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Earth and the Moon orbit about their barycentre (common centre of mass), which lies about 4,670 km (2,900 mi) from Earth's centre (about 73% of its radius), forming a satellite system called the Earth–Moon system.
- Lunar orbit
In astronomy and spaceflight, a lunar orbit (also known as a...
- Moon
The Moon's orbit is slightly elliptical, with an orbital...
- Lunar orbit
La Luna completa la sua orbita intorno alla Terra in circa 27,32 giorni (mese siderale). La Terra e la Luna orbitano attorno al loro baricentro (centro di massa comune) che si trova a circa 4.600 km dal centro della Terra (circa tre quarti del raggio terrestre).
In astronomy and spaceflight, a lunar orbit (also known as a selenocentric orbit) is an orbit by an object around Earth's Moon. In general these orbits are not circular. When farthest from the Moon (at apoapsis ) a spacecraft is said to be at apolune , apocynthion , or aposelene .
The Moon's orbit is slightly elliptical, with an orbital eccentricity of 0.055. [1] The semi-major axis of the geocentric lunar orbit, called the lunar distance, is approximately 400,000 km (250,000 miles or 1.28 light-seconds), comparable to going around Earth 9.5 times. [177]
The lunar phase depends on the Moon's position in orbit around the Earth and the Earth's position in orbit around the Sun. This animation ( not to scale ) looks down on Earth from the north pole of the ecliptic.
The Moon makes a complete orbit around Earth in 27 Earth days and rotates or spins at that same rate, or in that same amount of time. Because Earth is moving as well – rotating on its axis as it orbits the Sun – from our perspective, the Moon appears to orbit us every 29 days.
2 dic 2022 · The animation shows both the orbit and the rotation of the Moon. The yellow circle with the arrow and radial line have been added to make the rotation more apparent. The arrow indicates the direction of rotation. The radial line points to the center of the visible disk of the Moon at 0°N 0°E.
