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Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, in a counterclockwise direction as viewed...17 KB (1,874 words) - 21:16, 6 November 2024- objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a significant amount of...161 KB (18,470 words) - 07:25, 24 November 2024
is one of the foci of the elliptical orbit of each body. This is an important concept in the fields of astronomy and astrophysics. In a simple two-body...16 KB (1,521 words) - 04:16, 26 November 2024
The Moon orbits Earth in the prograde direction and completes one revolution relative to the Vernal Equinox and the stars in about 27.32 days (a tropical...37 KB (4,642 words) - 18:48, 20 November 2024
discoveries in astronomy and Earth science, while also enabling global communication and navigation systems. Satellites in High Earth orbits are primarily...7 KB (602 words) - 22:39, 24 September 2024
Axial tilt (redirect from Equatorial inclination to orbit)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...33 KB (3,103 words) - 21:08, 4 October 2024- another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary...17 KB (2,059 words) - 22:31, 24 October 2024
the existence of other moons of Earth—that is, of one or more natural satellites with relatively stable orbits of Earth, other than the Moon—have existed...37 KB (4,044 words) - 00:22, 25 November 2024
A medium Earth orbit (MEO) is an Earth-centered orbit with an altitude above a low Earth orbit (LEO) and below a high Earth orbit (HEO) – between 2,000...10 KB (1,037 words) - 23:27, 10 October 2024- In astronomy, a co-orbital configuration is a configuration of two or more astronomical objects (such as asteroids, moons, or planets) orbiting at the...15 KB (1,760 words) - 00:32, 19 October 2024
- Geocentric orbit: An orbit around the planet Earth, such as that of the Moon or of artificial satellites. Selenocentric orbit (named after Selene): An orbit around...31 KB (3,455 words) - 19:37, 27 October 2024
3753 Cruithne (redirect from Earths 2nd moon)asteroid in orbit around the Sun in 1:1 orbital resonance with Earth, making it a co-orbital object. It is an asteroid that, relative to Earth, orbits the Sun...16 KB (1,699 words) - 14:36, 7 November 2024
the reference plane for the Solar System is usually considered to be Earth's orbital plane, which defines the ecliptic, the circular path on the celestial...4 KB (388 words) - 18:03, 25 April 2024
Sun (redirect from Sun's orbit)research since antiquity. The Sun orbits the Galactic Center at a distance of 24,000 to 28,000 light-years. From Earth, it is 1 astronomical unit (1.496×108 km)...165 KB (18,129 words) - 08:44, 24 November 2024
A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less...19 KB (2,126 words) - 18:36, 21 November 2024
Geocentric model (redirect from Earth-centered astronomy)description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth. The geocentric model was...75 KB (8,799 words) - 00:26, 15 November 2024- Lunar phase (category Observational astronomy)gradually changes over a lunar month as the relative orbital positions of the Moon around Earth, and Earth around the Sun, shift. The visible side of the Moon...25 KB (2,778 words) - 05:46, 26 November 2024
Space telescope (redirect from Orbital observatory)example, X-ray astronomy is nearly impossible when done from Earth, and has reached its current importance in astronomy only due to orbiting X-ray telescopes...9 KB (867 words) - 02:49, 5 June 2024
Lagrange point (redirect from Lagrange orbit)the orbital plane of the two large bodies. There are five Lagrange points for the Sun–Earth system, and five different Lagrange points for the Earth–Moon...51 KB (5,703 words) - 01:24, 30 October 2024
of astronomy focuses on the contributions civilizations have made to further their understanding of the universe beyond earth's atmosphere. Astronomy is...84 KB (10,298 words) - 07:13, 8 November 2024
- Volume 20 Orbit 26622601911 Encyclopædia Britannica, Volume 20 — Orbit ORBIT (from Lat. orbita, a track, orbis, a wheel), in astronomy, the path of
- a nearly periodic orbit. The search for periodic orbits using the Saros has led to the discovery of a set of eight periodic orbits of period equal to
- small circular motions that planets orbiting the Earth followed on top of their circular orbit around the Earth. Astronomers from Greek times to the