July-August 2015 - Nottingham Astronomical Society
... lengths and focal ratios. These terms are briefly outlined below. Come and say hello. Equipment basics: Focal length, focal ratio, field of view The focal length of a telescope is measured in millimetres (mm) and is the distance from the first optical surface the light hits (the objective lens in a ...
... lengths and focal ratios. These terms are briefly outlined below. Come and say hello. Equipment basics: Focal length, focal ratio, field of view The focal length of a telescope is measured in millimetres (mm) and is the distance from the first optical surface the light hits (the objective lens in a ...
Clinical Techniques for Prescribing Bioptic Telescope
... and acuity remains inadequate for the patient’s goals, than there’s only one option left to further enhance distance vision- make it bigger! • We have only two ways to do that— – walk up close enough to see it – bring it closer optically ...
... and acuity remains inadequate for the patient’s goals, than there’s only one option left to further enhance distance vision- make it bigger! • We have only two ways to do that— – walk up close enough to see it – bring it closer optically ...
VI. Preferred Location of Telescopes
... θ = angular separation (in radians) l = wavelength of light being collected D = diameter of the primary mirror or lens the bigger the better ...
... θ = angular separation (in radians) l = wavelength of light being collected D = diameter of the primary mirror or lens the bigger the better ...
Powerpoint for today - Physics and Astronomy
... c) increase the range of waves they can collect. d) detect shorter waves than optical telescopes for superior resolution. ...
... c) increase the range of waves they can collect. d) detect shorter waves than optical telescopes for superior resolution. ...
PDF
... covering 19’ x 15’ on the sky with 18 mas pixels; UltraViolet Spectrograph (UVS) , a a multipurpose spectrometer optimized for high sensitivity observations of faint astronomical sources at spectral resolutions, λ/∆λ, of 30,000 to 100,000 in the 100-300 nm wavelength range; and eXtrasolar Planet Cha ...
... covering 19’ x 15’ on the sky with 18 mas pixels; UltraViolet Spectrograph (UVS) , a a multipurpose spectrometer optimized for high sensitivity observations of faint astronomical sources at spectral resolutions, λ/∆λ, of 30,000 to 100,000 in the 100-300 nm wavelength range; and eXtrasolar Planet Cha ...
Antares Palette - Astrodoc: Astrophotography by Ron Brecher
... followed in short order by better eyepieces, more books on astronomy, and if there was any money left, some camp gear for the inevitable summer star parties. The Huronia Star Party and Starfest were Ron’s launch pads. Those events provided him with the initial contacts and background to improve his ...
... followed in short order by better eyepieces, more books on astronomy, and if there was any money left, some camp gear for the inevitable summer star parties. The Huronia Star Party and Starfest were Ron’s launch pads. Those events provided him with the initial contacts and background to improve his ...
Multi-Coated Achromatic Lenses
... parabolic primary mirrors work very effectively to focal ratios of about f/6, but below f/6 an optical phenomenon called coma becomes increasingly pronounced. Coma results when off-axis light rays are reflected by a parabolic mirror and brought to a focus: star images away from the telescopic center ...
... parabolic primary mirrors work very effectively to focal ratios of about f/6, but below f/6 an optical phenomenon called coma becomes increasingly pronounced. Coma results when off-axis light rays are reflected by a parabolic mirror and brought to a focus: star images away from the telescopic center ...
Lecture 3, Optical and UV Astronomy
... (comet-like) because the focal length of depends on off-axis angle Astigmatism: off-axis, symmetric aberration due to light rays being focused differently in different planes Field curvature: when the focal plane is curved rather than flat Distortion: plate scale depends on off-axis angle ...
... (comet-like) because the focal length of depends on off-axis angle Astigmatism: off-axis, symmetric aberration due to light rays being focused differently in different planes Field curvature: when the focal plane is curved rather than flat Distortion: plate scale depends on off-axis angle ...
sampling and characterization of the turbulence vertical distribution
... one of the Auxiliary Telescopes of the VLTI and will be used for the “site characterization” workpackage within of the ELT-FP6 project of the European Union. 3. STATISTICAL CRITERIA AND OBSERVATIONS In order to avoid biased statistical data, we have established to obtain the measurements in the peri ...
... one of the Auxiliary Telescopes of the VLTI and will be used for the “site characterization” workpackage within of the ELT-FP6 project of the European Union. 3. STATISTICAL CRITERIA AND OBSERVATIONS In order to avoid biased statistical data, we have established to obtain the measurements in the peri ...
Magellan Associate Director Report Personnel
... • The planned re-aluminizing of the Baade primary mirror did not occur do to the failure of a bearing in the LCO frequency converter. The mirror was washed instead. • A “rain event” on Feb 28 affected the primary mirrors of both telescopes. This was after the Baade mirror was washed, but before the ...
... • The planned re-aluminizing of the Baade primary mirror did not occur do to the failure of a bearing in the LCO frequency converter. The mirror was washed instead. • A “rain event” on Feb 28 affected the primary mirrors of both telescopes. This was after the Baade mirror was washed, but before the ...
Telescope Fundamentals - Dunlap Institute
... for high spatial frequencies, this is achieved through figuring and polishing of the surface for low spatial frequencies, this is achieved by active optics Space-based telescopes: Optics need to produce a diffraction limited image In optical, mirror surface should ideally be ~1/40 of a wave (1/20 of ...
... for high spatial frequencies, this is achieved through figuring and polishing of the surface for low spatial frequencies, this is achieved by active optics Space-based telescopes: Optics need to produce a diffraction limited image In optical, mirror surface should ideally be ~1/40 of a wave (1/20 of ...
Hubble space telescope. - Physics | Oregon State University
... show the importance of the telescope to modern physics. One of the primary goals of the Hubble Telescope was to determine the age and size of the Universe. While the exact size is unknown, its age is estimated at about 13.7 billion years old. In addition the rate of expansion of the universe has bee ...
... show the importance of the telescope to modern physics. One of the primary goals of the Hubble Telescope was to determine the age and size of the Universe. While the exact size is unknown, its age is estimated at about 13.7 billion years old. In addition the rate of expansion of the universe has bee ...
Polarization & Holography
... – original (50’s-60’s) technology similar to that of home stereo use – now emphasize extremely high sensitivity and extremes in radio frequency range ...
... – original (50’s-60’s) technology similar to that of home stereo use – now emphasize extremely high sensitivity and extremes in radio frequency range ...
Instruction Manual Meade Instruments Corporation
... 2. Attach the 3 aluminum tripod legs (2) to the base of the equatorial mount (4) with the 3 hinged leg braces (3) facing inward. Three bolts (32) each about 3" long, with washers and wing nuts, are provided for this purpose in hardware package “A.” Stand the telescope mount upright, spreading the tr ...
... 2. Attach the 3 aluminum tripod legs (2) to the base of the equatorial mount (4) with the 3 hinged leg braces (3) facing inward. Three bolts (32) each about 3" long, with washers and wing nuts, are provided for this purpose in hardware package “A.” Stand the telescope mount upright, spreading the tr ...
Than Our Eyes Can See - Cool Cosmos
... 2MASS is an all-sky, ground-based survey at three near-IR wavelengths, conducted with a pair of 1.3-meter diameter telescopes located in Arizona and in Chile. Survey operations began in 1997, and will be completed in 2000. The 2MASS data are publicly accessible via the Web, and will eventually inclu ...
... 2MASS is an all-sky, ground-based survey at three near-IR wavelengths, conducted with a pair of 1.3-meter diameter telescopes located in Arizona and in Chile. Survey operations began in 1997, and will be completed in 2000. The 2MASS data are publicly accessible via the Web, and will eventually inclu ...
The Boston University Astronomy Department Annual Report 2012 Chair: Tereasa Brainerd
... physicists are typically affiliated with physics, engineering, or earth science departments. Such a large concentration of space physicists in an astronomy department makes Boston University somewhat unique. Furthermore, our graduate program is one of the nation’s largest (typically we rank in the t ...
... physicists are typically affiliated with physics, engineering, or earth science departments. Such a large concentration of space physicists in an astronomy department makes Boston University somewhat unique. Furthermore, our graduate program is one of the nation’s largest (typically we rank in the t ...
View from the space
... Astronomers has to go above enough of the Earth's atmosphere to observe some infrared wavelengths. They had to build telescopes on mountain tops for this reason. They were also able to fly their telescopes in an aircraft. Experiments can also be taken up to altitudes as high as 35 km by balloons whi ...
... Astronomers has to go above enough of the Earth's atmosphere to observe some infrared wavelengths. They had to build telescopes on mountain tops for this reason. They were also able to fly their telescopes in an aircraft. Experiments can also be taken up to altitudes as high as 35 km by balloons whi ...
Word - NASA Infrared Telescope Facility
... then issue a low to high to low reset pulse to the T3 board which will activate the TCS enable signal that enables all five power amplifiers. The TCS then issues the system power enable command which then enables the system power relay which supplies AC power to the motor, the telescope brakes, and ...
... then issue a low to high to low reset pulse to the T3 board which will activate the TCS enable signal that enables all five power amplifiers. The TCS then issues the system power enable command which then enables the system power relay which supplies AC power to the motor, the telescope brakes, and ...
DIY Astronomy – Electronic Telescope Focuser
... Could I be a part of the ultra Cool Guy Astronomers? ...
... Could I be a part of the ultra Cool Guy Astronomers? ...
Document
... suggested a cessation of Cepheid activity by Polaris before 1995. However, in 1998, Kamper & Fernie (1998) note that Polaris was still pulsating, and the decline in amplitude has stopped. They stated that they had no explanation, and that continued monitoring of Polaris is clearly important. Polaris ...
... suggested a cessation of Cepheid activity by Polaris before 1995. However, in 1998, Kamper & Fernie (1998) note that Polaris was still pulsating, and the decline in amplitude has stopped. They stated that they had no explanation, and that continued monitoring of Polaris is clearly important. Polaris ...
polar alignment and ra calibration
... Polar alignment is the process by which the telescope's axis of rotation (called the polar axis) is aligned with (i.e. made parallel to) the Earth's axis of rotation. Once aligned, a telescope with a 23:56-hr clock drive will track the stars as they move across the sky. The result is that objects ob ...
... Polar alignment is the process by which the telescope's axis of rotation (called the polar axis) is aligned with (i.e. made parallel to) the Earth's axis of rotation. Once aligned, a telescope with a 23:56-hr clock drive will track the stars as they move across the sky. The result is that objects ob ...
Document
... Euclid. In essence, Euclid will have a wide field optical imager with spatial resolution similar to the HST, but with an exceptionally carefully controlled point spread function. • Only a 1.2m telescope, but it will take HST-like images of at least half of the extragalactic sky. • Visible imager con ...
... Euclid. In essence, Euclid will have a wide field optical imager with spatial resolution similar to the HST, but with an exceptionally carefully controlled point spread function. • Only a 1.2m telescope, but it will take HST-like images of at least half of the extragalactic sky. • Visible imager con ...
Telescopes
... Advantages of radio astronomy 1. Can observe 24 hours a day 2. Clouds, rain, and snow don’t interfere 3. Observations at an entirely different frequency; get totally different information ...
... Advantages of radio astronomy 1. Can observe 24 hours a day 2. Clouds, rain, and snow don’t interfere 3. Observations at an entirely different frequency; get totally different information ...
resolution, electromagnetic waves and binary stars
... wavelengths. However, depending on the temperature of the star there will be a more intense section of the electromagnetic spectrum where the star radiates, usually in the Infra-red, Visible or Ultraviolet regions. The hotter the star, the shorter the dominant wavelength of radiation emitted. It is ...
... wavelengths. However, depending on the temperature of the star there will be a more intense section of the electromagnetic spectrum where the star radiates, usually in the Infra-red, Visible or Ultraviolet regions. The hotter the star, the shorter the dominant wavelength of radiation emitted. It is ...
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.