Encyclopedia - Telescope: Encyclopedia - Telescope
A telescope (from the Greek tele = 'far' and skopein = 'to look or see'; teleskopos = 'far-seeing') is an optical tool which gathers and ...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Types
Telescopes are broadly classified into two main types. Optical telescopes Radio telescopes Optical telescopes are also divided into two...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Types
The telescopes are broadly classified into two main categories. Optical telescopes Radio telescopes The optical telescopes are again di...   » Read the article

Encyclopedia - Crane Machine: Encyclopedia - Crane Machine
A crane is a tower or derrick equipped with cables and pulleys that is used to lift and lower materials. Cranes are commonly used in the ...   » Read the article

Encyclopedia - Amateur Telescope Making: Encyclopedia - Amateur Telescope Making
There is a strong tradition of amateur telescope making within the amateur astronomy community. The classic amateur telescope is the Newt...   » Read the article

Encyclopedia - Cassegrain Reflector: Encyclopedia - Cassegrain Reflector
First developed in 1672 by Laurent Cassegrain, a Cassegrain Telescope this type of reflector is a combination of a prime concave and a se...   » Read the article

Encyclopedia - Microscope: Encyclopedia - Microscope
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or ...   » Read the article

Encyclopedia - Anti-reflective Coating: Encyclopedia - Anti-reflective Coating
Anti-reflective or antireflection (AR) coatings are a type of optical coating applied to lenses and other devices to reduce reflection fr...   » Read the article

Encyclopedia - Aperture Synthesis: Encyclopedia - Aperture Synthesis
Aperture synthesis is a type of interferometry that mixes signals from a collection of instruments to produce measurements having the sam...   » Read the article

Encyclopedia - Gamma Virginis: Encyclopedia - Gamma Virginis
Gamma Virginis (γ Vir / γ Virginis) is a star in the constellation Virgo. It also has the traditional name Porrima. Gamma Virginis is a...   » Read the article

Encyclopedia - 1036 Ganymed: Encyclopedia - 1036 Ganymed
1036 Ganymed is the largest Amor asteroid. It was discovered by Walter Baade on October 23, 1924 and is named after Ganymede, the beautif...   » Read the article

Encyclopedia - Trombone: Encyclopedia - Trombone
Trumpet List of classical trombonists List of jazz trombonists A lip-reed aerophone with a predominantly cylindrical bore, the trombone i...   » Read the article

Encyclopedia - Amateur Astronomy: Encyclopedia - Amateur Astronomy
Amateur astronomy, often called back yard astronomy, is a hobby whose participants enjoy observing celestial objects. It is usually assoc...   » Read the article

Encyclopedia - Astronomical Seeing: Encyclopedia - Astronomical Seeing
Astronomical seeing refers to the blurring and twinkling of astronomical objects such as stars caused by the Earth's atmosphere. The astr...   » Read the article

Encyclopedia - 90 Antiope: Encyclopedia - 90 Antiope
Antiope is classified as a member of the Themis family of asteroids. One observed stellar occultation by Antiope has been reported, on (J...   » Read the article

Encyclopedia - 3 Juno: Encyclopedia - 3 Juno
3 Juno (jew'-noh) was the third asteroid to be discovered and is one of the largest main belt asteroids. It was was discovered on Septemb...   » Read the article

Encyclopedia - Barred Spiral Galaxy: Encyclopedia - Barred Spiral Galaxy
A barred spiral galaxy is a spiral galaxy with a band of bright stars emerging from the center and running across the middle of the galax...   » Read the article

Encyclopedia - Very Long Baseline Interferometry: Encyclopedia - Very Long Baseline Interferometry
Very Long Baseline Interferometry (VLBI) is a type of interferometry in which the data received at each antenna in the array is paired wi...   » Read the article

Encyclopedia - Skygazing: Encyclopedia Ii - Skygazing - The Observation With A Reflecting Telescope
A reflecting telescope is constituted not of lenses but of mirrors. It being less costly to manufacture, one can, for the price of a refr...   » Read the article

Encyclopedia - Skygazing: Encyclopedia Ii - Skygazing - Observations With A Refracting Telescope
A refracting telescope is an instrument that is constituted of one or several lenses and that focuses the luminous rays toward one point ...   » Read the article

Encyclopedia - Skygazing: Encyclopedia Ii - Skygazing - Binocular Gazing
Binoculars are very useful when you wish to observe bright, large astronomical objects. Thanks to them it is possible to see lunar crater...   » Read the article

Encyclopedia - Skygazing: Encyclopedia Ii - Skygazing - Naked Eye Skygazing
Skygazing - Diurnal observation. The extreme brightness of the Sun saturates the sky and prevents the observation of less luminous obje...   » Read the article

Encyclopedia - Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Technical Considerations
The primary mirror is the reflector telescope's basic optical element and creates an image at the focal plane. The distance from the mirr...   » Read the article

Encyclopedia - Radio Masts And Towers: Encyclopedia Ii - Radio Masts And Towers - Other Types Of Antenna Supports And Structures
Radio masts and towers - Poles. Shorter masts may consist of a self-supporting or guyed wooden pole, similar to a telegraph pole. Somet...   » Read the article

Encyclopedia - Telescope Mount: Encyclopedia Ii - Telescope Mount - Alt-az Mounts
Main article: Altazimuth mount The earliest types of mounts are today known as altitude-azimuth, or alt-az systems. The name refers to th...   » Read the article

Encyclopedia - Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Technical Considerations
A curved primary mirror is the reflector telescope's basic optical element and creates an image at the focal plane. The distance from the...   » Read the article

Encyclopedia - James Clerk Maxwell Telescope: Encyclopedia Ii - James Clerk Maxwell Telescope - Instrumentation
The JCMT carries two types of instruments - broadband continuum detectors and spectral-line receivers. The older continuum single pixel U...   » Read the article

Encyclopedia - Crane Machine: Encyclopedia Ii - Crane Machine - Mechanical Principles
Cranes illustrate the use of one or more simple machines to create mechanical advantage. The lever. A balance crane contains a horizonta...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - Compound Optical Microscope
The diagrams below show compound microscopes. In its simplest form—as used by Robert Hooke, for example—the compound microscope would...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - Stereo Microscope
The stereo, binocular or dissecting microscope is designed differently from the diagrams above, and serves a different purpose. It uses t...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - The Parts Of The Microscope
There are eleven main parts to a microscope. At the top of the microscope there is a cylinder that is called the ocular or eyepiece. That...   » Read the article

Encyclopedia - Radio Masts And Towers: Encyclopedia Ii - Radio Masts And Towers - Mast Or Tower?
The terms "mast" and "tower" are often used interchangeably. However: In engineering terms, a tower is a self-supporting or cantilevered...   » Read the article

Encyclopedia - Radio Masts And Towers: Encyclopedia Ii - Radio Masts And Towers - Materials
Radio masts and towers - Steel lattice. The steel lattice is the most widespread form of construction. It provides great strength, low ...   » Read the article

Encyclopedia - Radio Masts And Towers: Encyclopedia Ii - Radio Masts And Towers - Design Features
Radio masts and towers - Economic and aesthetic considerations. The cost of a mast or tower is roughly proportional to the square of i...   » Read the article

Encyclopedia - Crane Machine: Encyclopedia Ii - Crane Machine - Types Of Cranes
Crane machine - Ancient cranes. A carved stone relief [1] from the first or second century found in the tomb of the Haterii family in R...   » Read the article

Encyclopedia - Iron Sights: Encyclopedia Ii - Iron Sights - How Iron Sights Work
Iron sights work by providing horizontal and vertical reference points that allow the shooter to align the gun parallel to the shooter's ...   » Read the article

Encyclopedia - Iron Sights: Encyclopedia Ii - Iron Sights - Types Of Iron Sights
Iron sights are broken into two basic categories that include most types. Open sights use a notch of some sort as the rear sight, while a...   » Read the article

Encyclopedia - Open Cluster: Encyclopedia Ii - Open Cluster - Historical Observations
The most prominent open clusters such as the Pleiades have been known and recognised as groups of stars since antiquity. Others were know...   » Read the article

Encyclopedia - Iron Sights: Encyclopedia Ii - Iron Sights - Adjusting Iron Sights
Many iron sights are designed to be adjustable, so that the sights can be tuned to match a particular cartridge and distance. Even non-ad...   » Read the article

Encyclopedia - Iron Sights: Encyclopedia Ii - Iron Sights - Iron Sight Enhancements
While iron sights are basically very simple, that simplicity also leads to a staggering variety of different implementations. In addition...   » Read the article

Encyclopedia - Eyepiece: Encyclopedia Ii - Eyepiece - Eyepiece Designs
Technology has developed over time and there are a variety of eyepiece designs for use with optical telescopes. They vary in their intern...   » Read the article

Encyclopedia - Maser: Encyclopedia Ii - Maser - Uses
Masers serve as high precision frequency references. These "atomic frequency standards" are one form of atomic clock. They are also used ...   » Read the article

Encyclopedia - Metallic Silhouette: Encyclopedia Ii - Metallic Silhouette - Equipment
Silhouette shooting with modern rifles is split into categories by weight, so that heavier target rifles with bull barrels (see accurize)...   » Read the article

Encyclopedia - Milky Way: Encyclopedia Ii - Milky Way - Structure
As of 2005, the Milky Way is thought to comprise a large barred spiral galaxy of Hubble type SBbc (loosely wound barred spiral) with a to...   » Read the article

Encyclopedia - Milky Way: Encyclopedia Ii - Milky Way - Structure
As of 2005, the Milky Way is thought to comprise a large barred spiral galaxy of Hubble type SBbc (loosely wound barred spiral) with a to...   » Read the article

Encyclopedia - Coma Galaxy Cluster: Encyclopedia Ii - Coma Galaxy Cluster - Structure Of The Galaxy Cluster
The Cluster's mean distance from Earth is 140 Mpc (450 million light years). Its 10 brightest spiral galaxies have apparent magnitudes of...   » Read the article

Encyclopedia - M72 Law: Encyclopedia Ii - M72 Law - Description
The weapon consists of a rocket packed inside launcher made up of two tubes, one inside the other. While closed, the outer assembly acts ...   » Read the article

Encyclopedia - Isu-122: Encyclopedia Ii - Isu-122 - Construction And Design
Construction of ISU-122 and ISU-152 is the same except gun mounting, sights and ammunition stowage. The A-19S or D-25S cannons of ISU-122...   » Read the article

Encyclopedia - Laser Applications: Encyclopedia Ii - Laser Applications - Scientific
Laser applications - Spectroscopy. Most types of laser are an inherently pure source of light; they emit near-monochromatic light with ...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - Optical Resolution
A lens magnifies by bending light (see refraction). Optical microscopes are restricted in their ability to resolve features by a phenomen...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - History Of The Microscope
It is impossible to say who invented the compound microscope. Dutch spectacle-makers Hans Janssen and his son Zacharias Janssen are often...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - Optical Resolution
A lens magnifies by bending light (see refraction). Optical microscopes are restricted in their ability to resolve features by a phenomen...   » Read the article

Encyclopedia - Microscope: Encyclopedia Ii - Microscope - History Of The Microscope
It is impossible to say who invented the compound microscope. Dutch spectacle-makers Hans Janssen and his son Zacharias Janssen are often...   » Read the article

Encyclopedia - Freelancer Computer Game: Encyclopedia Ii - Freelancer Computer Game - Playing The Game
There are two distinct game environments; either the player is in space or landed on a planet or station. The space environment is visual...   » Read the article

Encyclopedia - Galaxy: Encyclopedia Ii - Galaxy - History
This account of the history of the investigation of our own and other galaxies is largely taken from [1]. In 1610, Galileo Galilei used a...   » Read the article

Encyclopedia - Diffraction: Encyclopedia Ii - Diffraction - Introduction
Diffraction is one particular type of wave interference, caused by the partial obstruction or lateral restriction of a wave. Not all inte...   » Read the article

Encyclopedia - Sniper Rifle: Encyclopedia Ii - Sniper Rifle - Features
The key feature of modern sniper rifles is precise placement of a bullet, often at comparatively long distances. Any purpose built design...   » Read the article

Encyclopedia - Aurora Astronomy: Encyclopedia Ii - Aurora Astronomy - Auroras On Other Planets
Both Jupiter and Saturn have magnetic fields much stronger than Earth's (Uranus, Neptune and Mercury are also magnetic), and both have la...   » Read the article

Encyclopedia - Aurora Astronomy: Encyclopedia Ii - Aurora Astronomy - Auroras On Other Planets
Both Jupiter and Saturn have magnetic fields much stronger than Earth's (Uranus, Neptune and Mercury are also magnetic), and both have la...   » Read the article

Encyclopedia - Optical Telescope: Encyclopedia Ii - Optical Telescope - How It Works
For detailed information on specific designs of reflecting and refracting telescopes, see the main articles on Reflecting telescopes and ...   » Read the article

Encyclopedia - Optical Telescope: Encyclopedia Ii - Optical Telescope - Research Telescopes
Nearly all large research-grade astronomical telescopes are reflectors. Some reasons are: In a lens the entire volume of material has to...   » Read the article

Encyclopedia - John Dobson Astronomer: Encyclopedia Ii - John Dobson Astronomer - Dobson's Time At The Monastery
John Dobson was an atheist through high school, but over time he came to believe that there was more to the Universe. He enquired about j...   » Read the article

Encyclopedia - Observational Astronomy: Encyclopedia Ii - Observational Astronomy - Observation Tools
The key instrument of nearly all modern observational astronomy is the telescope. This serves the dual purposes of gathering more light s...   » Read the article

Encyclopedia - Amateur Astronomy: Encyclopedia Ii - Amateur Astronomy - Beginning In Amateur Astronomy
There are a many ways for people to become involved in amateur astronomy and study the night sky. One option is to join a local astronomi...   » Read the article

Encyclopedia - Interstellar Cloud: Encyclopedia Ii - Interstellar Cloud - Chemical Compositions
Analysing the composition of interstellar clouds is achieved by studying electromagnetic radiation that we receive from them. Large radio...   » Read the article

Encyclopedia - Lens Optics: Encyclopedia Ii - Lens Optics - Multiple Lenses
Lenses may be combined to form more complex optical systems. The simplest case is when lenses are placed in contact: if the lenses of foc...   » Read the article

Encyclopedia - Reflecting Telescope: Encyclopedia Ii - Reflecting Telescope - Reflecting Telescope Designs
Reflecting telescope - Newtonian focus. The Newtonian usually has a paraboloid primary mirror but for small apertures, say 12cm or less...   » Read the article

Encyclopedia - Eyepiece: Encyclopedia Ii - Eyepiece - Eyepiece Properties
Several properties of an eyepiece are likely to be of interest to a user of an optical instrument, when comparing eyepieces and deciding ...   » Read the article

Encyclopedia - Observational Astronomy: Encyclopedia Ii - Observational Astronomy - Observing
A variety of data can be observed for each star. The position coordinates locate the star on the sky using the techniques of spherical as...   » Read the article

Encyclopedia - Globular Cluster M5: Encyclopedia Ii - Globular Cluster M5 - Discovery And Visibility
M5 is, under extremely good conditions, just visible to the naked eye as a faint "star" near the star 5 Serpentis. Binoculars or small te...   » Read the article

Encyclopedia - Gamma Ray Burst: Encyclopedia Ii - Gamma Ray Burst - Soft Gamma Repeater
A Soft gamma repeater is a type of magnetar which emits large bursts of gamma rays and X-rays at irregular intervals. The photons are les...   » Read the article

Encyclopedia - Astronomical Seeing: Encyclopedia Ii - Astronomical Seeing - Measures Of Astronomical Seeing
There are three common descriptions of the astronomical seeing conditions at an observatory: The FWHM of the seeing disc r0 and t0 The C...   » Read the article

Encyclopedia - 4 Vesta: Encyclopedia Ii - 4 Vesta - Surface Features
Some Vestian surface features have been resolved using the Hubble Space Telescope and ground based telescopes, e.g. the Keck Telescope. T...   » Read the article

Encyclopedia - 3 Juno: Encyclopedia Ii - 3 Juno - Characteristics
Juno is close to being the seventh largest asteroid (it cannot currently be ranked relative to 52 Europa, with a mass approximately 1.2% ...   » Read the article

Encyclopedia - 55 Cancri: Encyclopedia Ii - 55 Cancri - 55 Cancri B
55 Cancri B is a faint 13th magnitude red dwarf. Spectral type of the star is M4 V. It orbits the brighter component at a distance o...   » Read the article

Encyclopedia - Hd 209458 B: Encyclopedia Ii - Hd 209458 B - Detection Of The Atmosphere
On November 27, 2001 the Hubble Space Telescope detected sodium in the planet's atmosphere, the first planetary atmosphere outside our so...   » Read the article

Encyclopedia - Interferometry: Encyclopedia Ii - Interferometry - Interferometer
An interferometer works on the principle that two waves that coincide with the same phase will amplify each other while two waves that ha...   » Read the article

Encyclopedia - Goldfish: Encyclopedia Ii - Goldfish - Varieties Of Domesticated Goldfish
Selective breeding over centuries has produced several color variations, some of them far removed from the "golden" color of the original...   » Read the article

Encyclopedia - Red Dot Sight: Encyclopedia Ii - Red Dot Sight - Types Of Red Dot Sights
Some of the first red dot sights to appear were "occluded" sights; the image of the target was not visible through the sight. Looking int...   » Read the article

Encyclopedia - Astrophysics: Encyclopedia Ii - Astrophysics - Observational Astrophysics
Most astrophysical processes cannot be reproduced in laboratories on Earth. However, there is a huge variety of astronomical objects visi...   » Read the article

Encyclopedia - Astrophysics: Encyclopedia Ii - Astrophysics - Observational Astrophysics
Most astrophysical processes cannot be reproduced in laboratories on Earth. However, there is a huge variety of astronomical objects visi...   » Read the article

Encyclopedia - Galaxy: Encyclopedia Ii - Galaxy - Types Of Galaxies
Galaxies come in three main types: ellipticals, spirals, and irregulars. A slightly more extensive description of galaxy types based on t...   » Read the article

Encyclopedia - Aristarchus Crater: Encyclopedia Ii - Aristarchus Crater - Remote Sensing
In 1911, Professor Robert W. Wood used ultraviolet photography to take images of the crater area. He discovered the plateau had an anomal...   » Read the article

Encyclopedia - 3 Juno: Encyclopedia Ii - 3 Juno - Observations
Image:3 juno.jpg Some notable observation milestones for Juno include: Juno was the first asteroid for which an occultation was observed....   » Read the article

Encyclopedia - Andromeda Galaxy: Encyclopedia Ii - Andromeda Galaxy - Observation
The Andromeda Galaxy was observed in 964 by the Persian astronomer 'Abd Al-Rahman Al Sufi, who described it as a "small cloud". The first...   » Read the article

Encyclopedia - Andromeda Galaxy: Encyclopedia Ii - Andromeda Galaxy - Observation
The Andromeda Galaxy was observed in 964 by the Persian astronomer 'Abd Al-Rahman Al Sufi, who described it as a "small cloud". The first...   » Read the article

Encyclopedia - Taurus Constellation: Encyclopedia Ii - Taurus Constellation - Notable Deep Sky Objects
In the east of the constellation lies one of the best known open clusters, easily visible to the eye, the Pleiades. Behind Aldebaran lie ...   » Read the article

Encyclopedia - Ursa Major: Encyclopedia Ii - Ursa Major - History
Ursa Major was one of the 48 constellations listed by Ptolemy. It is one of the most widely-known constellations, having been mentioned b...   » Read the article

Encyclopedia - Cat's Eye Nebula: Encyclopedia Ii - Cat's Eye Nebula - Distance
A long standing problem in the study of planetary nebulae is that their distances are generally not well known. Many methods for estimati...   » Read the article

Encyclopedia - Hd 187123: Encyclopedia Ii - Hd 187123 - Hd 187123 B
HD 187123 b is a typical "hot Jupiter". It has a mass about half that of Jupiter and it orbits in a very tight, round orbit around the st...   » Read the article

Encyclopedia - 4 Vesta: Encyclopedia Ii - 4 Vesta - Further Details
The V-type asteroid 1929 Kollaa was determined to have a composition akin to cumulate eucrite meteorites, indicating its origin deep with...   » Read the article

Dictionary - Telescope Dreams Symbol: Christian Dream Interpretation Dictionary - Telescope
Telescope: Seeing into the future; making a small problem bigger. (Rev. 4:1)   (Source: Tehillah Ministries)   Related pages...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - History
The first telescopes may have been Assyrian crystal lenses. Article The Visby lenses tentatively suggest that the technology was known to...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - History
The first telescopes may have been Assyrian crystal lenses. Article Though the Visby lenses tentatively suggest that the technology was k...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Research Telescopes
Most large research telescopes can operate as either a Cassegrain telescope (longer focal length, and a narrower field with higher magnif...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Research Telescopes
Most large research telescopes can operate as either a cassegrain telescope (longer focal length, and a narrower field with higher magnif...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Telescope Mountings
A simple telescope mount is an altitude-azimuth or altazimuth mount. It is similar to that of a surveying transit. A fork rotates in azim...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Telescope Mountings
A simple telescope mount is an altitude-azimuth or altazimuth mount. It is similar to that of a surveying transit. A fork rotates in azim...   » Read the article

Encyclopedia - Telescope: Encyclopedia Ii - Telescope - Imperfect Images
No telescope can form a perfect image. Even if a reflecting telescope could have a perfect mirror, or a refracting telescope could have a...   » Read the article

Article - Popular Pages Sitemap V - T
This is a sitemap for Popular Pages V - T . Click on a link and you will find multiple definitions and articles related to the word. &...   » Read the article