Telescope types, observing techniques, and famous observatories and space telescopes.
30 cards · basic cards · AI-written, checked twice. Edit anything.
- What type of telescope uses lenses to focus light?
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Refractor telescope- What type of telescope uses a curved mirror to focus light?
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Reflector telescope- What type of telescope combines mirrors and lenses?
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Catadioptric telescope- What is aperture in a telescope?
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The diameter of the telescope's primary lens or mirror- How does increasing aperture affect light-gathering power?
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Larger aperture collects more light, allowing fainter objects to be observed- What is focal length in a telescope?
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The distance from the primary lens or mirror to the point where light converges to a focus- What is angular resolution in a telescope?
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The smallest angular separation between two objects that can be distinguished as separate- Which optical phenomenon limits a ground-based telescope's resolution?
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Atmospheric seeing, caused by turbulence in Earth's atmosphere- What is adaptive optics in telescopes?
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A technology that corrects for atmospheric distortion using a deformable mirror and a reference star- What observational technique measures the brightness of celestial objects?
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Photometry- What observational technique splits light into its component wavelengths?
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Spectroscopy- What does spectroscopy reveal about a star?
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Its composition, temperature, density, and motion (radial velocity)- What is interferometry in astronomy?
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A technique combining light from multiple telescopes to achieve higher angular resolution- What causes redshift in astronomical observations?
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The motion of an object away from the observer or the expansion of the universe- What is light pollution?
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Excessive artificial light that reduces visibility of stars and faints objects
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