In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, which is the line perpendicular...

equinox dates swapped. The angle of Earth's axial tilt is relatively stable over long periods of time. Its axial tilt does undergo nutation; a slight, irregular...

a given region. On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. In temperate and polar regions, the...

Milanković. In the 1920s, he hypothesized that variations in eccentricity, axial tilt, and precession combined to result in cyclical variations in the intra-annual...

equatorial crater of Kait is selected as its prime meridian. Ceres has an axial tilt of 4°, small enough for its polar regions to contain permanently shadowed...

retrograde orbit. A celestial object's axial tilt indicates whether the object's rotation is prograde or retrograde. Axial tilt is the angle between an object's...

the planet. Jupiter's axial tilt is very small, so its seasonal variation is minimal; Uranus, on the other hand, has an axial tilt so extreme it is virtually...

Earth's orbital position is marked at the summer solstice, when the Earth's axial tilt is pointing directly toward the Sun. One full orbit later, when the Sun...

(−224 °C; −371 °F) out of all the Solar System's planets. It has a marked axial tilt of 82.23° with a retrograde rotation period of 17 hours and 14 minutes...

towards Polaris (the "North Star") year-round. Together with the Earth's axial tilt, this is one of the primary reasons for the Earth's seasons, as illustrated...

ecliptic, the plane in which the Earth orbits around the Sun. Earth's axial tilt varies over a 41,000-year period from about 22.1 to 24.5 degrees, and...

Earth's axial tilt. By definition, the positions of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle all depend on the tilt of...

planet's axial tilt, i.e. its obliquity against the orbit around the star. On Earth, the Moon has played an important role in stabilizing the axial tilt of...

revolutionary heliocentric theory into a map of the world." Because of Earth's axial tilt (often known as the obliquity of the ecliptic), the inclination of the...

projection of the terrestrial equator into outer space. Due to Earth's axial tilt, the celestial equator is currently inclined by about 23.44° with respect...

Hemisphere at 23°26′10.1″ (or 23.43613°) S; these latitudes correspond to the axial tilt of the Earth. The Tropic of Cancer is the Northernmost latitude from which...

(−270 °F) at night to 420 °C (790 °F) during sunlight. Due to the very small axial tilt, the planet's poles are permanently shadowed. This strongly suggests that...

the Sun's right ascension, governed by the combined effects of Earth's axial tilt and its orbital eccentricity. One can photograph an analemma by keeping...

axial tilt to be captured in a resonance called a Cassini state. There are small oscillations around this state and in the case of Mars these axial tilt...

66°33′49.9″ north of the Equator. Its latitude depends on the Earth's axial tilt, which fluctuates within a margin of more than 2° over a 41,000-year period...

determined from basic geometry.[unreliable source?] The Earth's axis of rotation tilts about 23.5 degrees, relative to the plane of Earth's orbit around the Sun...

suggested that the Moon is necessary to keep the Earth's axial tilt stable. Without the Moon the axial tilt of Earth could therefore oscillate chaotically from...

axial tilt (that is, of the Earth's axis of daily rotation relative to the ecliptic, the plane of the Earth's orbit). This predominant, average tilt of...

(42.3 °F) similar to Earth's seasons, as both planets have significant axial tilt. Mars was formed approximately 4.5 billion years ago. During the Noachian...

slightly over cycles of varying lengths (see nutation, polar motion and axial tilt). Finally, over very long periods the positions of the stars themselves...

intended to determine the Earth's axial tilt ("obliquity of the ecliptic") to high precision. He determined the axial tilt to be 23°32'19" for the year 994...

any long period or cycle, such as the Great Year. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change...

with the mutual inclinations of planets in multi-planetary systems. The axial tilt of Kepler-413b's spin axis might vary by as much as 30 degrees over 11...

rotational pole of Lutetia: RA = 51.8°±0.4°, Dec = +10.8°±0.4°. This gives an axial tilt of 96° (retrograde rotator), meaning that the axis of rotation is approximately...

next 1.5–4.5 billion years, Earth's axial tilt may begin to undergo chaotic variations, with changes in the axial tilt of up to 90°. The luminosity of the...