Erkinboyeva Hulkar
The Moon is the only natural satellite of the Earth. The Moon is located at an average distance of 384,400 km from the Earth. The angle of inclination of its orbit to the ecliptic plane is 5° 8′ 43″. Mass is 7.35×1022 kg (1/81.3 Earth mass).
Average radius is 1738 km, free fall acceleration on the surface is 1.62 m/s2. Astronomical sign. The Moon’s orbit lies at an average angle of 5°8’43” to the ecliptic plane, varying from 4°58′ to 5°20′. The period during which the Moon moves from west to east around the Earth in relation to a star is called its sidereal (or sidereal) period. This period is equal to 27.32 average solar days.
The points of intersection of the Moon’s orbit with the ecliptic plane are called its ascending and descending nodes. The Moon’s nodes move across the ecliptic in the opposite direction to the Moon’s motion (ie, westward) and make one full revolution of the ecliptic in 18 years and 7 months (6793 days).
The time elapsed between the moon leaving a node and returning to this node is called a dragon month, and it is equal to 27.21222 days on average. The periodicity of solar and lunar eclipses is related to this moon.
The moon rotates around an axis that makes an average angle of 83°20′ with its orbit. The period of its rotation around its axis (27.32 days) is equal to the sidereal moon (period), so the Moon always “looks” at the Earth from one side.
It is no coincidence that these periods have remained the same. The Earth’s gravity affects (slows down) the Moon’s rotation around its axis, making it equal to the period of its rotation around the Earth for millions of years. While the Moon rotates flat on its axis, its speed varies at different points in its orbit around the Earth, as a result, the Moon seems to wobble slightly when viewed from the Earth it seems.
The inclination is 7°54′ in longitude and 6°50′ in latitude. Such a vibration is called libration. The Moon is spherical with a radius of 1737 km, which is 0.2724 equal to the equatorial radius of the Earth. The surface area of the Moon is 3.8-107 km², its volume is 0.0743 = `/49 the size of the Earth.
A weak stereoscopic effect based on libration is used to measure the radius of points on the lunar surface. The study of libration made it possible to determine the difference between the semi-major axes of the Moon’s ellipsoid. The polar axis of the Moon is 700 m less than the equatorial axis directed to the Earth, and 400 m less than the equatorial axis perpendicular to the direction to the Earth.
Thus, under the influence of the Earth’s gravity, a Moon-shaped bubble was formed towards the Earth. Based on the study of the trajectories of satellites launched from the Earth, the Moon’s mass was most accurately calculated: it is 81.3 times smaller than the Earth’s mass, that is, 7.35-1025 g. The average density is 3.34 g/cm³ (0.61 Earth average density).
The acceleration of gravity on the surface of the Moon is 6 times smaller than on the Earth, i.e. 162.3 cm/s2, and decreases to 10.187 cm/s2 for each kilometer above the surface of the Moon. The first cosmic velocity on the moon is 1680 m/s, the second cosmic velocity is 2375 m/s. Since the moon’s gravity is small, it cannot have a gas shell and free water around it.
The National Museum of China has displayed to the public a sample of lunar soil brought to Earth by the Chane-5 spacecraft in December 2020. Placed in a special crystal-like transparent container, the weight of the sample is 100 grams, its height is 38.4, and its width is 22.8 centimeters.
These dimensions are not chosen by chance: the first number represents the distance from the Earth to the Moon (384 thousand kilometers), and the second represents the day that includes the process of collecting and delivering the sample.
Author:
The Moon is the only natural satellite of the Earth. The Moon is located at an average distance of 384,400 km from the Earth. The angle of inclination of its orbit to the ecliptic plane is 5° 8′ 43″. Mass is 7.35×1022 kg (1/81.3 Earth mass).
Average radius is 1738 km, free fall acceleration on the surface is 1.62 m/s2. Astronomical sign. The Moon’s orbit lies at an average angle of 5°8’43” to the ecliptic plane, varying from 4°58′ to 5°20′. The period during which the Moon moves from west to east around the Earth in relation to a star is called its sidereal (or sidereal) period. This period is equal to 27.32 average solar days.
The points of intersection of the Moon’s orbit with the ecliptic plane are called its ascending and descending nodes. The Moon’s nodes move across the ecliptic in the opposite direction to the Moon’s motion (ie, westward) and make one full revolution of the ecliptic in 18 years and 7 months (6793 days).
The time elapsed between the moon leaving a node and returning to this node is called a dragon month, and it is equal to 27.21222 days on average. The periodicity of solar and lunar eclipses is related to this moon.
The moon rotates around an axis that makes an average angle of 83°20′ with its orbit. The period of its rotation around its axis (27.32 days) is equal to the sidereal moon (period), so the Moon always “looks” at the Earth from one side.
It is no coincidence that these periods have remained the same. The Earth’s gravity affects (slows down) the Moon’s rotation around its axis, making it equal to the period of its rotation around the Earth for millions of years. While the Moon rotates flat on its axis, its speed varies at different points in its orbit around the Earth, as a result, the Moon seems to wobble slightly when viewed from the Earth it seems.
The inclination is 7°54′ in longitude and 6°50′ in latitude. Such a vibration is called libration. The Moon is spherical with a radius of 1737 km, which is 0.2724 equal to the equatorial radius of the Earth. The surface area of the Moon is 3.8-107 km², its volume is 0.0743 = `/49 the size of the Earth.
A weak stereoscopic effect based on libration is used to measure the radius of points on the lunar surface. The study of libration made it possible to determine the difference between the semi-major axes of the Moon’s ellipsoid. The polar axis of the Moon is 700 m less than the equatorial axis directed to the Earth, and 400 m less than the equatorial axis perpendicular to the direction to the Earth.
Thus, under the influence of the Earth’s gravity, a Moon-shaped bubble was formed towards the Earth. Based on the study of the trajectories of satellites launched from the Earth, the Moon’s mass was most accurately calculated: it is 81.3 times smaller than the Earth’s mass, that is, 7.35-1025 g. The average density is 3.34 g/cm³ (0.61 Earth average density).
The acceleration of gravity on the surface of the Moon is 6 times smaller than on the Earth, i.e. 162.3 cm/s2, and decreases to 10.187 cm/s2 for each kilometer above the surface of the Moon. The first cosmic velocity on the moon is 1680 m/s, the second cosmic velocity is 2375 m/s. Since the moon’s gravity is small, it cannot have a gas shell and free water around it.
The National Museum of China has displayed to the public a sample of lunar soil brought to Earth by the Chane-5 spacecraft in December 2020. Placed in a special crystal-like transparent container, the weight of the sample is 100 grams, its height is 38.4, and its width is 22.8 centimeters.
These dimensions are not chosen by chance: the first number represents the distance from the Earth to the Moon (384 thousand kilometers), and the second represents the day that includes the process of collecting and delivering the sample.
Author: Erkinboyeva Hulkar
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