| 释义 |
perigee Astr.|ˈpɛrɪdʒiː|
Forms: see below.
[In current form, a. F. périgée (1557 in Hatz.-Darm.), ad. 15–16th c. L. perigēum, perigæum (cf. musée:—musæum, etc.), ad. late Gr. περίγειον, in Ptolemy, ‘perigee’, neuter of περίγειος adj., ‘close around the earth’, f. περί around + γέα, γῆ the earth. In earlier Eng. use the word was used in its Gr. or L. form (-geon, -gæon, -geum, -gæum).]
1. That point in the orbit of a planet at which it is nearest to the earth. In the Ptolemaic astronomy, applicable to any planet; now usually restricted to the moon and artificial satellites; rarely used of the position of the sun when the earth is in perihelion. Opposed to apogee 1.
(α) In form perigeon, -gæon, -geum, -gæum; pl. -a, † -ons, † -ums; phrase in perigeo.
1594Blundevil Exerc. vii. xliv. 344 b, His [the sun's] swift motion is when he is in the opposite point to the Auge, called Perigeon. 1603Sir C. Heydon Jud. Astrol. xi. 248 Those points which we call Apogæa, or Perigæa. 1621Burton Anat. Mel. ii. ii. iv. (1651) 284 The motion of the planets, their magnitudes, apogeums, perigeums, excentricities. 1682Phil. Trans. XIII. 82 The Satellite was then in Perigæo. 1704J. Harris Lex. Techn. I, Perigæon, or Perigæum, is a Point in the Heavens, wherein a Planet is said to be in its nearest Distance possibly from the Earth. 1715Cheyne Philos. Princ. Nat. Relig. i. 213 If the Moon is then in her Perigeum. 1794Sullivan View Nat. I. 393 When both luminaries are in the equator, and the moon in perigeo. 1799W. Tooke View Russian Emp. I. 56 Four [days] before the full moon, two after its transit through the perigaeum. 1844Lingard Anglo-Sax. Ch. (1845) II. xi. 173 From Pliny..[they] inferred, that in the perigeum their velocity must be apparently increased.
(β) In form † perigé, † perige, perigee.
1594J. Davis Seaman's Secr. i. Wks. (Hakl. Soc.) 245 Her [the moon's] swift motion is in the opposite of auge or perigee. 1598Sylvester Du Bartas ii. ii. iv. Columnes 605 What Epicicle meaneth, and Con-centrik, With Apogé, Perigé, and Eccentrik. 1638Wilkins New World i. (1684) 53 If there were any Light proper to the Moon, then would that Plannet appear Brightest when she is Eclipsed in her Perige, being nearest to the Earth. 1642H. More Song of Soul ii. i. ii. vi, As Cynthia in her stouping Perigee, That deeper wades in the earths duskish Cone. 1705C. Purshall Mech. Macrocosm 119 The Moon is not..always..in Perigee, when in Opposition to the Sun. 1834Nat. Philos., Astron. i. 35/1 (U. Kn. Soc.) The sun is in perigee about the 30th of December. 1834M. Somerville Connex. Phys. Sc. xiii. (1835) 115 The spring tides are much increased when the moon is in perigee, because she is then nearest to the earth. 1962J. Glenn in Into Orbit 142 We planned for an apogee, or high point, of about 145 miles and a perigee or low point, of about 85 miles. 1966Electronics 3 Oct. 179 It will orbit out to an apogee of 138,000 miles for the interplanetary readings and then dip back to a perigee of 120 miles.
†2. The point of the heaven at which the sun has the least altitude at noon; i.e. at the winter solstice. Opp. to apogee 2. Obs.
1640G. Watts tr. Bacon's Adv. Learn. 146 The Apogée or middle point; and Perigée or lowest point of heaven. 1646Sir T. Browne Pseud. Ep. vi. v. 293 In the Apogeum or highest point (which happeneth in Cancer) it is not so hot under that Tropick on this side the Equator as unto the other side in the Perigeum or lowest part of the Eccentric.
3. fig. (Cf. apogee 3.)
1651Biggs New Disp. 155 Diseases in Perigæo or declination. 1662Glanvill Lux Orient. xiv. 119 They have had their Perigæ's as well as their Apogæ's;..their Verges towards the body and its joys as well as their aspires to nobler..objects. 1670Eachard Cont. Clergy 54 Sometimes he withdraws himself into the apogæum of doubt, sorrow, and despair; but then he comes again into the perigæum of joy, content, and assurance.
So periˈgeal, periˈgean adjs. [f. L. perigē-um + -al1, -an], of or pertaining to perigee.
1743Phil. Trans. XLVIII. 166 A new method for measuring the difference between the apogeal and perigeal diameters of the sun. 1812Woodhouse Astron. xxxiii. 313 The apogean and perigean lunar distances. 1867–77G. F. Chambers Astron. ii. i. 172 The Moon being..in a perigean position. |