{"id":317,"date":"2022-02-11T17:46:24","date_gmt":"2022-02-11T17:46:24","guid":{"rendered":"https:\/\/pressbooks.ccconline.org\/astronomy\/?post_type=chapter&p=317"},"modified":"2022-02-11T17:46:24","modified_gmt":"2022-02-11T17:46:24","slug":"key-terms-4","status":"publish","type":"chapter","link":"https:\/\/pressbooks.ccconline.org\/astronomy\/chapter\/key-terms-4\/","title":{"raw":"Key Terms","rendered":"Key Terms"},"content":{"raw":"
\r\n
\r\n \t
adaptive optics<\/dt>\r\n \t
systems used with telescopes that can compensate for distortions in an image introduced by the atmosphere, thus resulting in sharper images<\/dd>\r\n<\/dl>\r\n
\r\n \t
aperture<\/dt>\r\n \t
diameter of the primary lens or mirror of a telescope<\/dd>\r\n<\/dl>\r\n
\r\n \t
charge-coupled device (CCD)<\/dt>\r\n \t
array of high-sensitivity electronic detectors of electromagnetic radiation, used at the focus of a telescope (or camera lens) to record an image or spectrum<\/dd>\r\n<\/dl>\r\n
\r\n \t
chromatic aberration<\/dt>\r\n \t
distortion that causes an image to appear fuzzy when each wavelength coming into a transparent material focuses at a different spot<\/dd>\r\n<\/dl>\r\n
\r\n \t
detector<\/dt>\r\n \t
device sensitive to electromagnetic radiation that makes a record of astronomical observations<\/dd>\r\n<\/dl>\r\n
\r\n \t
eyepiece<\/dt>\r\n \t
magnifying lens used to view the image produced by the objective lens or primary mirror of a telescope<\/dd>\r\n<\/dl>\r\n
\r\n \t
focus<\/dt>\r\n \t
(of telescope) point where the rays of light converged by a mirror or lens meet<\/dd>\r\n<\/dl>\r\n
\r\n \t
interference<\/dt>\r\n \t
process in which waves mix together such that their crests and troughs can alternately reinforce and cancel one another<\/dd>\r\n<\/dl>\r\n
\r\n \t
interferometer<\/dt>\r\n \t
instrument that combines electromagnetic radiation from one or more telescopes to obtain a resolution equivalent to what would be obtained with a single telescope with a diameter equal to the baseline separating the individual separate telescopes<\/dd>\r\n<\/dl>\r\n
\r\n \t
interferometer array<\/dt>\r\n \t
combination of multiple radio dishes to, in effect, work like a large number of two-dish interferometers<\/dd>\r\n<\/dl>\r\n
\r\n \t
prime focus<\/dt>\r\n \t
point in a telescope where the objective lens or primary mirror focuses the light<\/dd>\r\n<\/dl>\r\n
\r\n \t
radar<\/dt>\r\n \t
technique of transmitting radio waves to an object and then detecting the radiation that the object reflects back to the transmitter; used to measure the distance to, and motion of, a target object or to form images of it<\/dd>\r\n<\/dl>\r\n
\r\n \t
reflecting telescope<\/dt>\r\n \t
telescope in which the principal light collector is a concave mirror<\/dd>\r\n<\/dl>\r\n
\r\n \t
refracting telescope<\/dt>\r\n \t
telescope in which the principal light collector is a lens or system of lenses<\/dd>\r\n<\/dl>\r\n
\r\n \t
resolution<\/dt>\r\n \t
detail in an image; specifically, the smallest angular (or linear) features that can be distinguished<\/dd>\r\n<\/dl>\r\n
\r\n \t
seeing<\/dt>\r\n \t
unsteadiness of Earth\u2019s atmosphere, which blurs telescopic images; good seeing means the atmosphere is steady<\/dd>\r\n<\/dl>\r\n
\r\n \t
telescope<\/dt>\r\n \t
instrument for collecting visible-light or other electromagnetic radiation<\/dd>\r\n<\/dl>\r\n<\/div>\r\n
This book was adapted from the following: Fraknoi, A., Morrison, D., & Wolff, S. C. (2016). Key Terms. In Astronomy<\/i>. OpenStax. https:\/\/openstax.org\/books\/astronomy\/pages\/6-key-terms under a Creative Commons Attribution License 4.0<\/a><\/div>\r\n
Access the entire book for free at https:\/\/openstax.org\/books\/astronomy\/pages\/1-introduction<\/a><\/div>","rendered":"
\n
\n
adaptive optics<\/dt>\n
systems used with telescopes that can compensate for distortions in an image introduced by the atmosphere, thus resulting in sharper images<\/dd>\n<\/dl>\n
\n
aperture<\/dt>\n
diameter of the primary lens or mirror of a telescope<\/dd>\n<\/dl>\n
\n
charge-coupled device (CCD)<\/dt>\n
array of high-sensitivity electronic detectors of electromagnetic radiation, used at the focus of a telescope (or camera lens) to record an image or spectrum<\/dd>\n<\/dl>\n
\n
chromatic aberration<\/dt>\n
distortion that causes an image to appear fuzzy when each wavelength coming into a transparent material focuses at a different spot<\/dd>\n<\/dl>\n
\n
detector<\/dt>\n
device sensitive to electromagnetic radiation that makes a record of astronomical observations<\/dd>\n<\/dl>\n
\n
eyepiece<\/dt>\n
magnifying lens used to view the image produced by the objective lens or primary mirror of a telescope<\/dd>\n<\/dl>\n
\n
focus<\/dt>\n
(of telescope) point where the rays of light converged by a mirror or lens meet<\/dd>\n<\/dl>\n
\n
interference<\/dt>\n
process in which waves mix together such that their crests and troughs can alternately reinforce and cancel one another<\/dd>\n<\/dl>\n
\n
interferometer<\/dt>\n
instrument that combines electromagnetic radiation from one or more telescopes to obtain a resolution equivalent to what would be obtained with a single telescope with a diameter equal to the baseline separating the individual separate telescopes<\/dd>\n<\/dl>\n
\n
interferometer array<\/dt>\n
combination of multiple radio dishes to, in effect, work like a large number of two-dish interferometers<\/dd>\n<\/dl>\n
\n
prime focus<\/dt>\n
point in a telescope where the objective lens or primary mirror focuses the light<\/dd>\n<\/dl>\n
\n
radar<\/dt>\n
technique of transmitting radio waves to an object and then detecting the radiation that the object reflects back to the transmitter; used to measure the distance to, and motion of, a target object or to form images of it<\/dd>\n<\/dl>\n
\n
reflecting telescope<\/dt>\n
telescope in which the principal light collector is a concave mirror<\/dd>\n<\/dl>\n
\n
refracting telescope<\/dt>\n
telescope in which the principal light collector is a lens or system of lenses<\/dd>\n<\/dl>\n
\n
resolution<\/dt>\n
detail in an image; specifically, the smallest angular (or linear) features that can be distinguished<\/dd>\n<\/dl>\n
\n
seeing<\/dt>\n
unsteadiness of Earth\u2019s atmosphere, which blurs telescopic images; good seeing means the atmosphere is steady<\/dd>\n<\/dl>\n
\n
telescope<\/dt>\n
instrument for collecting visible-light or other electromagnetic radiation<\/dd>\n<\/dl>\n<\/div>\n
This book was adapted from the following: Fraknoi, A., Morrison, D., & Wolff, S. C. (2016). Key Terms. In Astronomy<\/i>. OpenStax. https:\/\/openstax.org\/books\/astronomy\/pages\/6-key-terms under a Creative Commons Attribution License 4.0<\/a><\/div>\n
Access the entire book for free at https:\/\/openstax.org\/books\/astronomy\/pages\/1-introduction<\/a><\/div>\n","protected":false},"author":33,"menu_order":11,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[48],"contributor":[],"license":[],"class_list":["post-317","chapter","type-chapter","status-publish","hentry","chapter-type-numberless"],"part":303,"_links":{"self":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/317","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/users\/33"}],"version-history":[{"count":1,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/317\/revisions"}],"predecessor-version":[{"id":318,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/317\/revisions\/318"}],"part":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/303"}],"metadata":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/317\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/media?parent=317"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapter-type?post=317"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/contributor?post=317"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/license?post=317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}