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  2. Amateur telescope making - Wikipedia

    en.wikipedia.org/wiki/Amateur_telescope_making

    Amateur telescope making is the activity of building telescopes as a hobby, as opposed to being a paid professional. Amateur telescope makers (sometimes called ATMs) build their instruments for personal enjoyment of a technical challenge, as a way to obtain an inexpensive or personally customized telescope, or as a research tool in the field of ...

  3. Build the Earth - Wikipedia

    en.wikipedia.org/wiki/Build_the_Earth

    Aerial render of the Build The Earth project on a modified Airocean World Map. Build the Earth was created by YouTuber PippenFTS in March 2020 as a collaborative effort to recreate Earth in the video game Minecraft. [1] During the COVID-19 lockdowns, the server aimed to provide players with the opportunity to virtually experience and construct ...

  4. Arecibo Telescope - Wikipedia

    en.wikipedia.org/wiki/Arecibo_Telescope

    The Arecibo Telescope was a 305 m (1,000 ft) spherical reflector radio telescope built into a natural sinkhole at the Arecibo Observatory located near Arecibo, Puerto Rico. A cable-mount steerable receiver and several radar transmitters for emitting signals were mounted 150 m (492 ft) above the dish .

  5. Hubble Space Telescope - Wikipedia

    en.wikipedia.org/wiki/Hubble_Space_Telescope

    The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.

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  7. List of telescope parts and construction - Wikipedia

    en.wikipedia.org/wiki/List_of_telescope_parts...

    Telecompressor or focal reducer: Optical element to decrease the telescope's focal length and magnification (usually by a fixed percentage) and widen the field of view, providing opposite effects of a Barlow lens. Star Diagonal: Used to change the angle of the light coming out of a telescope, for easier viewing.

  8. Three-mirror anastigmat - Wikipedia

    en.wikipedia.org/wiki/Three-mirror_anastigmat

    The Vera C. Rubin Observatory's telescope (formerly known as Large Synoptic Survey Telescope) is an Eisenberg-Pearson design with an additional refractive corrector. The KH-11 Kennen (or perhaps the now cancelled Future Imagery Architecture ) telescopes may be a three-mirror anastigmat, since the spare telescopes given to NASA by the National ...

  9. John Dobson (amateur astronomer) - Wikipedia

    en.wikipedia.org/wiki/John_Dobson_(amateur...

    For instance, a telescope was referred to as a "geranium", which is a type of flower. A "potted geranium" referred to a telescope in a tube and rocker, while a "geranium in bloom" referred to a telescope whose mirror was now aluminized. [5] Eventually Dobson was given the option of ceasing his telescope building or leaving the order. He chose ...