ecliptic

Definitions

  • The Ancient Constellations South of the Ecliptic
    The Ancient Constellations South of the Ecliptic
  • WordNet 3.6
    • n ecliptic the great circle representing the apparent annual path of the sun; the plane of the Earth's orbit around the sun; makes an angle of about 23 degrees with the equator "all of the planets rotate the sun in approximately the same ecliptic"
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Webster's Revised Unabridged Dictionary
  • Interesting fact: URanus' axis is at 97 degrees. which means that it orbits on its side. (Most of the planets spin on an axis nearly perpendicular to the plane of the ecliptic but Uranus' axis is almost parallel to the ecliptic.)
    • ecliptic (Geog) A great circle drawn on a terrestrial globe, making an angle of 23° 28' with the equator; -- used for illustrating and solving astronomical problems.
    • ecliptic (Astron) A great circle of the celestial sphere, making an angle with the equinoctial of about 23° 28'. It is the apparent path of the sun, or the real path of the earth as seen from the sun.
    • Ecliptic Pertaining to an eclipse or to eclipses.
    • Ecliptic Pertaining to the ecliptic; as, the ecliptic way.
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Century Dictionary and Cyclopedia
    • ecliptic Pertaining to an eclipse.
    • ecliptic Pertaining to the apparent path of the sun in the heavens: as, ecliptic constellations.
    • n ecliptic In astronomy, a great circle of the heavens in the plane of the earth's orbit, or that of the apparent annual motion of the sun among the stars. The fixed ecliptic is the position of the ecliptic at any given date. The mean ecliptic is the position of the fixed ecliptic relative to the equinoctial, as modified by precession. This is now approaching the equinoctial at the rate of 47′ ′ per century. The true or apparent ecliptic is the mean ecliptic as modified by the effects of nutation. The obliquity of the ecliptic is the inclination of the ecliptic to the equinoctial. Its mean value for a. d. 1900 is 23° 27′ 8′ ′ .
    • n ecliptic A great circle drawn upon a terrestrial globe, tangent to the tropics. It is sometimes said to “mark the sun's annual path across the surface of the earth”; but since its plane is represented as fixed upon the earth, the rotation of the latter will give it a gyratory motion incompatible with its representing any celestial appearance. It may, however, prove convenient when a terrestrial globe is used instead of a celestial one.
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Chambers's Twentieth Century Dictionary
    • n Ecliptic the name given to the great circle of the heavens round which the sun seems to travel, from west to east, in the course of a year: a great circle on the globe corresponding to the celestial ecliptic
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Etymology

Webster's Revised Unabridged Dictionary
Cf. F. écliptique, L. linea ecliptica, Gr. 'ekleiptiko`s, prop. adj., of an eclipse, because in this circle eclipses of the sun and moon take place. See Ecliptic (a.)
Chambers's Twentieth Century Dictionary
Through O. Fr. and L. from Gr. ekleipsisek, out, leipein, to leave.

Usage

In literature:

Oh that the circle of the ecliptic would coincide with that of the equator!
"Northern Travel" by Bayard Taylor
The obliquity of the ecliptic affected with nutation.
"The Sailor's Word-Book" by William Henry Smyth
The Ecliptic is the great circle representing the path in which the sun appears to move in the celestial sphere.
"Lectures in Navigation" by Ernest Gallaudet Draper
He fixed the inclination of its axis to the ecliptic at 82 deg.
"A Popular History of Astronomy During the Nineteenth Century" by Agnes M. (Agnes Mary) Clerke
This path is known as the ecliptic, because eclipses only happen when the moon is in it.
"Pioneers of Science" by Oliver Lodge
He felt the dust which he had noticed earlier high above the ecliptic.
"The Game of Rat and Dragon" by Cordwainer Smith
ECLIPTICA or the ecliptic, is an imaginary line in the heavens in which the sun was supposed to have performed its annual course.
"The Borghesi Astronomical Clock in the Museum of History and Technology" by Silvio A. Bedini
The axis of the ecliptic is a line perpendicular to this plane.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7" by Various
The equator of the earth makes an angle of 23-1/2deg with the ecliptic, which is the plane of the earth's orbit.
"Spinning Tops" by John Perry
This line is called the ecliptic.
"A Text-Book of Astronomy" by George C. Comstock
This motion of the ecliptic would form a period of about two millions of years.
"A Philosophical Dictionary, Volume 2 (of 10)" by François-Marie Arouet (AKA Voltaire)
The plane of the ecliptic is that by which the position of the planets and the latitude and longitude of the stars are reckoned.
"The New Gresham Encyclopedia" by Various
This great circle of the celestial sphere is the ecliptic.
"Astronomical Lore in Chaucer" by Florence M. Grimm
He notes, however, that about 7500 B. C. the obliquity of the ecliptic was probably nearly 1 deg.
"Climatic Changes" by Ellsworth Huntington
They divided the daily course of the sun, like the ecliptic, into 360 parts, and then attempted to measure these at the equinox.
"The History of Antiquity, Vol. I (of VI)" by Max Duncker
The third element in the composite is the outer ecliptic corona, for the most part made up of long streamers.
"Astronomy" by David Todd
It is usually elliptical in shape, with its longer axis lying nearly in the plane of the ecliptic.
"Astronomical Curiosities" by J. Ellard Gore
Don't imagine that the obliquity of the ecliptic was always 23 degrees.
"The Wanderings of a Spiritualist" by Arthur Conan Doyle
See, whose result for the position of the invariable plane is inclination to ecliptic 1 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6" by Various
ECLIPTICA or the ecliptic, is an imaginary line in the heavens in which the sun was supposed to have performed its annual course.
"Smithsonian Institution - United States National Museum - Bulletin 240" by Anonymous
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In news:

Angles and planes are introduced with real world examples starting with Kepler's law concerning the Earth's ecliptic.
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In science:

We assume a sky brightness of . mag arcsec(cid:0) , representative of the ecliptic pole.
Morphology of Galaxy Mergers at Intermediate Redshift
The deepest observations of the UV sky should be made far from the Earth’s geocorona, away from the Sun, and out of the ecliptic.
Ultraviolet Sky Surveys
On the other hand, the IMF will scarcely make the Sun’s shadow shift to the east-westward because of a symmetric distribution of the away and toward field to the ecliptic plane in the period near solar minimum.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
The dipole axis is parallel or anti-parallel to the rotation axis of the Sun, that is, perpendicular to the plane of the ecliptic.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
The field strength of the dipole field at the radial distance r from the Sun’s center is expressed as B = B0(R⊙ /r)3√1 + 3 sin2 Φ, where Φ is the angle measured from the plane of ecliptic.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
The solar wind spreads two-dimensionally in the plane of the ecliptic and the IMF has an Archimedean spiral configuration as the Sun rotates.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
These are axial symmetric on the plane of the ecliptic and make the Archimedian spirals.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
It is, however, known that the polarity of the field is opposite in the north and south across the neutral sheet, which is almost parallel to the plane of ecliptic near solar minimum.
A study of the shadowing of galactic cosmic rays by the sun in a quiet phase of solar activity with the Tibet air shower array
Each hour the spin-axis is manoeuvred along the ecliptic plane by ∼ 2.′ 5.
On the linear filters for point source extraction of the Planck mission
For modelling of the Planck antenna beam shape we will describe the simplest scan strategy with the spin axis right on the ecliptic plane without any additional (regular) modulation (e.g. it can be above or below the plane due to precession).
On the linear filters for point source extraction of the Planck mission
The orbit of the Moon is not far out of the ecliptic, and its rotational axis is similarly aligned.
Does the Lunar Surface Still Offer Value As a Site for Astronomical Observatories?
The network had an excellent con figuration, due to the large spacecraft separations between Earth, Mars and Ulysses, which is orbiting around the sun, out of the ecliptic plane.
Gamma-Ray Bursts Observed with the Spectrometer SPI Onboard INTEGRAL
The total intensity at the ecliptic poles from DIRBE and FIRAS data is shown in Figure 2.
The Infrared Sky
The intensity averaged over the DIRBE mission of the ecliptic poles.
The Infrared Sky
As the planets are in the ecliptic plane the relatively large angular separations between successive rings in the cross-scan direction has the effect that only a small proportion of the observations in a cross-scan transit are saturated.
The Geometric Calibration of the Planck satellite using Solar System Objects
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