A primary astronomy .. . 114. What is the Celestial Sphere ?It is the apparently concave surface of the heavens, in whichthe stars seem to be set, andwhich surrounds the globe onevery side. [The relation of the Terrestrial to the Celes-tial Sphere may be understood by the annexeddiagram, in which the stars surround the earthin all directions, as they seem to fill the wholecelestial vault.] 115. What is the Equinoctial ?It is the Celestial Equator, or the plane of the earths equator extend-ed in every direction to the starryheavens. 116. What is Declination ?It is apparent distance either north
A primary astronomy .. . 114. What is the Celestial Sphere ?It is the apparently concave surface of the heavens, in whichthe stars seem to be set, andwhich surrounds the globe onevery side. [The relation of the Terrestrial to the Celes-tial Sphere may be understood by the annexeddiagram, in which the stars surround the earthin all directions, as they seem to fill the wholecelestial vault.] 115. What is the Equinoctial ?It is the Celestial Equator, or the plane of the earths equator extend-ed in every direction to the starryheavens. 116. What is Declination ?It is apparent distance either north or south of the Equinoctial. [Declination is the same to the heavens that latitude is to the earth.] 117. What is Right Ascension ? THE PRIMARY ASTRONOMY. 29 It is distance east of a given point, and is reckonedon the Equinoctial quite around the heavens. [hi one respect Right Ascension in the heavens is like longitude on the earth:they are both reckoned upon the equators of their respective spheres; but whilelongitude is reckoned both east and west of the first meridian, and can only amount to180°, Right Ascension is reckoned only eastward, and consequently may amount to360°, or the whole circle of the heavens. The principal difference between Right As-cension and Celestial Longitude is, that the former is reckoned on the Equinoctial,and the latter on the Ecliptic] FIRST GRAND DIVISIONS OF THE UNIVERSE. 118. What does the term Universe signify ? The whole system of creation; or every thing visibleand invisible in heaven and earth. 119. How is the Universe divided?Into Matter and Spirit 120. What do you understand by Matter ? It is any thing that you can see or feel, or that haslength, breadth, and thickness. [Of th
Size: 1598px × 1563px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectastronomy, bookyear18
