{"id":601,"date":"2022-03-02T17:44:40","date_gmt":"2022-03-02T17:44:40","guid":{"rendered":"https:\/\/pressbooks.ccconline.org\/astronomy\/?post_type=chapter&p=601"},"modified":"2022-03-02T17:44:40","modified_gmt":"2022-03-02T17:44:40","slug":"key-terms-17","status":"publish","type":"chapter","link":"https:\/\/pressbooks.ccconline.org\/astronomy\/chapter\/key-terms-17\/","title":{"raw":"Key Terms","rendered":"Key Terms"},"content":{"raw":"
\r\n
\r\n \t
cepheid<\/dt>\r\n \t
a star that belongs to a class of yellow supergiant pulsating stars; these stars vary periodically in brightness, and the relationship between their periods and luminosities is useful in deriving distances to them<\/dd>\r\n<\/dl>\r\n
\r\n \t
light curve<\/dt>\r\n \t
a graph that displays the time variation of the light from a variable or eclipsing binary star or, more generally, from any other object whose radiation output changes with time<\/dd>\r\n<\/dl>\r\n
\r\n \t
luminosity class<\/dt>\r\n \t
a classification of a star according to its luminosity within a given spectral class; our Sun, a G2V star, has luminosity class V, for example<\/dd>\r\n<\/dl>\r\n
\r\n \t
parallax<\/dt>\r\n \t
an apparent displacement of a nearby star that results from the motion of Earth around the Sun<\/dd>\r\n<\/dl>\r\n
\r\n \t
parsec<\/dt>\r\n \t
a unit of distance in astronomy, equal to 3.26 light-years; at a distance of 1 parsec, a star has a parallax of 1 arcsecond<\/dd>\r\n<\/dl>\r\n
\r\n \t
period-luminosity relation<\/dt>\r\n \t
an empirical relation between the periods and luminosities of certain variable stars<\/dd>\r\n<\/dl>\r\n
\r\n \t
pulsating variable star<\/dt>\r\n \t
a variable star that pulsates in size and luminosity<\/dd>\r\n<\/dl>\r\n
\r\n \t
RR Lyrae<\/dt>\r\n \t
one of a class of giant pulsating stars with periods shorter than 1 day, useful for finding distances<\/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\/19-key-terms under a Creative Commons Attribution License 4.0<\/a><\/div>\r\n
Access the entire book for free at\u00a0https:\/\/openstax.org\/books\/astronomy\/pages\/1-introduction<\/a><\/div>","rendered":"
\n
\n
cepheid<\/dt>\n
a star that belongs to a class of yellow supergiant pulsating stars; these stars vary periodically in brightness, and the relationship between their periods and luminosities is useful in deriving distances to them<\/dd>\n<\/dl>\n
\n
light curve<\/dt>\n
a graph that displays the time variation of the light from a variable or eclipsing binary star or, more generally, from any other object whose radiation output changes with time<\/dd>\n<\/dl>\n
\n
luminosity class<\/dt>\n
a classification of a star according to its luminosity within a given spectral class; our Sun, a G2V star, has luminosity class V, for example<\/dd>\n<\/dl>\n
\n
parallax<\/dt>\n
an apparent displacement of a nearby star that results from the motion of Earth around the Sun<\/dd>\n<\/dl>\n
\n
parsec<\/dt>\n
a unit of distance in astronomy, equal to 3.26 light-years; at a distance of 1 parsec, a star has a parallax of 1 arcsecond<\/dd>\n<\/dl>\n
\n
period-luminosity relation<\/dt>\n
an empirical relation between the periods and luminosities of certain variable stars<\/dd>\n<\/dl>\n
\n
pulsating variable star<\/dt>\n
a variable star that pulsates in size and luminosity<\/dd>\n<\/dl>\n
\n
RR Lyrae<\/dt>\n
one of a class of giant pulsating stars with periods shorter than 1 day, useful for finding distances<\/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\/19-key-terms under a Creative Commons Attribution License 4.0<\/a><\/div>\n
Access the entire book for free at\u00a0https:\/\/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-601","chapter","type-chapter","status-publish","hentry","chapter-type-numberless"],"part":591,"_links":{"self":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/601","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\/601\/revisions"}],"predecessor-version":[{"id":602,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/601\/revisions\/602"}],"part":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/591"}],"metadata":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/601\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/media?parent=601"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapter-type?post=601"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/contributor?post=601"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/license?post=601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}