Telescopes
... It was ahead of its time because technology was not quite up to keeping the mirror segments aligned. Need precise alignment to maintain a good focus. Wavelength of light ~5000 Å (5x10-7 m) ...
... It was ahead of its time because technology was not quite up to keeping the mirror segments aligned. Need precise alignment to maintain a good focus. Wavelength of light ~5000 Å (5x10-7 m) ...
Astronomy`ssixth annual STAR PRODUCTS
... and autoguiding camera. Sensitivity is excellent, with an impressive quantum efficiency of 77 percent. The large 6.45mm by 4.75mm imaging area makes finding and acquiring a guide star easy. At the size of an eyepiece and weighing just 3 ounces (85g), the Lodestar X2 slips into a standard 11/4" focus ...
... and autoguiding camera. Sensitivity is excellent, with an impressive quantum efficiency of 77 percent. The large 6.45mm by 4.75mm imaging area makes finding and acquiring a guide star easy. At the size of an eyepiece and weighing just 3 ounces (85g), the Lodestar X2 slips into a standard 11/4" focus ...
Max Planck Institute for Extraterrestrial Physics
... (block optical path while laser fires); control alignment of laser on optical axis ...
... (block optical path while laser fires); control alignment of laser on optical axis ...
MAORY: A Multi-conjugate Adaptive Optics RelaY for the E-ELT
... of them are used to measure tip-tilt only, while the third, positioned on the brightest star found on the search field, is used to measure tip-tilt and focus in order to provide a reference for the rapidly varying focus term in the LGS signals due to the sodium layer instability. The three NGS are ...
... of them are used to measure tip-tilt only, while the third, positioned on the brightest star found on the search field, is used to measure tip-tilt and focus in order to provide a reference for the rapidly varying focus term in the LGS signals due to the sodium layer instability. The three NGS are ...
Multi-Coated Achromatic Lenses
... 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 of the field of view are not round but have a somewhat triangular shape. At f/4 the effect of coma is very strong, probably accounting for the fac ...
... 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 of the field of view are not round but have a somewhat triangular shape. At f/4 the effect of coma is very strong, probably accounting for the fac ...
Stellar Activity with SONG
... High stability (<50nm) of the optical surface required → use low expansion mirror substrates ...
... High stability (<50nm) of the optical surface required → use low expansion mirror substrates ...
Inexpensive mount for a large millimeter
... useful optical configuration. At millimeter wavelengths, two practical constraints drive the optical design: 1. Signals must be brought into a cold box that contains the detectors. A low-loss, millimeterwavelength vacuum window cannot be larger than ∼0.5 m diameter, so a wide-field instrument requir ...
... useful optical configuration. At millimeter wavelengths, two practical constraints drive the optical design: 1. Signals must be brought into a cold box that contains the detectors. A low-loss, millimeterwavelength vacuum window cannot be larger than ∼0.5 m diameter, so a wide-field instrument requir ...
R FIXED UNIVERSAL TELESCOPE
... range of about 40º (from 12ºN to 52ºN)2. D- Difficulties in interchanging mirrors and accessory equipment. Ritchey planed to install three fixed universal telescopes at different latitudes in order to cover the whole sky (33ºN, 0º and 33ºS) each working at no farther than seventeen degrees from the ...
... range of about 40º (from 12ºN to 52ºN)2. D- Difficulties in interchanging mirrors and accessory equipment. Ritchey planed to install three fixed universal telescopes at different latitudes in order to cover the whole sky (33ºN, 0º and 33ºS) each working at no farther than seventeen degrees from the ...
400 YEARS OF THE TELESCOPE
... Because we rode in from the bright lights of the city into the dark of the park, your pupils in your eyes are slowly opening up right now to let more light in… just wait - you will be able to see ...
... Because we rode in from the bright lights of the city into the dark of the park, your pupils in your eyes are slowly opening up right now to let more light in… just wait - you will be able to see ...
Reflecting Telescopes
... the large cubical sections at the center of gravity eliminated because of their effect on thermal input into the light beam of the telescopes. A telescope has two principal degrees of freedom, the axes around which it rotates to point to and follow a star. To a first approximation, an equatorially m ...
... the large cubical sections at the center of gravity eliminated because of their effect on thermal input into the light beam of the telescopes. A telescope has two principal degrees of freedom, the axes around which it rotates to point to and follow a star. To a first approximation, an equatorially m ...
Observational Astronomy - Spring 2014 Homework 3
... 6. There are many very exciting discoveries lately of exoplanets, which are planets orbiting stars other than the sun. We would like to build a telescope to see features on these planets. Suppose we would like to resolve continent-sized objects 1000km across in visible light with λ = 500nm on a plan ...
... 6. There are many very exciting discoveries lately of exoplanets, which are planets orbiting stars other than the sun. We would like to build a telescope to see features on these planets. Suppose we would like to resolve continent-sized objects 1000km across in visible light with λ = 500nm on a plan ...
Antarctic Infra-Red Telescope with a 40cm primary mirror
... for AIRT40 using Reytheon VIRGO-2k astronomical array. Two optical modes can be selected for TONIC2; Mode A: narrow field of view (φ5’) camera with cold Lyot stop Mode-B: φ30 arcminute wide field of view direct camera pixel scale = 0.8’’ diffraction limit = 1.4’’ @2.3μm ...
... for AIRT40 using Reytheon VIRGO-2k astronomical array. Two optical modes can be selected for TONIC2; Mode A: narrow field of view (φ5’) camera with cold Lyot stop Mode-B: φ30 arcminute wide field of view direct camera pixel scale = 0.8’’ diffraction limit = 1.4’’ @2.3μm ...
Purpose Contents 1. Activity 1
... Telescope A telescope is a scientific instrument that collects light. The telescopes at McDonald Observatory are all reflecting telescopes - that is, they use mirrors to collect the light. The number associated with the telescopes (Otto Struve 2.1meter) indicates the diameter of the telescope’s pri ...
... Telescope A telescope is a scientific instrument that collects light. The telescopes at McDonald Observatory are all reflecting telescopes - that is, they use mirrors to collect the light. The number associated with the telescopes (Otto Struve 2.1meter) indicates the diameter of the telescope’s pri ...
20Oct_2014
... with very high resolution. • In fact, the resolution is equivalent to that of a single telescope with an aperture as large as the separation in the array! ...
... with very high resolution. • In fact, the resolution is equivalent to that of a single telescope with an aperture as large as the separation in the array! ...
Tools of Astronomy Notes
... images of the sky as it would look if our eyes were able to see at radio or microwave frequencies Radio telescopes have some clear advantages over optical telescopes. Radio telescopes can be used both day and night. They can also be used on cloudy days, because radio waves can pass through clouds. O ...
... images of the sky as it would look if our eyes were able to see at radio or microwave frequencies Radio telescopes have some clear advantages over optical telescopes. Radio telescopes can be used both day and night. They can also be used on cloudy days, because radio waves can pass through clouds. O ...
m illikan`s o il d rop
... way to that devised by Millikan in 1912. It consists of a transformer which supplies a high voltage to two metal plates located inside the chamber which is mounted on top. A small telescope is fixed to focus into the middle of the chamber and an atomiser mounted so that an attached needle can be ins ...
... way to that devised by Millikan in 1912. It consists of a transformer which supplies a high voltage to two metal plates located inside the chamber which is mounted on top. A small telescope is fixed to focus into the middle of the chamber and an atomiser mounted so that an attached needle can be ins ...
June, 2011. - University of Michigan
... begin setup. Dave, Jim, Jack and I went to the demo lab to pick up the equipment we needed for 2 demos that we would be continuously running. Sandy went directly to the Museum to set up a large poster that Sandy and Betsy Dugan produced, which showed where and in what form we may (or have) found wat ...
... begin setup. Dave, Jim, Jack and I went to the demo lab to pick up the equipment we needed for 2 demos that we would be continuously running. Sandy went directly to the Museum to set up a large poster that Sandy and Betsy Dugan produced, which showed where and in what form we may (or have) found wat ...
File
... Observing "Invisible" light The first telescopes collected and focused visible light the kinds of waves our eyes are sensitive to. But there is a wide range of other types of light (invisible to our eyes) given off by objects in the universe. Because all such waves are given off by electric and magn ...
... Observing "Invisible" light The first telescopes collected and focused visible light the kinds of waves our eyes are sensitive to. But there is a wide range of other types of light (invisible to our eyes) given off by objects in the universe. Because all such waves are given off by electric and magn ...
Radio Telescopes
... Nonoptical Telescopes in Space • Because most electromagnetic waves are blocked by the Earth’s atmosphere, sciences have placed telescopes in space. • Chandra X-Ray Observatory— spacebased telescope that detects X-rays. • Some x-ray telescopes can detect something the size of a Frisbee on the surfa ...
... Nonoptical Telescopes in Space • Because most electromagnetic waves are blocked by the Earth’s atmosphere, sciences have placed telescopes in space. • Chandra X-Ray Observatory— spacebased telescope that detects X-rays. • Some x-ray telescopes can detect something the size of a Frisbee on the surfa ...