Dobsonians Reflector Telescopes
... Travel to the best site that is reasonably accessible. It should be away from city lights, and upwind from any source of air pollution. Always choose as high an elevation as possible; this will get you above some of the lights and pollution and will ensure that you aren't in any ground fog. Sometime ...
... Travel to the best site that is reasonably accessible. It should be away from city lights, and upwind from any source of air pollution. Always choose as high an elevation as possible; this will get you above some of the lights and pollution and will ensure that you aren't in any ground fog. Sometime ...
The World`s Easiest Equatorial Mount Instruction Manual
... When using an equatorial mount, you can move your telescope to these settings and find the star that corresponds to that address. You will need to have a Star Atlas to use the equatorial mount. You can purchase one at just about any bookstore on earth. As well, you will need to be able to identify 2 ...
... When using an equatorial mount, you can move your telescope to these settings and find the star that corresponds to that address. You will need to have a Star Atlas to use the equatorial mount. You can purchase one at just about any bookstore on earth. As well, you will need to be able to identify 2 ...
Light and Telescopes Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... all electromagnetic radiation follows the same basic “rules” when it comes to how they interact with matter. ...
... all electromagnetic radiation follows the same basic “rules” when it comes to how they interact with matter. ...
4.1 Detectability of extrasolar planets
... telescope in space) and by wavefront phase errors both internal and external. Diffraction is in many ways the easiest to control. A wide variety of coronagraphs have been developed since Lyot’s original paper (Lyot 1939). The can be characterized by their throughput for off-axis (planetary) sources ...
... telescope in space) and by wavefront phase errors both internal and external. Diffraction is in many ways the easiest to control. A wide variety of coronagraphs have been developed since Lyot’s original paper (Lyot 1939). The can be characterized by their throughput for off-axis (planetary) sources ...
Telescopes—
... pictures in Bernard Brandl’s site, so I won’t include them here. Some of the most important are: • Prime-- The earliest choice, particularly for refractors. For reflectors this has the major disadvantage that the – usually heavy—observer and instrument have to be at the top end of the telescope, whi ...
... pictures in Bernard Brandl’s site, so I won’t include them here. Some of the most important are: • Prime-- The earliest choice, particularly for refractors. For reflectors this has the major disadvantage that the – usually heavy—observer and instrument have to be at the top end of the telescope, whi ...
PACS Test Facility Capabilities – Cryogenics and OGSE
... A) FL_E-filter, T~85% for λ>52μm + quartz glass, 0.5mm thick, T~76% for λ>35μm at reference position 8.5 mm B) closed (T=0%) at reference position 98.5 mm C) quartz glass, 0.5mm thick, T~76% for λ>35μm at reference position 198.5 mm ...
... A) FL_E-filter, T~85% for λ>52μm + quartz glass, 0.5mm thick, T~76% for λ>35μm at reference position 8.5 mm B) closed (T=0%) at reference position 98.5 mm C) quartz glass, 0.5mm thick, T~76% for λ>35μm at reference position 198.5 mm ...
User Manual for the UofL CDK20 System at Mt Kent...
... required to change the focus FWHM by one pixel. Limit switches disable excessive motion in one direction or the other. The focusser is connected to a Phidgets controller in a small box on the back of the OTA, which also holds man-off-comp switch which should be at comp for operation. The controller ...
... required to change the focus FWHM by one pixel. Limit switches disable excessive motion in one direction or the other. The focusser is connected to a Phidgets controller in a small box on the back of the OTA, which also holds man-off-comp switch which should be at comp for operation. The controller ...
On the Parabolic Curve of Primary Mirrors
... into the shape of a parabola. The reason for this is that when light enters the telescope tube, it is reflected off of the parabolic mirror and, due to the unique parabolic shape, is focused at a single point (the focus) which is a certain distance away from the center of the mirror (the focal lengt ...
... into the shape of a parabola. The reason for this is that when light enters the telescope tube, it is reflected off of the parabolic mirror and, due to the unique parabolic shape, is focused at a single point (the focus) which is a certain distance away from the center of the mirror (the focal lengt ...
Observing Double Stars
... CCD cameras, and fast, low noise EMCCD frame transfer cameras. Advanced techniques include blind or other deconvolution strategies, lucky imaging, and speckle interferometry. Although beyond the scope of this paper, the absolute cutting edge with respect to close separation (and hence short binary p ...
... CCD cameras, and fast, low noise EMCCD frame transfer cameras. Advanced techniques include blind or other deconvolution strategies, lucky imaging, and speckle interferometry. Although beyond the scope of this paper, the absolute cutting edge with respect to close separation (and hence short binary p ...
this owner`s manual for Apertura dobs
... dramatically increase your personal knowledge of the night sky! You don’t need to memorize every single object in the night sky, but it can be very rewarding just knowing a handful of the most prominent sights such as the Orion constellation, the Big Dipper, the North Star, etc. A star chart will he ...
... dramatically increase your personal knowledge of the night sky! You don’t need to memorize every single object in the night sky, but it can be very rewarding just knowing a handful of the most prominent sights such as the Orion constellation, the Big Dipper, the North Star, etc. A star chart will he ...
electronic imaging in
... them to use to catalogue the appearance and properties of a wide range of objects in the night sky. The photographic process was unarguably more accurate and more sensitive than the keenest human eye and the most artistic hand. From planets to stars to galaxies, the new observational tools were appl ...
... them to use to catalogue the appearance and properties of a wide range of objects in the night sky. The photographic process was unarguably more accurate and more sensitive than the keenest human eye and the most artistic hand. From planets to stars to galaxies, the new observational tools were appl ...
06 SIG Page 81-96 Scopes
... His original design is still extensively used today and appropriately called the Newtonian Reflector. Although Newton's original mirror measured just 13 inches in diameter, today, common sizes range from 42 to 12 inches. Many Newtonian reflectors, especially those called “Dobsonians,” which are char ...
... His original design is still extensively used today and appropriately called the Newtonian Reflector. Although Newton's original mirror measured just 13 inches in diameter, today, common sizes range from 42 to 12 inches. Many Newtonian reflectors, especially those called “Dobsonians,” which are char ...
Linear optical model for a large ground based telescope
... Figure 1 Exit pupil OPD definition and sign convention For an on-axis object, the center of the exit pupil reference sphere, i.e. the nominal focus, is also on axis. For offaxis objects, like guide stars, the center of the reference sphere is no longer on the optical axis, but its position can nonet ...
... Figure 1 Exit pupil OPD definition and sign convention For an on-axis object, the center of the exit pupil reference sphere, i.e. the nominal focus, is also on axis. For offaxis objects, like guide stars, the center of the reference sphere is no longer on the optical axis, but its position can nonet ...
Controlling a Three Meter Mirror Array Reflector to Track Stars
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
Symposium on Telescope Science - Society for Astronomical Sciences
... pursuit of science with your telescope, all elements must be well understood and in perfect functioning order. The telescope is the collection instrument and must be well maintained. If a “goto” mount is being used, a small computer with controlling software will improve data collection productivity ...
... pursuit of science with your telescope, all elements must be well understood and in perfect functioning order. The telescope is the collection instrument and must be well maintained. If a “goto” mount is being used, a small computer with controlling software will improve data collection productivity ...
Optical Design of Giant Telescopes for Space
... effects of the atmosphere and far from the thermal emission of earth itself The next giant steps in our understanding ofthe universe will require giant telescopes in space. Some basic requirements for a giant telescope come from the physics of light creation and propagation. The wavelength of intere ...
... effects of the atmosphere and far from the thermal emission of earth itself The next giant steps in our understanding ofthe universe will require giant telescopes in space. Some basic requirements for a giant telescope come from the physics of light creation and propagation. The wavelength of intere ...
The venerable craft of telescope mirror grinding takes on a
... has always been a tedious, costly, subjective, and not always completely successful process. It reached its peak with the magnificent 200-inch reflector for the Hale telescope on California's Mount Palomar, installed in 1948. Since then, mirror-making, with the aid of some advanced techniques, has c ...
... has always been a tedious, costly, subjective, and not always completely successful process. It reached its peak with the magnificent 200-inch reflector for the Hale telescope on California's Mount Palomar, installed in 1948. Since then, mirror-making, with the aid of some advanced techniques, has c ...
CCD Observatory in school - EU-HOU
... to a webcam, however, it means that this lens will always have a maximum aperture. This is not a problem when we want to photograph weaker objects because in this case we have to use the lens’ full brightness anyway. If, however, we want to photograph the Moon, we might want to make the aperture sma ...
... to a webcam, however, it means that this lens will always have a maximum aperture. This is not a problem when we want to photograph weaker objects because in this case we have to use the lens’ full brightness anyway. If, however, we want to photograph the Moon, we might want to make the aperture sma ...
Enciso Final Report
... parts with the exception of the lens from Edmund Optics labeled “Edmund 45181”. It should be noted that one additional piece is needed for the 3.3 meter distance as one design cannot accommodate the focus at both 5.7 meters and 3.3 meters simultaneously. ...
... parts with the exception of the lens from Edmund Optics labeled “Edmund 45181”. It should be noted that one additional piece is needed for the 3.3 meter distance as one design cannot accommodate the focus at both 5.7 meters and 3.3 meters simultaneously. ...
GREGOR Upgrade of the GCT on Teneriffe with a 1.5m Solar
... O. von der Lühe, W. Schmidt, D. Soltau (KIS, Freiburg) F. Kneer (USG, Göttingen) J. Staude (AIP, Potsdam) ...
... O. von der Lühe, W. Schmidt, D. Soltau (KIS, Freiburg) F. Kneer (USG, Göttingen) J. Staude (AIP, Potsdam) ...
Liquid mirror telescopes
... called coma [7]. Light from a point source (such as a star) in the center of the field is perfectly focused at the focal point of the mirror. However, when the light source is off-center (off-axis), the different parts of the mirror do not reflect the light to the same point. The further off-axis, t ...
... called coma [7]. Light from a point source (such as a star) in the center of the field is perfectly focused at the focal point of the mirror. However, when the light source is off-center (off-axis), the different parts of the mirror do not reflect the light to the same point. The further off-axis, t ...
Telescopes of the Future
... telescopes can be made extremely cold, for a million times reduction in sky background. The current generation of space telescopes has already shown how these advantages can be exploited. HST records wide-field optical images typically 10 times sharper than for uncorrected ground-based telescopes an ...
... telescopes can be made extremely cold, for a million times reduction in sky background. The current generation of space telescopes has already shown how these advantages can be exploited. HST records wide-field optical images typically 10 times sharper than for uncorrected ground-based telescopes an ...
Hubble Error: Time, Money and Millionths of an inch
... To make the space telescope’s main mirror, as well as its 12.5-inch secondary minor, PerkinElmer devised a system at its Danbury plant that substantially advanced the science. Lying on a bed of 134 titanium nails to simulate the gravity-free environment of space, the glass would be polished by a spi ...
... To make the space telescope’s main mirror, as well as its 12.5-inch secondary minor, PerkinElmer devised a system at its Danbury plant that substantially advanced the science. Lying on a bed of 134 titanium nails to simulate the gravity-free environment of space, the glass would be polished by a spi ...
Astronomical Telescope
... system illustrated above that packs a long focal length into a physically short tube, while preserving the high-contrast imagery associated with refractors of the same aperture. Catadioptric variations of the Newtonian telescope are currently very much in vogue, offering compact tube assemblies with ...
... system illustrated above that packs a long focal length into a physically short tube, while preserving the high-contrast imagery associated with refractors of the same aperture. Catadioptric variations of the Newtonian telescope are currently very much in vogue, offering compact tube assemblies with ...
Arecibo Observatory
The Arecibo Observatory is a radio telescope in the municipality of Arecibo, Puerto Rico. This observatory is operated by SRI International, USRA and UMET, under cooperative agreement with the National Science Foundation (NSF). This observatory is also called the National Astronomy and Ionosphere Center, although ""NAIC"" refers to both the observatory and the staff that operates it. From its construction in the 1960s until 2011, the observatory was managed by Cornell University.The Observatory's 1,000 ft (305 m) radio telescope is the world's largest single-aperture telescope. It is used in three major areas of research: radio astronomy, atmospheric science, and radar astronomy. Scientists who want to use the Arecibo Telescope submit proposals that are evaluated by an independent scientific board.The Radio Telescope has made appearances in motion picture and television productions, gaining more recognition in 1999 when it began to collect data for the SETI@home project. It has been listed on the American National Register of Historic Places beginning in 2008. It was the featured listing in the National Park Service's weekly list of October 3, 2008. The Center was named in IEEE Milestone in 2001. It has a visitors center that is open part time.