OBLIQUITY OF THE ECLIPTIC

Domain	Definition
Aerospace	The angle between the plane of the ecliptic (the plane of the earth's orbit) and the plane of the celestial equator.The obliquity of the ecliptic is computed from the following formula: 23 degrees 27 minutes 08.26 seconds - 0.4684 (t - 1900) seconds, where t is the year for which the obliquity is desired.Symbol e. (references)
Source: compiled by the editor from various references; see credits.

Specialty Definition: Obliquity of the ecliptic

The Obliquity of the ecliptic is the angle between the axis of rotation of the Earth and the ecliptic plane in which the Earth rotates around the Sun. The "obliquity" refers to the fact that this is an oblique angle, i.e. not a right angle or multiple thereof. The actual angle at the present phase of the Earth's history is about 66.5 degrees. (Another way of looking at this is to say that the Earth's axis is 23.5 degrees away from a line perpendicular to the plane of the ecliptic.) This inclination of the Earth's axis with respect to its orbital plane changes over time, due to the gravitational influence of the Sun, Moon, and other planets.

Commercial Usage: OBLIQUITY OF THE ECLIPTIC

Domain	Title
Books	Raphael's Astronomical Ephemeris of the Planet's Places for 1992: A Complete Aspectarian: Mean Obliquity of the Ecliptic, 1992, 23 26' 25' (reference) (more book examples)
Source: compiled by the editor from various references; see credits.

Alternative Orthography: OBLIQUITY OF THE ECLIPTIC

Hexadecimal (or equivalents, 770AD-1900s) (references)

4F 42 4C 49 51 55 49 54 59 4F 46 54 48 45 45 43 4C 49 50 54 49 43

Leonardo da Vinci (1452-1519; backwards) (references)

Binary Code (1918-1938, probably earlier) (references)

01001111 01000010 01001100 01001001 01010001 01010101 01001001 01010100 01011001 00100000 01001111 01000110 00100000 01010100 01001000 01000101 00100000 01000101 01000011 01001100 01001001 01010000 01010100 01001001 01000011

HTML Code (1990) (references)

&#79 &#66 &#76 &#73 &#81 &#85 &#73 &#84 &#89 &#32 &#79 &#70 &#32 &#84 &#72 &#69 &#32 &#69 &#67 &#76 &#73 &#80 &#84 &#73 &#67

ISO 10646 (1991-1993) (references)

004F 0042 004C 0049 0051 0055 0049 0054 0059 004F 0046 0054 0048 0045 0045 0043 004C 0049 0050 0054 0049 0043

Encryption (beginner's substitution cypher): (references)

OBLIQUITY OF THE ECLIPTIC

Specialty Definition: OBLIQUITY OF THE ECLIPTIC

Aerospace

Specialty Definition: Obliquity of the ecliptic

Crosswords: OBLIQUITY OF THE ECLIPTIC

Commercial Usage: OBLIQUITY OF THE ECLIPTIC

Books

Alternative Orthography: OBLIQUITY OF THE ECLIPTIC

4F 42 4C 49 51 55 49 54 59 4F 46 54 48 45 45 43 4C 49 50 54 49 43

01001111 01000010 01001100 01001001 01010001 01010101 01001001 01010100 01011001 00100000 01001111 01000110 00100000 01010100 01001000 01000101 00100000 01000101 01000011 01001100 01001001 01010000 01010100 01001001 01000011

&#79 &#66 &#76 &#73 &#81 &#85 &#73 &#84 &#89 &#32 &#79 &#70 &#32 &#84 &#72 &#69 &#32 &#69 &#67 &#76 &#73 &#80 &#84 &#73 &#67

004F 0042 004C 0049 0051 0055 0049 0054 0059 004F 0046 0054 0048 0045 0045 0043 004C 0049 0050 0054 0049 0043

49364643515543545924940254423923937464350544337

INDEX