A Faint Star Orbiting the Big Dipper’s Alcor Discovered
... to his government with an actual working telescope. Lipperhey’s name has been more or less forgotten over time, as others took this marvelous new invention and started doing spectacular things. One of those people is the reason 2009 was celebrated as the International Year of Astronomy. Galileo Gali ...
... to his government with an actual working telescope. Lipperhey’s name has been more or less forgotten over time, as others took this marvelous new invention and started doing spectacular things. One of those people is the reason 2009 was celebrated as the International Year of Astronomy. Galileo Gali ...
CONSTELLATION TELESCOPIUM THE TELESCOPE Telescopium
... skopeo or skeptomai, to look at or view. It is an optical instrument for making distant objects appear nearer and larger. It consists of tubes with an arrangement of lenses, or of one or more mirrors and lenses, by which the rays of light are collected and brought to a focus and the resulting image ...
... skopeo or skeptomai, to look at or view. It is an optical instrument for making distant objects appear nearer and larger. It consists of tubes with an arrangement of lenses, or of one or more mirrors and lenses, by which the rays of light are collected and brought to a focus and the resulting image ...
Measuring the size of small things Stellar Diameters Atmospheric Cherenkov Telescopes
... approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the cord, which amounts to the same thing as one of the sides which includes the ...
... approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the cord, which amounts to the same thing as one of the sides which includes the ...
Astro-Tech`s AT6RC offers great imaging on a budget
... The Hercules Cluster (M13, left photo) and Albireo (Beta [β] Cygni) appear sharp in these images the author took through the Astro-Tech AT6RC. Phil Harrington captured both by attaching his Canon XTi digital SLR to the telescope’s focuser and setting the digital speed at ISO 400. He created the Herc ...
... The Hercules Cluster (M13, left photo) and Albireo (Beta [β] Cygni) appear sharp in these images the author took through the Astro-Tech AT6RC. Phil Harrington captured both by attaching his Canon XTi digital SLR to the telescope’s focuser and setting the digital speed at ISO 400. He created the Herc ...
Vibration Isolation in Electro-Optical Spacecraft
... This report discussing vibration in electro-optical spacecraft: the sources of vibration, methods of analyzing and isolating vibration, and the effects of vibration on the image. There was insufficient time to organize the material to the author’s liking. Hopefully the Powerpoint presentation will h ...
... This report discussing vibration in electro-optical spacecraft: the sources of vibration, methods of analyzing and isolating vibration, and the effects of vibration on the image. There was insufficient time to organize the material to the author’s liking. Hopefully the Powerpoint presentation will h ...
MS word document
... Prof Rebolo opened the meeting by welcoming the attendees and inviting modifications to the agenda. The agenda was adopted and is attached for reference. Prof Gilmore presented an overview of OPTICON, stressing its role of bringing together groups with common problems to develop solutions/opportunit ...
... Prof Rebolo opened the meeting by welcoming the attendees and inviting modifications to the agenda. The agenda was adopted and is attached for reference. Prof Gilmore presented an overview of OPTICON, stressing its role of bringing together groups with common problems to develop solutions/opportunit ...
Paper
... Size, weight, and a lack of adaptability currently hinder the effectiveness of conventional imaging sensors in a number of military applications, including space-based space situational awareness (SSA), intelligence, surveillance, and reconnaissance (ISR), and missile tracking. The development of se ...
... Size, weight, and a lack of adaptability currently hinder the effectiveness of conventional imaging sensors in a number of military applications, including space-based space situational awareness (SSA), intelligence, surveillance, and reconnaissance (ISR), and missile tracking. The development of se ...
HOW do astronomers work? How do they ana
... Astronomers observe according to the field in which they are interested. One might say there are "light of the moon" and "dark of the moon" astronomers. Those interested in photographing distant nebulae or stars must do their work in the dark of the moon when there is a minimum of light from other t ...
... Astronomers observe according to the field in which they are interested. One might say there are "light of the moon" and "dark of the moon" astronomers. Those interested in photographing distant nebulae or stars must do their work in the dark of the moon when there is a minimum of light from other t ...
PHYS 632 Lecture 14: Images
... How tall must be a mirror be for a person to see his entire reflection in it. Let H be the height of a man and let l be the height of the mirror? ...
... How tall must be a mirror be for a person to see his entire reflection in it. Let H be the height of a man and let l be the height of the mirror? ...
4-3.8 - S2TEM Centers SC
... Sir Isaac Newton built a metal-mirror Reflecting telescope in the 1680s. ...
... Sir Isaac Newton built a metal-mirror Reflecting telescope in the 1680s. ...
The wide field upgrade for the Hobby-Eberly Telescope
... meter diameter mirror, and one convex 0.23 m diameter mirror. Three of the mirrors are conic sections, and one is an 8th order polynomial aspheric. The corrector is designed for feeding optical fibers, and so the chief ray from all field angles is normal to the focal surface. This is achieved with a ...
... meter diameter mirror, and one convex 0.23 m diameter mirror. Three of the mirrors are conic sections, and one is an 8th order polynomial aspheric. The corrector is designed for feeding optical fibers, and so the chief ray from all field angles is normal to the focal surface. This is achieved with a ...
Astronomical Telescope for New York – A Proposal
... ATNY instruments to maximize scientific synergy, consisting of (1) a high spectral resolution (R~70,000 and ~15,000) near-IR spectrograph, and (2) an IFU in the near-IR with an imaging mode and moderate spectral resolution (R~1000-5000), with the next-generation instruments determined via a call for ...
... ATNY instruments to maximize scientific synergy, consisting of (1) a high spectral resolution (R~70,000 and ~15,000) near-IR spectrograph, and (2) an IFU in the near-IR with an imaging mode and moderate spectral resolution (R~1000-5000), with the next-generation instruments determined via a call for ...
file - Observatory Sciences
... large optical telescope. Objects are tracked by a moving instrument package located 13m above the mirror at prime focus. As an object moves overhead, its light bounces off the large stationary mirror, and the tracking package moves to catch it, always precisely at the exact location of focus. Now a ...
... large optical telescope. Objects are tracked by a moving instrument package located 13m above the mirror at prime focus. As an object moves overhead, its light bounces off the large stationary mirror, and the tracking package moves to catch it, always precisely at the exact location of focus. Now a ...
Downloadable Full Text
... DONUT generates an estimate of the wavefront aberrations by directly fitting a model of the aberrated image to the observed defocused star (which is donut shaped in the case of a telescope with a central obscuration, hence the name). An iterative fitting algorithm creates a model of the aberrated im ...
... DONUT generates an estimate of the wavefront aberrations by directly fitting a model of the aberrated image to the observed defocused star (which is donut shaped in the case of a telescope with a central obscuration, hence the name). An iterative fitting algorithm creates a model of the aberrated im ...
High energy cosmic gamma rays detectors
... IACTs use a matrix of photo multipliers in the focal plane of the segmented mirror in the David-Cotton geometry to detect the light flashes of Cherenkov light generated by ultra-relativistic charged secondary air shower particles against a large background due to the light of the night sky. As it wa ...
... IACTs use a matrix of photo multipliers in the focal plane of the segmented mirror in the David-Cotton geometry to detect the light flashes of Cherenkov light generated by ultra-relativistic charged secondary air shower particles against a large background due to the light of the night sky. As it wa ...
University of Dayton Flyer Observatory (UFO)
... A Ritchey-Chrétien is a specialized Cassegrain reflector utilizing true hyperbolic surfaces. All reflectors typically have an aberration called coma - all except for the Ritchey-Chrétien. The hyperbolic mirrors of the Ritchey-Chrétien make this design coma free, which results in a much smaller spot ...
... A Ritchey-Chrétien is a specialized Cassegrain reflector utilizing true hyperbolic surfaces. All reflectors typically have an aberration called coma - all except for the Ritchey-Chrétien. The hyperbolic mirrors of the Ritchey-Chrétien make this design coma free, which results in a much smaller spot ...
Optics: Lenses and Mirrors
... Part B: Spherical Lenses Here you will set up the lenses on an optical bench and find the images of the light through a triangular aperture. First try to use a screen to find the image. If you cannot do this it may be a virtual image. In this case you can look through the lens to see the image but c ...
... Part B: Spherical Lenses Here you will set up the lenses on an optical bench and find the images of the light through a triangular aperture. First try to use a screen to find the image. If you cannot do this it may be a virtual image. In this case you can look through the lens to see the image but c ...
File - Science Maths Master
... A parallel beam of monochromatic light, incident on a converging lens and parallel to the axis, fills the lens aperture completely. After transmission through the lens the beam falls on a plane surface placed parallel to the plane of the aperture and approximately 1 m away from it. The plane surface ...
... A parallel beam of monochromatic light, incident on a converging lens and parallel to the axis, fills the lens aperture completely. After transmission through the lens the beam falls on a plane surface placed parallel to the plane of the aperture and approximately 1 m away from it. The plane surface ...
Station #3: Make a Refracting Telescope
... Note: If it is hard for some students to understand the difference in lenses, show them using the two lenses provided that when placed over printed words a concave lens will not change the size of an object, while a convex lens will make an object larger. Ask students to place their telescopes on th ...
... Note: If it is hard for some students to understand the difference in lenses, show them using the two lenses provided that when placed over printed words a concave lens will not change the size of an object, while a convex lens will make an object larger. Ask students to place their telescopes on th ...
JWST Project Status, AAAC
... NICMOS and IRAC arrays have demonstrated the basic detector architecture but with lower performance and smaller formats. TRL 4 achieved Feb 2002 with JWST performance levels achieved TRL 5 achieved Feb 2003 with JWST size 2Kx2K devices, mosaicing Astronomical Image with prototype, Sept. 2003 ...
... NICMOS and IRAC arrays have demonstrated the basic detector architecture but with lower performance and smaller formats. TRL 4 achieved Feb 2002 with JWST performance levels achieved TRL 5 achieved Feb 2003 with JWST size 2Kx2K devices, mosaicing Astronomical Image with prototype, Sept. 2003 ...
Reflecting And Refracting Light
... • We describe the path of light as straight-line rays • Reflection off a flat surface follows a simple rule: – angle in (incidence) equals angle out (reflection) – angles measured from surface “normal” (perpendicular) ...
... • We describe the path of light as straight-line rays • Reflection off a flat surface follows a simple rule: – angle in (incidence) equals angle out (reflection) – angles measured from surface “normal” (perpendicular) ...
GRIS: The GREGOR Infrared Spectrograph
... shown in the spot diagram of Fig. 6. There are some apparent aberrations, which lie nonetheless inside the Airy disk of the system. Consequently, the design can be considered as diffraction-limited. Special emphasis has been put on the mechanical design of the support of all optical elements to avoi ...
... shown in the spot diagram of Fig. 6. There are some apparent aberrations, which lie nonetheless inside the Airy disk of the system. Consequently, the design can be considered as diffraction-limited. Special emphasis has been put on the mechanical design of the support of all optical elements to avoi ...
UNIT TWO Astronomical Instruments and Light
... ____ 13. ____________ has (have) wavelengths that are longer than visible light. a. Gamma-rays b. Ultraviolet light ...
... ____ 13. ____________ has (have) wavelengths that are longer than visible light. a. Gamma-rays b. Ultraviolet light ...
Reminiscing about Mt. Wilson 60
... and another observer to watch CAREFULLY as he lowered the telescope to the deep southern skies, trying to avoid hitting part of the mount ! We wound up within an inch or two of doing so ! But the other planets are wonderful sights also. With an fratio of 16 and 60-inches of objective glass, the foca ...
... and another observer to watch CAREFULLY as he lowered the telescope to the deep southern skies, trying to avoid hitting part of the mount ! We wound up within an inch or two of doing so ! But the other planets are wonderful sights also. With an fratio of 16 and 60-inches of objective glass, the foca ...
CU_EOSS_class (PPTmin) - Colorado Space Grant Consortium
... A high-altitude, balloon-borne optical telescope could generate high resolution images on a par with HST. But do it at a tiny fraction of the cost. ...
... A high-altitude, balloon-borne optical telescope could generate high resolution images on a par with HST. But do it at a tiny fraction of the cost. ...
Reflecting telescope
A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a ""catoptric"" telescope.