M meaning in Space Science ?

Answer: What is Mass mean?

Mass is both a property of a physical body and a measure of its resistance to acceleration (rate of change of velocity with respect to time) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.

The SI base unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses. An object on the Moon would weigh less than it does on Earth because of the lower gravity, but it would still have the same mass. This is because weight is a force, while mass is the property that (along with gravity) determines the strength of this force.

reference

Full Form	Category
Meaning	Academic & Science
Millennium	Academic & Science
Mass (as in E=mc^2)	Academic & Science
1000 (Roman numeral)	Academic & Science
Methionine	Academic & Science
Mean anomaly	Academic & Science
Misguided	Academic & Science
Making	Accounts and Finance
Thousand (roman Numeral)	Accounts and Finance
Managing	Business
Macy’s, Inc.	Business
Manufacturer	Business
Methyl	Chemistry
Molar	Chemistry
Molecular	Chemistry
Mifune	Community
Mystery	Community
Mediocrity	Community
Mature	Community
Metaphysical	Community
Media	Community
Meditation	Community
Matthew	Community
Motivation	Community
Multiply	Computer Assembly Language
Memory	Computer Hardware
Monitor	Computer Hardware
Mature (Age 17+)	Computing
Meta	Computing
Music	Educational Degree
Milli-	Electronics
Negative Connection	Electronics
Mega	Electronics
Maple Common Binary File	File Type
Matlab M-file Function and Commands	File Type
Miranda Programming Language Script File	File Type
Mathematica Standard Package	File Type
Macadamia	General
Molto (Italian coin grade equivalent to Good)	General
Michael	General
Matt	General
Milk	General
Martin	General
Chief of the British Secret Service	General
Manure	General
The Maintenance	General
The Multiplicative	General
Magenta	General
Maritime	Governmental
Mediocre	Governmental
Moronic	Governmental
Murder	Governmental
Maniacal	Governmental
Maybe	Governmental
Misunderstood	Governmental
Mud, Muddy	Governmental
Misdemeanor	Governmental
Murderer	Governmental
Meridie	International
Mercurius	International
one thousand	International
Miladi	International
Metri	International
Middle Name	Internet
Maiden	Jobs
Man	Jobs
Manservant	Jobs
Markovian	Maths
Maximum	Maths
Manifold	Maths
Method	Maths
1,000	Measurement Unit
Metre (spelled "meter" In Usa)	Measurement Unit
Metre	Measurement Unit
Mille	Measurement Unit
Misery	Medical
Monocytes	Medical
Married	Medical
Manic	Medical
Medicine	Medical
Mighty	Messaging
Miserable	Messaging
Marvelous	Messaging
Missionary	Messaging
Maxim	Military and Defence
Model	Military and Defence
Multiple	Physics Related
Magic	Physics Related
Michigan	Regional
Module	Softwares
Mobile	Softwares
Mach	Space Science
Maintainability	Space Science
Major Cycle	Space Science
Male	Space Science
Mandatory	Space Science
Mass	Space Science
Meter	Space Science
Middle	Space Science
Missing (data)	Space Science
Monitor (mon Preferred)	Space Science
Number of Revolutions Required for The Rendezvous	Space Science
Mars	Space Science
Multiplayer	Sports
Motorsport	Sports
Mutual	Stock Exchange
Up to 81 mph	Technology