### device | instrument | magnifier:

Telescope
* All telescopes collect light and magnify it.
* All telescopes have two axes rotation that are perpendicular to each other
  - axis rotation that are perpendicular to each other
* Every telescope has at least some level of optical aberration
  - either a primary lens or mirror that is used for collecting light
* Many telescopes appear tilted so that the frame lines up with the celestial poles
  - are Earth-based, located in astronomical observatories around the world
* Many telescopes have a miniature telescope attached to the side
  - adjustable collimation
* Most telescopes are on the ground
  - become aperture
  - consist of sensors
  - create images
  - detect light
  - enable astronomers
* Most telescopes focus light
  - visible light
* Most telescopes have a finderscope attached to the side to help aim it
  - angular resolution
  - glass lenses
* Most telescopes have high angular resolution
  - mirrors
  - power
  - rather narrow fields of view
  - secondary mirrors
  - help people see things visually
  - produce diffraction
* Most telescopes use extra lenses
* Some telescopes can look at wide areas of the sky at once
  - measure the heat coming from the things in the sky
  - come with pole-finding reticles for their finderscopes
* Some telescopes detect flashes
  - radiation
* Some telescopes have another set of lenses that turn the image upright
  - detectors
  - dishes
  - eyepiece holders
  - radar transmitters
  - mount on platforms
  - reverse left and right, as well as invert the image
* Some telescopes use different size eyepieces
  * A 'telescope' is an important tool for astronomy that gathers and focuses light. Some do this with curved mirrors, some with curved lenses, and some with both. Telescopes make far-away things look bigger, brighter and closer. Galileo was the first person to use a telescope for astronomy, but he did not invent them. The first telescope was invented in the Netherlands in 1608. Some telescopes, not mainly used for astronomy, are 'binoculars,' 'camera lenses', or 'spyglasses'
* Uses a large lenses to gather light.
* also use a two number system, but they represent different metrics.
* are big visual funnels, pouring more and more photons into the observer s eye
  - compound lens systems which allow high levels of magnification at greater distance
  - devices that help astronomers overcome the limitations of the human eye
  - important tools for astronomers to collect light
  - light buckets, or light funnels, more than image magnifiers
  - limited to the observation of heavenly bodies and phenomena
  - precision instruments, and very price competitive
  - the tools of the astronomers to study the unverse
  - timeless gifts that keep on giving
* bend light.
* can also enlarge objects that are relatively close to the Earth
  - be simple as well as complex
* collect and focus radiation.
* come in many different sizes
  - two basic types - refractors and reflectors
* differ widely, depending upon the type of radiation that they are designed to detect.
* extend that vision to see distant stars and galaxies.
* gather light by means of their primary and secondary mirrors
  - from the stars and planets with a mirror or lens called an objective
  - in one of two ways
* have angular resolution
  - attachment
  - bulging eyes, and Celestials have eyes that look straight up
  - capability
  - focal ratios based on diameter
  - magnification and a small field of view - just the opposite of binoculars
  - resolve power
* includes aperture
  - sections
* make far-away things look bigger , brighter and closer
  - objects look bigger, closer, brighter
  - stars and planets look bigger
* often show the image upside down and some show the image reversed from left to right.
* range in power and size.
* rely on the interaction between energy and matter
  - principles of aperture to help people see far-off objects in space
* scientific instrument
* see only a small part of the sky, and meteors appear in random spots.
* show a round patch of light bright in the center and fading toward the edges
  - small fuzzy ball of light, bright in the center fading to the edges
  - details
  - the light of stars millions or billions of light-years away
* take all the light in a big area and put in into a small area.
  - light to see things
* usually come with a selection of eyepieces that offer low, medium and high powers
* usually wobble a little after moving
  - some after moving
* vary in price, depending on the style, size, and quality
  - widely in price
* work by capturing, and rendering light to a common focus point
  - gathering light, and by magnification
  - in the same way except they collect light
+ Astronomy, Methodology, Instrumentation
  * Telescopes take all the light in a big area and put in into a small area. This is like making your eyes very big and powerful. Astronomers use telescopes to look at things that are far away and dim. Telescopes make objects look bigger, closer, brighter.