Browse Definitions:
Definition

moon's mean radius

The Moon's mean radius is, as it is for planetary objects like the Earth, determined as the average distance from the physical center to the surface. The value, symbolized r moon , is equal to approximately 1,738,000 meter s (1.738 x 10 6 m). This is roughly 1,738 kilometer s (km) or 1,080 statute mile s.

The Moon is not a perfect sphere; its shape is slightly distorted because of tidal effects caused by the gravitation of the Earth. In addition, there are irregularities in the surface because of craters and mountains. The actual lunar radius varies slightly depending on the direction in which it is measured. The mean radius is obtained from a large number of individual measurements in various directions.

Based on the value of r moon given here, the volume of the Moon ( V moon ), in meters cubed (m 3 ), can be found using the standard formula for the volume V of a sphere in terms of its radius r :

V = (4/3)(pi) r 3

where pi represents the ratio of the circumference of a circle to its diameter, an irrational number equal to approximately 3.14159. Based on this formula:

V moon = 2.199 x 10 19 m 3

Also see Table of Physical Units and Constants.

This was last updated in February 2008

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

  • audit program (audit plan)

    An audit program, also called an audit plan, is an action plan that documents what procedures an auditor will follow to validate ...

SearchSecurity

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

  • nearline storage

    Nearline storage is the on-site storage of data on removable media.

  • application-aware storage

    Application-aware storage is a storage system with built-in intelligence about relevant applications and their utilization ...

  • Remote Direct Memory Access (RDMA)

    Remote Direct Memory Access (RDMA) is a technology that allows computers in a network to exchange data in main memory without ...

SearchSolidStateStorage

  • 3D XPoint

    3D XPoint is memory storage technology jointly developed by Intel and Micron Technology Inc.

  • RRAM or ReRAM (resistive RAM)

    RRAM or ReRAM (resistive random access memory) is a form of nonvolatile storage that operates by changing the resistance of a ...

  • JEDEC

    JEDEC is a global industry group that develops open standards for microelectronics.

SearchCloudStorage

  • Google Cloud Storage

    Google Cloud Storage is an enterprise public cloud storage platform that can house large unstructured data sets.

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

Close