月軌道探査機:追跡データは,月の重力場の性質を示しています

W H Michael, R H Tolson, J P Gapcynski

Science (New York, N.Y.)

|September 2, 1966

まとめ

最初の米国の月衛星は,月の重力場に関する新しい洞察を提供している. 初期のデータは,梨状の月の成分を示唆し,その重力特性に科学的関心があります.

科学分野:

月科学は月科学である.
重力物理学重力物理学とは重力物理学です.

背景:

月の重力場を理解することは,月探査と軌道動態にとって極めて重要です.
過去の月の重力のモデルは,その複雑さを完全に捉えることができなかったかもしれない.

研究の目的:

アメリカ初の月衛星からの初期データを分析する.
月の重力場に関する新しい情報を得るために.

主な方法:

アメリカの月衛星の軌道追跡.
宇宙船の軌道と重力相互作用に関するテレメトリデータの分析.

主要な成果:

衛星は,軌道から数日以内に,月の重力に関する重要な新しいデータをすでに提供しています.
予備的な発見は,月面に相当な梨状の成分があることを示しています.
探査機は,月面への衝突の可能性が予想される約8ヶ月前に,撮影ミッションを完了する予定です.

結論:

月の重力場は,重要な科学的関心を持つユニークな特性を有しています.
観測された梨状の成分については,さらなる調査が必要である.
衛星のミッションは,最終的な月面衝突前に成功裏に完了することが期待されています.

さらに関連する動画

06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

関連する概念動画

01:20

Rocket Propulsion in Gravitational Field - I

Rockets range in size from small fireworks that ordinary people use to the enormous Saturn V that once propelled massive payloads toward the Moon. The propulsion of all rockets, jet engines, deflating balloons, and even squids and octopuses are explained by the same physical principle: Newton's third law of motion. The matter is forcefully ejected from a system, producing an equal and opposite reaction on what remains.
The motion of a rocket in space changes its velocity (and hence its...

01:27

Gravity between Spherical Bodies

Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...

01:24

Acceleration due to Gravity on Other Planets

The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...

01:06

Tidal Forces

The origin of Earth's ocean tides has been a subject of continuous investigation for over 2000 years. However, the work of Newton is considered to be the beginning of the proper understanding of the phenomenon. Ocean tides are the result of gravitational tidal forces. These same tidal forces are present in any astronomical body; they are responsible for the internal heat that creates the volcanic activity on Io, one of Jupiter's moons, and the breakup of stars that get too close to black holes.

01:09

Radiation Pressure: Problem Solving

The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...

01:16

Gravitation

In the years before Newton, a general belief prevailed that different laws governed objects in the sky than objects on Earth. When Kepler wrote down the three laws of planetary motion, explaining in detail the geometrical properties of the planetary orbits around the Sun, there was no immediate idea to discern their connection with more fundamental laws. It was Isaac Newton who, in 1665–66, figured out the connection between planetary motion, the motion of the moon around the Earth, and the...

関連する実験動画