AstroMaster Series Telescopes
... Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your telescope, so you should keep this manual handy until you have fully mastered your telescope’s operation. The manual gives detailed informati ...
... Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your telescope, so you should keep this manual handy until you have fully mastered your telescope’s operation. The manual gives detailed informati ...
The First Adaptive Optics High Resolution Mid
... that AC Her’s morphology appears much more consistent with that of the PSF stars at 9.8 and 11.7 mm than an extended FWHM~0.8” disk. ...
... that AC Her’s morphology appears much more consistent with that of the PSF stars at 9.8 and 11.7 mm than an extended FWHM~0.8” disk. ...
The Southern Fall PDF - Treasures of the Southern Sky
... of 7500 light-years. It extends for some 260 light-years across the southern Milky Way and is clearly visible to the ...
... of 7500 light-years. It extends for some 260 light-years across the southern Milky Way and is clearly visible to the ...
About the Hubble Space Telescope
... Cold War, being in many respects a copy of a KH-11 reconnaissance satellite. Hubble is just one of roughly a dozen large telescopes of similar design that have been lofted into orbit—but Hubble was designed to look up, not down. The heart of Hubble is its 2.4-m mirror. While small by the standards o ...
... Cold War, being in many respects a copy of a KH-11 reconnaissance satellite. Hubble is just one of roughly a dozen large telescopes of similar design that have been lofted into orbit—but Hubble was designed to look up, not down. The heart of Hubble is its 2.4-m mirror. While small by the standards o ...
JWST_eye - University of Arizona
... Compared to our naked eyes, modern telescopes collect more light and reveal fainter objects. Celestial objects are often fainter because they are farther away, so it takes their light some time to make the journey to us. Thus, the light that reaches us is old, and we see objects as they appeared in ...
... Compared to our naked eyes, modern telescopes collect more light and reveal fainter objects. Celestial objects are often fainter because they are farther away, so it takes their light some time to make the journey to us. Thus, the light that reaches us is old, and we see objects as they appeared in ...
High precision astrometry as a tool for Fundamental
... Performance on 8 m telescope with adaptive optics Observation in near infrared bands Photon noise, near diffraction limited imaging ...
... Performance on 8 m telescope with adaptive optics Observation in near infrared bands Photon noise, near diffraction limited imaging ...
Hubble`s Use of Cepheids (PDF version)
... at the limits of the world’s largest telescopes! So the nebulae must be very far away – and thus very large, comparable to our Milky Way. ...
... at the limits of the world’s largest telescopes! So the nebulae must be very far away – and thus very large, comparable to our Milky Way. ...
Comparison of low- and high-mass star formation
... to competitive accretion. One may plausibly identify the dense filament in the early phase and the dense region at the bottom of the global gravitational potential well in the late phase as a McKee–Tan core (McKee & Tan 2003). However, the “cores” so identified are transient objects that are not in ...
... to competitive accretion. One may plausibly identify the dense filament in the early phase and the dense region at the bottom of the global gravitational potential well in the late phase as a McKee–Tan core (McKee & Tan 2003). However, the “cores” so identified are transient objects that are not in ...
The Project Gutenberg EBook of History of Astronomy, by George
... astronomy,” nor a complete “descriptive astronomy,” and still less a book on “speculative astronomy.” Something of each of these is essential, however, for tracing the progress of thought and knowledge which it is the object of this History to describe. The progress of human knowledge is measured by ...
... astronomy,” nor a complete “descriptive astronomy,” and still less a book on “speculative astronomy.” Something of each of these is essential, however, for tracing the progress of thought and knowledge which it is the object of this History to describe. The progress of human knowledge is measured by ...
Century-Long Monitoring of Solar Irradiance and Earth`s Albedo
... LEO (Dever et al. 2012, Table 4). To achieve an albedo stability over a century, GeoSphere’s surface should be a simple metal, alloy, or crystalline material not susceptible to such changes, like telescope optics in space. Such substances would need testing before launch, and perhaps “pre-aged” by d ...
... LEO (Dever et al. 2012, Table 4). To achieve an albedo stability over a century, GeoSphere’s surface should be a simple metal, alloy, or crystalline material not susceptible to such changes, like telescope optics in space. Such substances would need testing before launch, and perhaps “pre-aged” by d ...
The Distances to the Stars
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
Galaxy Notes File
... Milky Way and contains more than 1,000 (and possibly as many as 10,000) galaxies. The Milky Way is a member of a small cluster called the Local Group which contains about 40 galaxies. The largest member of the Local Group is M 31, with the Milky Way coming in second in size. ...
... Milky Way and contains more than 1,000 (and possibly as many as 10,000) galaxies. The Milky Way is a member of a small cluster called the Local Group which contains about 40 galaxies. The largest member of the Local Group is M 31, with the Milky Way coming in second in size. ...
Inferring Telescope Polarization Properties Through
... X by inserting polarization calibration optics between the two. This point of insertion made the polarimeter matrix X constant in time but made the telescope Mueller matrix T time-dependent to account for the varying telescope geometry. The calibration optics provided the polarization properties of ...
... X by inserting polarization calibration optics between the two. This point of insertion made the polarimeter matrix X constant in time but made the telescope Mueller matrix T time-dependent to account for the varying telescope geometry. The calibration optics provided the polarization properties of ...
The Stellar Content of Obscured Galactic Giant H II Regions
... Indeed, Hanson et al. (1997) have presented a detailed investigation of the ionizing O and B stars in M17, a relatively nearby but partially obscured giant HII region. In addition, the central 50 pc of the Milky Way have been intensely studied with the application of near infrared spectroscopy. It h ...
... Indeed, Hanson et al. (1997) have presented a detailed investigation of the ionizing O and B stars in M17, a relatively nearby but partially obscured giant HII region. In addition, the central 50 pc of the Milky Way have been intensely studied with the application of near infrared spectroscopy. It h ...
Astronomical Picture of the Day
... The Orion Nebula (a) is a giant cloud of gas and dust in which new stars and planets are forming. It is located about 1,500 light-years from Earth, which means the light recorded in the photograph took about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) sho ...
... The Orion Nebula (a) is a giant cloud of gas and dust in which new stars and planets are forming. It is located about 1,500 light-years from Earth, which means the light recorded in the photograph took about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) sho ...
- River Bend Astronomy Club
... Robotic Telescopes, presented at the Astrometry in Latin America conference in 2002, profiled the Fountain Hills program and other computerized observing systems. Juels and Holvorcem discovered asteroid 48300 Kronk on June 11, 2002. For more on 48300 and its namesake, club president Gary Kronk, see ...
... Robotic Telescopes, presented at the Astrometry in Latin America conference in 2002, profiled the Fountain Hills program and other computerized observing systems. Juels and Holvorcem discovered asteroid 48300 Kronk on June 11, 2002. For more on 48300 and its namesake, club president Gary Kronk, see ...
Topic 11_4__Resolution
... PRACTICE: A radio telescope having a diameter of 68 m is receiving radio signals of 2.0 GHz from two stars that are 75 light years (ly) away and separated by 0.045 ly. (a) If another identical radio telescope is located 350 m away and it can be used in concert with the first one to create a single t ...
... PRACTICE: A radio telescope having a diameter of 68 m is receiving radio signals of 2.0 GHz from two stars that are 75 light years (ly) away and separated by 0.045 ly. (a) If another identical radio telescope is located 350 m away and it can be used in concert with the first one to create a single t ...
A sound nebula: the origin of the Solar System in the field of a
... It consists of trillions of small objects composed of dust and water, ammonia and methane ice and it is believed that these objects were scattered outwards by the gas giants at the planetary formation stage and then acquired distant circular orbits (out to about one light year) as a result of gravi ...
... It consists of trillions of small objects composed of dust and water, ammonia and methane ice and it is believed that these objects were scattered outwards by the gas giants at the planetary formation stage and then acquired distant circular orbits (out to about one light year) as a result of gravi ...
Galileo`s miraculous year: 1609 and the revolutionary telescope
... recognise that the star diameters he measured were due to diffraction through the collimators of his lenses (and other effects), not the true magnified star diameters. Over the years, the two stars of Mizar did not show any parallax that Galileo could observe. Of course no such parallax of Mizar, tru ...
... recognise that the star diameters he measured were due to diffraction through the collimators of his lenses (and other effects), not the true magnified star diameters. Over the years, the two stars of Mizar did not show any parallax that Galileo could observe. Of course no such parallax of Mizar, tru ...
Summer 2014 Mercury - Astronomical Society of the Pacific
... for the naming of minor planets has announced that the asteroid 1980 SM, located in the main belt between Mars and Jupiter, will be known as (7984) Marius. So, why all the fuss about this 400-yearold book? In it, Marius claimed to have found the satellites independently of Galileo in January 1610. O ...
... for the naming of minor planets has announced that the asteroid 1980 SM, located in the main belt between Mars and Jupiter, will be known as (7984) Marius. So, why all the fuss about this 400-yearold book? In it, Marius claimed to have found the satellites independently of Galileo in January 1610. O ...
Astronomical Facts `n Stuff
... An optical camera aboard the Hubble Space Telescope that uses CCD detectors to make images. The camera covers twice the 4 October 2012 ...
... An optical camera aboard the Hubble Space Telescope that uses CCD detectors to make images. The camera covers twice the 4 October 2012 ...
The Visible and Infrared Survey Telescope for Astronomy \(VISTA
... surface brightness of the night sky at Ks band; thus, the detectors must be blocked from viewing any significant solid angle of warm high-emissivity surfaces. Also, an IR camera requires at least a transmissive vacuum window, and typically several transmissive corrector elements. All standard optica ...
... surface brightness of the night sky at Ks band; thus, the detectors must be blocked from viewing any significant solid angle of warm high-emissivity surfaces. Also, an IR camera requires at least a transmissive vacuum window, and typically several transmissive corrector elements. All standard optica ...
NearInfrared Study of the Pulsar Wind Nebula in G21.50.9 A. Zajczyk , Y. Gallant
... G21.50.9 is a compositetype supernova remnant. Its complex structure is well visible in the Xray image taken with the Chandra observatory (Fig. 1) where not only the pulsar wind nebula is present but also the nonthermal halo that surrounds it. To the north of the PWN the “Nort ...
... G21.50.9 is a compositetype supernova remnant. Its complex structure is well visible in the Xray image taken with the Chandra observatory (Fig. 1) where not only the pulsar wind nebula is present but also the nonthermal halo that surrounds it. To the north of the PWN the “Nort ...
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.