Raumfahrtsysteme
... have not yet approached the inner Solar System. Thus, some comets may still reflect the original composition of the presolar cloud. The interplanetary probes Giotto, VeGa1 and VeGa 2, ICE, Deep Space 1, Stardust, and Deep Impact investigated several different comets. They found that cometary materia ...
... have not yet approached the inner Solar System. Thus, some comets may still reflect the original composition of the presolar cloud. The interplanetary probes Giotto, VeGa1 and VeGa 2, ICE, Deep Space 1, Stardust, and Deep Impact investigated several different comets. They found that cometary materia ...
The Hubble Space Telescope Optical Systems Failure Report
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
The Hubble Space Telescope Optical Systems Failure Report
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
Principles, Limitations and Performance of Multi
... phase may be dierent: Imagine that there are two turbulent layers at 0 and h km with identical sine wave aberrations of period l, and that there are two NGSs, one on-axis and one o-axis by some angle . If the atmosphere was to produce sine waves with a period l = h, the pair of NGS would see exa ...
... phase may be dierent: Imagine that there are two turbulent layers at 0 and h km with identical sine wave aberrations of period l, and that there are two NGSs, one on-axis and one o-axis by some angle . If the atmosphere was to produce sine waves with a period l = h, the pair of NGS would see exa ...
A Zoo of Galaxies - Cambridge University Press
... the first example of such a map based on actual astronomical data. By 1900 astronomers understood quite a lot more about the basic structure of our galaxy. The map made by Cornelius Easton in 1900 (Fig 3) was the first to show our galaxy as having spiral structures (Trimble 1995). Easton used pictures ...
... the first example of such a map based on actual astronomical data. By 1900 astronomers understood quite a lot more about the basic structure of our galaxy. The map made by Cornelius Easton in 1900 (Fig 3) was the first to show our galaxy as having spiral structures (Trimble 1995). Easton used pictures ...
Document
... Gaia’s mission is to create the most accurate map of the Galaxy to date. To do this, Gaia is observing about one billion stars, roughly one per cent of the total stellar content of the Milky Way. Eventually, this detailed inventory will include the positions and motions of stars to unprecedented pre ...
... Gaia’s mission is to create the most accurate map of the Galaxy to date. To do this, Gaia is observing about one billion stars, roughly one per cent of the total stellar content of the Milky Way. Eventually, this detailed inventory will include the positions and motions of stars to unprecedented pre ...
Operating Manual
... Congratulations and thank you for buying one of Santa Barbara Instrument Group's CCD cameras. The model ST-7E, ST-8E, ST-9E, ST-10E and ST-1001E are SBIG's fourth generation CCD cameras and represent the state of the art in CCD camera systems with their low noise and advanced capabilities, including ...
... Congratulations and thank you for buying one of Santa Barbara Instrument Group's CCD cameras. The model ST-7E, ST-8E, ST-9E, ST-10E and ST-1001E are SBIG's fourth generation CCD cameras and represent the state of the art in CCD camera systems with their low noise and advanced capabilities, including ...
Radio pulsars
... • Optimised for MSPs: tobs = 4 min, tsamp = 125 ms. • 14 pulsars discovered so far, including 4 MSPs ...
... • Optimised for MSPs: tobs = 4 min, tsamp = 125 ms. • 14 pulsars discovered so far, including 4 MSPs ...
The Milky Way`s external disc constrained by 2MASS star counts
... In recent years wide surveys have been obtained thanks to widefield mosaic of CCD cameras and helped by the availability of dedicated telescopes both from the ground and from space. These large data sets benefit Galactic structure studies; however, interstellar extinction remains a serious obstacle ...
... In recent years wide surveys have been obtained thanks to widefield mosaic of CCD cameras and helped by the availability of dedicated telescopes both from the ground and from space. These large data sets benefit Galactic structure studies; however, interstellar extinction remains a serious obstacle ...
Orion the Hunter
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
Multiwavelength observations of XTE J1118+480`s outburst
... 30% of sources detected by INTEGRAL/IBIS were not known. 80% of Norma sources are X-ray pulsars, high spin periods Spectra typical of neutron stars No radio emission 85% of sources are highly absorbed (X-ray observations): column density NH>1023 cm-2 X-ray absorption >> IR => absorbing matter local ...
... 30% of sources detected by INTEGRAL/IBIS were not known. 80% of Norma sources are X-ray pulsars, high spin periods Spectra typical of neutron stars No radio emission 85% of sources are highly absorbed (X-ray observations): column density NH>1023 cm-2 X-ray absorption >> IR => absorbing matter local ...
FY96
... Astrophysical Journal Letters of 10 March 1996, Majewski, J. Munn (U. of Chicago), and S. Hawley (Michigan State U.) report on Hydra multi-fiber spectroscopy of the NGP field. They obtained over 200 new radial velocities for stars with previously measured proper motions with distances out to 8 kilop ...
... Astrophysical Journal Letters of 10 March 1996, Majewski, J. Munn (U. of Chicago), and S. Hawley (Michigan State U.) report on Hydra multi-fiber spectroscopy of the NGP field. They obtained over 200 new radial velocities for stars with previously measured proper motions with distances out to 8 kilop ...
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 ...
RTICC Rapid Terrestrial Imaging CubeSat Constellation
... reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the number of planes. The number of spacecraft per plane is reduced if the spacecraft a ...
... reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the number of planes. The number of spacecraft per plane is reduced if the spacecraft a ...
The Physics and Chemistry of Nebular Evolution
... of meteorites and astronomical observations of comets demonstrate that the actual evolution was much more complicated. Protoplanetary disks are known to evolve by transfering mass inward where it is accreted by the central stars, resulting in the disks cooling and becoming less dense over time. Supe ...
... of meteorites and astronomical observations of comets demonstrate that the actual evolution was much more complicated. Protoplanetary disks are known to evolve by transfering mass inward where it is accreted by the central stars, resulting in the disks cooling and becoming less dense over time. Supe ...
exoplanet observing for amateurs
... the best planned observing session. Only through experience with one particular observing system can these pitfalls be avoided. I therefore encourage the serious observer to plan on a long period of floundering before serious observing is begun. For example, during the floundering phase try differen ...
... the best planned observing session. Only through experience with one particular observing system can these pitfalls be avoided. I therefore encourage the serious observer to plan on a long period of floundering before serious observing is begun. For example, during the floundering phase try differen ...
Astronomy 113 Laboratory Manual - UW
... exploration. During the 14 lab sessions, we will encounter objects located in our own solar system, stars filling the Milky Way, and objects located much further away in the far reaches of space. Astronomy is an observational science, as opposed to most of the rest of physics, which is experimental ...
... exploration. During the 14 lab sessions, we will encounter objects located in our own solar system, stars filling the Milky Way, and objects located much further away in the far reaches of space. Astronomy is an observational science, as opposed to most of the rest of physics, which is experimental ...
The Oort Cloud
... approach the sun at the very edge of their orbits, and then take off again to distances as much as a hundred thousand times greater than the distance of the Earth from the Sun. As a result these comets spend most of their time far beyond the orbit of the outermost planets, and, if they preserve thei ...
... approach the sun at the very edge of their orbits, and then take off again to distances as much as a hundred thousand times greater than the distance of the Earth from the Sun. As a result these comets spend most of their time far beyond the orbit of the outermost planets, and, if they preserve thei ...
Catch a Comet - Innovative Teachers BG
... became clear that composition of the motes is similar to material of asteroid from the Solar system. It is said, that tails are nothing visible, but they can be watched because of the illumination of the gas and dust. The illumination is connected with the ionization of the gas by the ultraviolet ra ...
... became clear that composition of the motes is similar to material of asteroid from the Solar system. It is said, that tails are nothing visible, but they can be watched because of the illumination of the gas and dust. The illumination is connected with the ionization of the gas by the ultraviolet ra ...
The Legacy of Galileo - Keck Institute for Space Studies
... should be bound to confess your opinion to be true.”7 This was the point, the philosopher and the theologian would have not agreed to change their views based on the experiment if the experimental evidence was against Aristotle’s teachings. The thinking of Galileo, like that of other great scientist ...
... should be bound to confess your opinion to be true.”7 This was the point, the philosopher and the theologian would have not agreed to change their views based on the experiment if the experimental evidence was against Aristotle’s teachings. The thinking of Galileo, like that of other great scientist ...
Polarimetry: a powerful diagnostic tool in astronomy
... show appreciable polarization. For example, synchrotron and cyclotron radiation produce linear and circular polarization respectively. However, it is the polarization produced by material around a star that perhaps provides most current interest. This could be from a protoplanetary disc or a debris ...
... show appreciable polarization. For example, synchrotron and cyclotron radiation produce linear and circular polarization respectively. However, it is the polarization produced by material around a star that perhaps provides most current interest. This could be from a protoplanetary disc or a debris ...
A Search for Extrasolar Planets Using Echoes Produced in Flare
... A detection technique for searching for extrasolar planets using stellar flare events is explored, including a discussion of potential benefits, potential problems, and limitations of the method. The detection technique analyses the observed time verses intensity profile of a star’s energetic flare ...
... A detection technique for searching for extrasolar planets using stellar flare events is explored, including a discussion of potential benefits, potential problems, and limitations of the method. The detection technique analyses the observed time verses intensity profile of a star’s energetic flare ...
Galaxies
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.