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  2. List of astronomical instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    Telescope: instrument that makes distant objects appear magnified; Torquetum: medieval astronomical instrument; Triquetrum: ancient astronomical instrument; Volvelle: paper construct with rotating parts, may be considered a subclass of slide chart or movable book; Zenith telescope: type of telescope that points straight up

  3. Observational astronomy - Wikipedia

    en.wikipedia.org/wiki/Observational_astronomy

    Mayall telescope at Kitt Peak National Observatory An assembly in Estonia to observe meteors. Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models.

  4. Optical telescope - Wikipedia

    en.wikipedia.org/wiki/Optical_telescope

    The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.

  5. List of space telescopes - Wikipedia

    en.wikipedia.org/wiki/List_of_space_telescopes

    Positioning an optical telescope in space eliminates the distortions and limitations that hamper that ground-based optical telescopes (see Astronomical seeing), providing higher resolution images. Optical telescopes are used to look at planets, stars, galaxies, planetary nebulae and protoplanetary disks, amongst many other things. [150]

  6. Telescope - Wikipedia

    en.wikipedia.org/wiki/Telescope

    The 100-inch (2.54 m) Hooker reflecting telescope at Mount Wilson Observatory near Los Angeles, USA, used by Edwin Hubble to measure galaxy redshifts and discover the general expansion of the universe. A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. [1]

  7. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth. The techniques ...

  8. Largest celestial object of its kind discovered in the ...

    www.aol.com/largest-celestial-object-kind...

    With the help of two powerful radio telescopes, astronomers spotted the gigantic two-lobed jet, which spans at least 200,000 light-years. A light-year is the distance light travels in one year, ...

  9. Astrometry - Wikipedia

    en.wikipedia.org/wiki/Astrometry

    Astronomers use astrometric techniques for the tracking of near-Earth objects. Astrometry is responsible for the detection of many record-breaking Solar System objects. To find such objects astrometrically, astronomers use telescopes to survey the sky and large-area cameras to take pictures at various determined intervals.

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