Economic Feasibility of a Siderostat-fed Liquid Mirror Telescope for
... in the near future, provide data using both ground- and space-based optical sensors. The CAF has chosen to help maintain the “deep-space” portion of the RSO catalog, deep-space being defined as orbital altitudes greater than 5000 km. The deep-space realm includes the Global Positioning System (GPS) s ...
... in the near future, provide data using both ground- and space-based optical sensors. The CAF has chosen to help maintain the “deep-space” portion of the RSO catalog, deep-space being defined as orbital altitudes greater than 5000 km. The deep-space realm includes the Global Positioning System (GPS) s ...
Reflection
... the image of the object at O. Images are classified as real or virtual. A real image is formed when light rays pass through and converge at a point; a virtual image is formed when the light rays do not pass through the image point but appear to be given out from the point. Hence, the image formed by ...
... the image of the object at O. Images are classified as real or virtual. A real image is formed when light rays pass through and converge at a point; a virtual image is formed when the light rays do not pass through the image point but appear to be given out from the point. Hence, the image formed by ...
Do It Yourself Telescopes
... telescopes that we will be assembling and using are very similar to the ones used by Galileo in his early explorations of the solar system and the night skies. Galileo, while he was not the first to invent the telescope (contrary to popular belief), used a similar refracting telescope with which he ...
... telescopes that we will be assembling and using are very similar to the ones used by Galileo in his early explorations of the solar system and the night skies. Galileo, while he was not the first to invent the telescope (contrary to popular belief), used a similar refracting telescope with which he ...
Polar Winter Differential image motion monitor (PWD)
... I already have a technique to control SBIG CCD camera using Linux. Furthermore, ST-i has a compact body (1.25” x 3.5”), light weight (68g), and USB bus power drive. ...
... I already have a technique to control SBIG CCD camera using Linux. Furthermore, ST-i has a compact body (1.25” x 3.5”), light weight (68g), and USB bus power drive. ...
SkyFi Quick Start
... 3. Now turn on SkyFi. Move the power switch right to the BAT position to use battery power, or left to the EXT position to use external power. 4. The status LED should light up red at first, then turn green after a few seconds. If it does not, turn the power off for a few seconds, then turn it on ag ...
... 3. Now turn on SkyFi. Move the power switch right to the BAT position to use battery power, or left to the EXT position to use external power. 4. The status LED should light up red at first, then turn green after a few seconds. If it does not, turn the power off for a few seconds, then turn it on ag ...
114EQ-ASTR
... Can you ever have too much power? If the type of power you’re referring to is eyepiece magnification, yes you can! The most common mistake of the beginning observer is to “overpower” a telescope by using high magnifications which the telescope’s aperture and atmospheric conditions cannot reasonably ...
... Can you ever have too much power? If the type of power you’re referring to is eyepiece magnification, yes you can! The most common mistake of the beginning observer is to “overpower” a telescope by using high magnifications which the telescope’s aperture and atmospheric conditions cannot reasonably ...
The Big Eye Now and Then
... onto a domed ceiling to give the audience the illusion of being out under the night sky. Astronomers at Palomar recently made an artificial star of their own in the real sky. To make this artificial star, a laser was broadcast into the sky. This was the first step in creating a laserguide star for u ...
... onto a domed ceiling to give the audience the illusion of being out under the night sky. Astronomers at Palomar recently made an artificial star of their own in the real sky. To make this artificial star, a laser was broadcast into the sky. This was the first step in creating a laserguide star for u ...
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 ...
THE LAS CAMPANAS INFRARED SURVEY CAMERA S. E. Persson
... object) to concave mirror M1 is equal to the radius of curvature of M1. Likewise, the image distance (from M3) is equal to the radius of curvature of M3. The image of an object near infinity—in our case, the telescope exit pupil—is formed by M1 at a distance equal to one-half its radius, ...
... object) to concave mirror M1 is equal to the radius of curvature of M1. Likewise, the image distance (from M3) is equal to the radius of curvature of M3. The image of an object near infinity—in our case, the telescope exit pupil—is formed by M1 at a distance equal to one-half its radius, ...
the eye of the beholder: designing the owl
... 19981. Although proposals for telescopes with diameters much larger than deemed possible had been laid down as early as 19782,3, 19924 and 19965, this was, perhaps, the first occasion where not only possible design solutions but also plausible fabrication technologies were introduced. Since then, th ...
... 19981. Although proposals for telescopes with diameters much larger than deemed possible had been laid down as early as 19782,3, 19924 and 19965, this was, perhaps, the first occasion where not only possible design solutions but also plausible fabrication technologies were introduced. Since then, th ...
Max Planck Institute for Extraterrestrial Physics
... • enclosed structure filled with N2; totally surrounded by wind baffle; ...
... • enclosed structure filled with N2; totally surrounded by wind baffle; ...
Monte-Carlo Simulation of Stellar Intensity Interferometry by Janvida Rou
... not suffer from path length differences of up to a few centimeters). As a consequence, SII presents advantages: it is essentially insensitive to atmospheric turbulence, it does not require high quality optics, and it permits large baseline and short wavelength measurements without extra difficulties ...
... not suffer from path length differences of up to a few centimeters). As a consequence, SII presents advantages: it is essentially insensitive to atmospheric turbulence, it does not require high quality optics, and it permits large baseline and short wavelength measurements without extra difficulties ...
Targeted and All-Sky Search for Nanosecond Optical Pulses at
... 1-meter telescope. The Poisson-distributed arrivals do not significantly pile up; observing a single photon is rare in a nanosecond and large pulses are exponentially suppressed. By using a beam splitter and a pair of photodetectors wired in coincidence (a scheme taught by Dan Werthimer for the allev ...
... 1-meter telescope. The Poisson-distributed arrivals do not significantly pile up; observing a single photon is rare in a nanosecond and large pulses are exponentially suppressed. By using a beam splitter and a pair of photodetectors wired in coincidence (a scheme taught by Dan Werthimer for the allev ...
Using a spectrohelioscope to observe the sun`s
... supporting the plane mirrors into the sides of the enclosure. This limited us in our choices of possible locations. Also, the only recourse we could conceive of for attaching the tuner was to glue it to the bottom. We would have preferred to use a more secure method but screwing through the metal sh ...
... supporting the plane mirrors into the sides of the enclosure. This limited us in our choices of possible locations. Also, the only recourse we could conceive of for attaching the tuner was to glue it to the bottom. We would have preferred to use a more secure method but screwing through the metal sh ...
The science potential of atmospheric Cherenkov arrays used as intensity interferometers
... (the “e” in Be-type stars). The disk is formed in a mass-loss process from the star, and comes and goes (timescale of months to decades). It is bright in the NIR (Brehmsstrahlung). ...
... (the “e” in Be-type stars). The disk is formed in a mass-loss process from the star, and comes and goes (timescale of months to decades). It is bright in the NIR (Brehmsstrahlung). ...
PowerPoint format
... Determination of the chemical enrichment history of the Galaxy and the Universe via high resolution spectroscopy of the oldest stars in the Milky Way and gas clouds illuminated by distant quasars. • High-resolution (R=50-150,000) spectroscopy of faint objects at uv-optical wavelengths ...
... Determination of the chemical enrichment history of the Galaxy and the Universe via high resolution spectroscopy of the oldest stars in the Milky Way and gas clouds illuminated by distant quasars. • High-resolution (R=50-150,000) spectroscopy of faint objects at uv-optical wavelengths ...
University of Groningen Unraveling structure and dynamics by
... water, glycerin, or oil) multiplied by the sine of the aperture angle (sin(θ)). The diffraction-limited resolution theory was developed by Ernst Abbe in 1873 (Eq. (2)) and later refined by Lord Rayleigh in 1896. Eq. (3) quantitatively measures the separation necessary between two Airy patterns in or ...
... water, glycerin, or oil) multiplied by the sine of the aperture angle (sin(θ)). The diffraction-limited resolution theory was developed by Ernst Abbe in 1873 (Eq. (2)) and later refined by Lord Rayleigh in 1896. Eq. (3) quantitatively measures the separation necessary between two Airy patterns in or ...
An optical/UV space coronagraph concept for the terrestrial planet finder
... ripples in the mirrors or amplitude changes due to reflectivity variations can be orders of magnitude larger than the planet in the mid-spatial frequency range where discovery takes place. Wavefront accuracy on the order of λ/10, 000 is necessary to reduce the halo to acceptable levels. A visible li ...
... ripples in the mirrors or amplitude changes due to reflectivity variations can be orders of magnitude larger than the planet in the mid-spatial frequency range where discovery takes place. Wavefront accuracy on the order of λ/10, 000 is necessary to reduce the halo to acceptable levels. A visible li ...
Optical telescope
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.There are three primary types of optical telescope: refractors, which use lenses (dioptrics) reflectors, which use mirrors (catoptrics) catadioptric telescopes, which combine lenses and mirrorsA telescope's light gathering power and ability to resolve small detail is directly related to the diameter (or aperture) of its objective (the primary lens or mirror that collects and focuses the light). The larger the objective, the more light the telescope collects and the finer detail it resolves.People use telescopes and binoculars for activities such as observational astronomy, ornithology, pilotage and reconnaissance, and watching sports or performance arts.