{"id":245,"date":"2022-02-11T16:28:57","date_gmt":"2022-02-11T16:28:57","guid":{"rendered":"https:\/\/pressbooks.ccconline.org\/astronomy\/?post_type=chapter&p=245"},"modified":"2022-02-11T16:30:52","modified_gmt":"2022-02-11T16:30:52","slug":"key-terms-2","status":"publish","type":"chapter","link":"https:\/\/pressbooks.ccconline.org\/astronomy\/chapter\/key-terms-2\/","title":{"raw":"Key Terms","rendered":"Key Terms"},"content":{"raw":"
\r\n \t
apparent solar time<\/dt>\r\n \t
time as measured by the position of the Sun in the sky (the time that would be indicated by a sundial)<\/dd>\r\n<\/dl>\r\n
\r\n \t
declination<\/dt>\r\n \t
the angular distance north or south of the celestial equator<\/dd>\r\n<\/dl>\r\n
\r\n \t
great circle<\/dt>\r\n \t
a circle on the surface of a sphere that is the curve of intersection of the sphere with a plane passing through its center<\/dd>\r\n<\/dl>\r\n
\r\n \t
International Date Line<\/dt>\r\n \t
an arbitrary line on the surface of Earth near longitude 180\u00b0 across which the date changes by one day<\/dd>\r\n<\/dl>\r\n
\r\n \t
lunar eclipse<\/dt>\r\n \t
an eclipse of the Moon, in which the Moon moves into the shadow of Earth; lunar eclipses can occur only at the time of full moon<\/dd>\r\n<\/dl>\r\n
\r\n \t
mean solar time<\/dt>\r\n \t
time based on the rotation of Earth; mean solar time passes at a constant rate, unlike apparent solar time<\/dd>\r\n<\/dl>\r\n
\r\n \t
meridian<\/dt>\r\n \t
a great circle on the terrestrial or celestial sphere that passes through the poles<\/dd>\r\n<\/dl>\r\n
\r\n \t
phases of the Moon<\/dt>\r\n \t
the different appearance of light and dark on the Moon as seen from Earth during its monthly cycle, from new moon to full moon and back to new moon<\/dd>\r\n<\/dl>\r\n
\r\n \t
right ascension<\/dt>\r\n \t
the coordinate for measuring the east-west positions of celestial bodies; the angle measured eastward along the celestial equator from the vernal equinox to the hour circle passing through a body<\/dd>\r\n<\/dl>\r\n
\r\n \t
sidereal day<\/dt>\r\n \t
Earth\u2019s rotation period as defined by the positions of the stars in the sky; the time between successive passages of the same star through the meridian<\/dd>\r\n<\/dl>\r\n
\r\n \t
sidereal month<\/dt>\r\n \t
the period of the Moon\u2019s revolution about Earth measured with respect to the stars<\/dd>\r\n<\/dl>\r\n
\r\n \t
solar day<\/dt>\r\n \t
Earth\u2019s rotation period as defined by the position of the Sun in the sky; the time between successive passages of the Sun through the meridian<\/dd>\r\n<\/dl>\r\n
\r\n \t
solar eclipse<\/dt>\r\n \t
an eclipse of the Sun by the Moon, caused by the passage of the Moon in front of the Sun; solar eclipses can occur only at the time of the new moon<\/dd>\r\n<\/dl>\r\n
\r\n \t
solar month<\/dt>\r\n \t
the time interval in which the phases repeat\u2014say, from full to full phase<\/dd>\r\n<\/dl>\r\n
\r\n \t
synchronous rotation<\/dt>\r\n \t
when a body (for example, the Moon) rotates at the same rate that it revolves around another body<\/dd>\r\n<\/dl>\r\n
\r\n \t
tides<\/dt>\r\n \t
alternate rising and falling of sea level caused by the difference in the strength of the Moon\u2019s gravitational pull on different parts of Earth<\/dd>\r\n<\/dl>\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\/4-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
apparent solar time<\/dt>\n
time as measured by the position of the Sun in the sky (the time that would be indicated by a sundial)<\/dd>\n<\/dl>\n
\n
declination<\/dt>\n
the angular distance north or south of the celestial equator<\/dd>\n<\/dl>\n
\n
great circle<\/dt>\n
a circle on the surface of a sphere that is the curve of intersection of the sphere with a plane passing through its center<\/dd>\n<\/dl>\n
\n
International Date Line<\/dt>\n
an arbitrary line on the surface of Earth near longitude 180\u00b0 across which the date changes by one day<\/dd>\n<\/dl>\n
\n
lunar eclipse<\/dt>\n
an eclipse of the Moon, in which the Moon moves into the shadow of Earth; lunar eclipses can occur only at the time of full moon<\/dd>\n<\/dl>\n
\n
mean solar time<\/dt>\n
time based on the rotation of Earth; mean solar time passes at a constant rate, unlike apparent solar time<\/dd>\n<\/dl>\n
\n
meridian<\/dt>\n
a great circle on the terrestrial or celestial sphere that passes through the poles<\/dd>\n<\/dl>\n
\n
phases of the Moon<\/dt>\n
the different appearance of light and dark on the Moon as seen from Earth during its monthly cycle, from new moon to full moon and back to new moon<\/dd>\n<\/dl>\n
\n
right ascension<\/dt>\n
the coordinate for measuring the east-west positions of celestial bodies; the angle measured eastward along the celestial equator from the vernal equinox to the hour circle passing through a body<\/dd>\n<\/dl>\n
\n
sidereal day<\/dt>\n
Earth\u2019s rotation period as defined by the positions of the stars in the sky; the time between successive passages of the same star through the meridian<\/dd>\n<\/dl>\n
\n
sidereal month<\/dt>\n
the period of the Moon\u2019s revolution about Earth measured with respect to the stars<\/dd>\n<\/dl>\n
\n
solar day<\/dt>\n
Earth\u2019s rotation period as defined by the position of the Sun in the sky; the time between successive passages of the Sun through the meridian<\/dd>\n<\/dl>\n
\n
solar eclipse<\/dt>\n
an eclipse of the Sun by the Moon, caused by the passage of the Moon in front of the Sun; solar eclipses can occur only at the time of the new moon<\/dd>\n<\/dl>\n
\n
solar month<\/dt>\n
the time interval in which the phases repeat\u2014say, from full to full phase<\/dd>\n<\/dl>\n
\n
synchronous rotation<\/dt>\n
when a body (for example, the Moon) rotates at the same rate that it revolves around another body<\/dd>\n<\/dl>\n
\n
tides<\/dt>\n
alternate rising and falling of sea level caused by the difference in the strength of the Moon\u2019s gravitational pull on different parts of Earth<\/dd>\n<\/dl>\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\/4-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":8,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[48],"contributor":[],"license":[],"class_list":["post-245","chapter","type-chapter","status-publish","hentry","chapter-type-numberless"],"part":222,"_links":{"self":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/245","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":2,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/245\/revisions"}],"predecessor-version":[{"id":251,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/245\/revisions\/251"}],"part":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/222"}],"metadata":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapters\/245\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/media?parent=245"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/chapter-type?post=245"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/contributor?post=245"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/license?post=245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}