Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

M

A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z



M series (Japanese rockets)
M star
M1 (NGC 1952, Crab Nebula)
M2 (NGC 7089, globular cluster)
M3 (NGC 5272, globular cluster)
M4 (NGC 6121, globular cluster)
M5 (NGC 5904, globular cluster)
M6 (NGC 6405, Butterfly Cluster)
M7 (NGC 6475, Ptolemy's Cluster)
M8 (NGC 6523, Lagoon Nebula)
M11 (NGC 6705, Wild Duck Cluster)
M13 (NGC 6205, Great Cluster in Hercules)
M16 (NGC 6611, open cluster)
M17 (NGC 6618, Omega Nebula)
M20 (NGC 6514, Trifid Nebula)
M27 (NGC 6853, Dumbbell Nebula)
M31 (NGC 224, Andromeda Galaxy)
M32 (NGC 221, companion to M31)
M33 (NGC 598, Triangulum Galaxy)
M36 (NGC 1960, open cluster)
M37 (NGC 2099, open cluster)
M38 (NGC 1912, open cluster)
M41 (NGC 2287, open cluster)
M42 (NGC 1976, Orion Nebula)
M44 (NGC 2632, Praesepe)
M45 (Pleiades)
M50 (NGC 2323)
M51 (NGC 5194, Whirlpool Galaxy)
M52 (NGC 7654, open cluster)
M57 (NGC 6720, Ring Nebula)
M63 (NGC 5055, Sunflower Galaxy)
M64 (NGC 4826, Black Eye Galaxy)
M72 (NGC 6981, globular cluster)
M74 (NGC 628, spiral galaxy)
M76 (NGC 650, Little Dumbbell Nebula)
M80 (NGC 6093, globular cluster)
M81 (NGC 3031, spiral galaxy)
M82 (NGC 3034, companion to M81)
M87 (NGC 4486, elliptical galaxy)
M89 (NGC 4552, elliptical galaxy)
M94 (NGC 4736, spiral galaxy)
M95 (NGC 3351, barred spiral)
M97 (NGC 3587, Owl Nebula)
M101 (NGC 5457, spiral galaxy)
M103 (NGC 581, open cluster)
M104 (NGC 4594, Sombrero Galaxy)
M110 (NGC 205, companion to M31)
M-2 (lifting body)
M2P2 (Mini-Magnetospheric Plasma Propulsion)
maar
MABES (Magnetic Bearing Satellite)
Mach, Ernst (1838–1916)
Mach angle
Mach number
machine
machine tools
Mach's principle
MACHO Project
MACHOs
Macintosh, Charles (1766–1843)
Mack, John E. (1929–2004)
Maclaurin, Colin (1698–1746)
Maclaurin trisectrix
Macleod, John James Richard (1876–1935)
MacMahon, Percy Alexander (1854–1929)
MacMahon squares
McMillan, Edwin Mattison (1907–1991)
macro
macroevolution
macromolecule
macroturbulence
MACSAT (Multiple Access Communications Satellite)
macula
Mädler, Johann Heinrich von (1794–1874)
Maestlin, Michael (1550–1631)
Maffei 1 Group
mafic
Magdeburg Project
Magellan (Venus probe)
Magellan Telescopes
Magellanic Clouds
Magellanic Stream
Magendie, François (1783–1855)
maghemite
magic cube
magic number
magic square
magic tour
maglev
magma
magnesite
magnesium
magnet
magnetar
magnetic bottle
magnetic cataclysmic variable
magnetic constant
magnetic declination
magnetic field
magnetic field lines
magnetic field reversal
magnetic field strength
magnetic flux
magnetic flux density
magnetic inclination
magnetic lens
magnetic levitation launch-assist
magnetic moment
magnetic monopole
magnetic quantum number
magnetic resonance imaging (MRI)
magnetic star
magnetic susceptibility
magnetism
magneto
magnetogram
magnetograph
magnetohydrodynamics
magnetometer
magnetopause
magnetoplasmadynamic thruster
magnetosheath
magnetosphere
Magnetosphere Probe
magnetostriction
magnetotactic bacteria
magnetotail
magnetotaxis
magnetron
magnification
magnifying glass
magnitude
magnitude, of the tenth brightest member
magnitude scale
Magnum
Magsat (Magnetic Field Satellite)
Maia (20 Tauri)
Maiman, Theodore Harold (1927–2007)
main asteroid belt
main diagonal
main memory
main sequence
mainframe
main-sequence fitting
main-sequence turnoff
main stage
major axis
major planet
majority rule circuit
Makarov, Oleg G. (1933–2003)
Maksutov telescope
malachite
malaria
male reproductive accessory glands
male reproductive duct system
male reproductive system
male sexual response and hormone control
Malebranche, Nicolas (1638–1715)
Malfatti circles
malic acid
Malin-1
Malina, Frank J. (1912–1981)
malleability
Malmquist effect
malnutrition
Malpighi, Marcello (1628–1694)
Malpighian layer
malt
Malthus, Thomas Robert (1766–1834)
maltose
Malus, Étienne Louis (1775–1812)
Malyutka
mammal
mammary glands
mancala
Mandelbrot, Benoît B. (1924–2010)
Mandelbrot set
mandible
mandibular nerve
mandrake
maneuverability
manganese
manganese nodules
manganese star
manganite
Manhattan Project
Manhigh, Project
MANIA
manifold
Maniitsoq impact crater
Manned Maneuvering Unit (MMU)
Manned Orbiting Laboratory (MOL)
MANNED SPACEFLIGHT
manometer
Mantell, Captain Thomas F. (1922–1948)
mantissa
mantle
many-body problem
many-worlds theory
map
MAP (Microwave Anisotropy Probe)
MAP (Multichannel Astrometric Photometer)
mapping
MAPS
marble
marcasite
Marconi, Guglielmo (1874–1937)
Marcus, Rudolph A. (1923–1937)
Marcy, Geoffrey W. (1954–)
MARECS
Marfa Lights
Marfan syndrome
Margulis, Lynn (1938–2011)
maria
Maria family (of asteroids)
marijuana
marine engine
Mariner series
Mariner 2
Mariner 9
Mariotte, Edmé (1620–1684)
maritime climate
Marius, Simon (1573–1624)
Markarian Chain
Markov chain
marl
Marquardt space sled
MARS
Mars
Mars, ammonia on
Mars, atmosphere
Mars, canals
Mars, caves
Mars, changes on
Mars, communication with
Mars, dust devils
Mars, life
Mars, meteorites from
Mars, methane on
Mars, moons
Mars, oppositions
Mars, past conditions
Mars, polar caps
MARS, UNMANNED SPACECRAFT
Mars, vegetation
Mars, water
Mars 1969 A/B
Mars 96
Mars Climate Orbiter
Mars Exploration Rovers
Mars Express
Mars "face"
Mars Global Surveyor (MGS)
Mars meteorites
Mars Microprobe Mission
Mars Observer
Mars Pathfinder
Mars Phoenix Lander
Mars Phoenix Lander photos
Mars Polar Lander
Mars Reconnaissance Orbiter
Mars Science Laboratory
Mars Scout
Mars Surveyor 98
Mars trojan
Mars 2001 Odyssey
Mars-crosser
Marsden, Ernest (1889–1970)
Marshall, George C. (1880–1959)
Marshall Space Flight Center
Marsnik
marsupial
Martian Chronicles, The
martian "fossils" controversy
Martin, Archer John Porter (1910–2002)
Martin, Pierre Émile (1824–1915)
Martingale system
Mascall, Eric Lionel (1905–1993)
Mascheroni construction
mascon
maser
Maskelyne, Nevil (1732–1811)
mass
mass deficiency
mass discrepancy
mass driver
mass extinction
mass function
mass loss
mass number
mass production
mass ratio
mass spectrometry
mass transfer
mass-energy relationship
masseter
massif
mass-luminosity ratio
mass-luminosity relation
mass-luminosity-radius relation
mass-radius relation
mast cell
mastectomy
mastic
MASTIF (Multiple Axis Space Test Inertia Facility)
mastoid bone
Matador
Matagorda Island
match
materialism
mathematical lifespan
mathematical models
MATHEMATICAL TERMINOLOGY
MATHEMATICIANS
MATHEMATICS
mathematics
mathematics, as a universal language
Mathilde (minor planet 253)
mating ritual
Matrioshka brain
matrix
matter
Matthew, William Diller (1871–1930)
Mattingly, Thomas K. II (1936–)
Mauchly, John William (1907–1980)
Maul, Alfred (1864–1941)
Mauna Kea observatories
Maunder, Edward Walter (1851–1928)
mauve
Max Q
maxilla
maxillary artery
maxillary nerve
maxillary sinus
Maxim family
maximum
Maxwell, James Clerk (1831–1879)
Maxwell's equations
Mayall Telescope
Mayer, Julius Robert von (1814–1878)
Mayer, Maria Goeppert (1906–1972)
Mayo family
Mayor, Michel (1959–)
maze
McAdam, John Loudon (1756–1836)
McAuliffe, S. Christa Corrigan (1948–1986)
McCandless, Bruce II (1937–)
McDermot, Murtagh
McDivitt, James A. (1929–)
McDonald, James
McDonald Observatory
McDonnell Douglas
McIntosh (sunspot) scheme
McKay, Christopher P.
McKay, David S.
M-class asteroid
McMath-Pierce Solar Telescope
MCSA
MDS (Mission Demonstration test Satellite)
Me star
Mead, George Herbert (1863–1931)
mean
mean corpuscular hemoglobin (MCH)
mean corpuscular hemoglobin concentration (MCHC)
mean corpuscular volume (MCV)
mean free path
mean motion
mean motion resonance
mean orbital elements
mean parallax
mean place
mean sun
meander
measles
measure
measure theory
measuring and weghing puzzles
Méchain, Pierre François André (1744–1804)
mechanical advantage
mechanical equivalent of heat
mechanical puzzle
mechanics
mechanization and automation
MECO (main engine cutoff)
Medawar, Peter Brian (1915–1987)
medial
medial triangle
median
median nerve
median sagittal plane
mediastinum
medical diagnostic techniques
MEDICAL TESTS
medicine through the ages
medieval philosophy, related to the possibility of extraterrestrial life
mediocrity, principle
Mediterranean climate
medium Earth orbit (MEO)
medulla
medulla oblongata
medusa
meerschaum
megacatastrophe
megahertz (MHz)
megamaser
megaphone
meiosis
Meissa (Lambda Orionis)
Meissner effect
Meitner, Lise (1878–1968)
Mekbuda (Zeta Geminorum)
melamine
melanin
melanocyte-stimlating hormone (MSH)
melanoma
melanoma treatment
melatonin
melting point
memory
memory (computer)
Menaechmus (c.380–c.320 BC)
Mendel, Johann Gregor (1822–1884)
mendelevium
Mendeleyev, Dmitri Ivanovich (1834–1907)
Mendelian inheritance
Menger sponge
Ménière's disease
meninges
meningitis
meniscus
meniscus lens
Menkalinan (Beta Aurigae)
Menkent (Theta Centauri)
Menkib (Xi Persei)
Mensa (constellation)
menstrual cycle
menstruation
mensuration
mental illness
mental retardation
menthol
Mentor
Menzel, Donald Howard (1901–1976)
Merak (Beta Ursae Majoris)
Mercator, Gerardus (1512–1594)
mercerizing
mercury (element)
Mercury (planet)
Mercury, life
Mercury, rotation
Mercury Project
Mercury Seven
Mercury Thirteen
Mercury-Atlas
Mercury-ELINT
mercury-manganese star
Mercury-Redstone
meridian
Meridiani Planum
meristem
Merope (23 Tauri)
Merope Nebula (NGC 1435)
Mersenne, Marin (1588–1648)
Mersenne number
Mersenne prime
mesa
mescaline
mesentery
mesoderm
mesoglea
meson
mesopause
mesophiles
mesophyll
mesosiderite
mesosphere
mesothelioma
mesothelium
Mesozoic era
MESSENGER (Mercury Surface, Space Environment, Geochemistry and Ranging)
messenger probe
messenger RNA
Messerschmitt, Wilhelm (1898–1978)
Messerschmitt Me 163
Messier, Charles Joseph (1730–1817)
Messier Catalogue
META, Project
META II, Project
metabolic panel
metabolic syndrome
metabolism
metabolite
metacarpal
metal
metal fatigue
metal foil
metallic bond
metallic crystal
metallic hydrogen
metallicity
metalloid
metallurgy
metal-poor star
metal-rich star
metamorphic
metamorphosis
metaphysics
metasomatism
metastasis
metatarsal
metazoan
Metchnikoff, Élie (1845–1916)
meteor
Meteor (Russian satellites)
meteor, sporadic
meteor shower
meteor storm
meteor train
meteorite
meteorite shower
METEORITES, FAMOUS
meteorites, from Mars
meteorites, organic matter in
meteoroid
meteoroid stream
meteoroid swarm
meteorology
meteorological satellite
METEORS AND METEORITES
Meteosat
meter
methanal
methane
methane rocket engine
methanogens
methanol
methionine
method of exhaustion
methotrexate
Metis
Metonic cycle
MetOp (Meteorological Operational) satellites
metric
metric prefixes
metric space
metric units
metrizable
Metrodorus of Chios (fourth century BC)
Mettrie, Julien Offray de la (1709–1751)
Meudon Observatory
Meyer, Julius Lothar (1830–1895)
Miaplacidus (Beta Carinae)
mica
Mice, The (NGC 4676 A and B)
micelle
Michell, John (1724–1793)
Michelson, Albert Abraham (1852–1931)
Michelson-Morley experiment
microarray technology
microbe
microbes, temperature ranges of
microbiology
MICROBIOLOGY
microbody
microcline
microcode
microevolution
microfilament
microgravity
MicroLab
microlensing
Microlensing Observations in Astrophysics (MOA)
Microlensing Planet Search (MPS) Project
Micromegas
micrometeorites
micrometeoroid protection
micrometer
micron
micronutrient
microorganism
microphone
microprocessor
micropyle
microquasar
MicroSat
microsatellite
microscope
microscope argument
Microscopium (constellation)
microspheres
microtome
microtubule
microturbulence
Microwave Observing Program (MOP)
microwave plasma thruster
microwave radiation
microwave window
microwave-induced fusion propulsion
MIDAS (Missile Defense Alarm System)
midbrain
midcourse
middle ear
middle lamella
MIDEX (Medium-scale Explorer)
midnight sun
mid-ocean ridge
midpoint
Mid-Infrared Large-well Imager (MIRLIN)
Midori (a.k.a. ADEOS)
Mie scattering
Mightysat
migmatite
migraine
migration
Milankovich cycles
mildew
mile
MILITARY AIRCRAFT
MILITARY INSTALLATIONS
MILITARY RECONAISSANCE AND SURVEILLANCE
milk
Milky Way
Milky Way Galaxy
Mill, John Stuart (1806–1873)
Miller, Stanley Lloyd (1930–2007)
Miller-Urey Experiment
millibar (mb)
Millikan, Robert Andrews (1868–1953)
million
millipede
Millis drives
millisecond pulsar
Mills cross
Milne, Edward Arthur (1896–1950)
Milne, John (1850–1913)
Milstar (Military Strategic and Tactical Relay satellite)
Mimas
mimicry
Mimosa (Beta Crucis)
mind
mind transfer
mind-meld
mineral
mineral oil
mineralization
mineralocorticoid
mineralogy
minimal prime
minimal surface
minimum
mining
MiniSat
Minitrack
Minkowski, Hermann (1864–1909)
Minkowski, Rudolph Leo Bernhard (1895–1976)
Minkowski space
Minkowski's Object (Arp 133)
minor axis
minor planet
Minor Planet Center (MPC)
Minot, George Richards (1885–1950)
Minotaur (rocket)
Mintaka
Miocene epoch
Mir
Mira
Mira variable
Mirach (Beta Andromedae)
Mirach's Ghost (NGC 404)
mirage
Mirak (Minimum Rakete)
Miranda
Miranda (UK satellite)
Mirfak (Alpha Persei)
MIRLIN
mirror
mirror matter
mirror reversal problem
Mirzam (Beta Canis Majoris)
misch metal
Mishin, Vasily (1917–2001)
missile
missing dollar problem
missing mass
mission control center
Mission of Gravity
Mission of Opportunity (MO)
mission profile
mission specialist
Mississippi Test Facility
Mississippian
mist
mistral
Mitchell, Edgar Dean (1930–)
mite
mitochondria
mitochondrial DNA
mitosis
mitotic spindle
mitral regurgitation
mitral stenosis
mitral valve
mitral valve prolapse
Mitscherlich, Eilhardt (1794–1863)
Mittag-Leffler, (Magnus) Gösta (1846–1927)
mixed strategy
mixture
Mizar (Zeta Ursae Majoris)
MKS units
MMT
MOA
Möbius band
mode
model of computation
model theory
modem
moderator
modular arithmetic
modulation
module
modulo
modulus
Moffett Federal Airfield
Mogul, Project
Mohl, Hugo von (1805–1872)
Mohoroviic discontinuity
Mohr, Karl Friedrich (1807–1879)
Mohs scale
Moiré pattern
Moissan, Ferdinand Frédéric Henri (1852–1907)
molar mass
molasses
mold
mole (skin marking)
mole (unit)
molecular biology
molecular cloud
molecular formula
molecular genetics
molecular quantum computing cloud
molecular weight
molecule
molecules, in space
mollusc
Molniya
Molniya launch vehicle
Molniya-type orbit
molting
molybdenite
molybdenum
moment
moment of inertia
momentum
monad
monadnock
monazite
Mond, Ludwig (1839–1909)
monel metal
Monge, Gaspard (1746–1818)
monism
monkey
monkeys and typewriters
monoamine oxidase
Monoceros (constellation)
monochromatic
monochromatic triangle
monocline
monoclonal antibody
monocotyledon
monocyte
Monod, Jacques (1910–1976)
monoecious plant
Monogem Ring
monolayer
monomer
monomial
mononucleosis
monopropellant
monorail
monosaccharides
monosomy
monotonic
Monotremata
monsoon
Monster group
Monstrous Moonshine conjecture
Monte Carlo method
Montgolfier brothers
month
Montlivault, Sales-Guyon de
montmorillonite
Montucla, Jean Etienne (1725–1799)
Monty Hall problem
MOON
Moon
Moon, communication with
Moon, future manned missions
Moon, life
MOON, MANNED MISSIONS
MOON, UNMANNED MISSIONS
Moon, voyages
Moon, water
Moon base
"Moon Hoax"
"Moon trees"
moonquake
moons, atmospheres of
moons, life on
moonstone
moor
Moore, Patrick Alfred (1923–2012)
Moore, Stanford (1913–1982)
MOP (Microwave Observing program
Mopra Telescope
moraine
mordant
Morelos
Moreton wave
Morgagni, Giovanni Battista 1682–1771)
Morgan, Thomas Hunt (1866–1945)
Morgan, William Wilson (1906–1994)
Morgan-Keenan classification
Morganucodon
MORL (Manned Orbiting Research Laboratory)
Morley, Edward Williams (1838–1923)
Morley's miracle
Mormonism
Morokweng crater
morphine
morphogenesis
Morrison, Philip (1915–2005)
Morrison-Cocconi Conjecture
Morrison's radioglyph scheme
Morse, Samuel Finley Breese (1791–1872)
Morse code
Morton, William Thomas Green (1819–1868)
morula
MOS (Marine Observation Satellite)
mosasaur
Moseley, Henry Gwyn Jeffreys (1887–1915)
mosquito
moss
Mössbauer, Rudolf Ludwig (1929–)
Mössbauer effect
MOST (Microvariability and Oscillations of Stars)
mother-of-pearl
motor
motor chamber
motor nerve
motor neuron
Mott, Nevill Francis (1905–1996)
Mottelson, Ben Roy (1926–)
Moulton, Forest Ray (1872–1952)
Mount Graham International Observatory (MGIO)
Mount Palomar Observatory
Mount Stromlo and Siding Spring Observatory
Mount Wilson magnetic classification (of sunspots)
Mount Wilson Observatory
mountain
mounting
MOUSE (Minimum Orbital Unmanned Satellite of the Earth)
mouse model
mouth
moving cluster
moving sofa problem
MPD thruster
MPS Project
MRI (magnetic resonance imaging)
mRNA
Mrs. Perkins' quilt
MS star
MSETI
MSX (Midcourse Space Experiment)
M-theory
MTI (Multispectral Thermal Imager)
Mu Arae
mucigel
mucopolysaccharide
mucous membrane
mucus
mud volcano
mudstone
mule
Muller, Hermann Joseph (1890–1967)
Müller, Johann (1436–1476)
Müller, Paul Hermann (1899–1965)
Müller-Lyer illusion
Mulliken, Robert Sanderson (1896–1986
multicellular
Multichannel Astrometric Photometer (MAP)
Multichannel Astrometric Photometer and Spectrometer (MAPS)
Multi-Channel Spectrum Analyzer (MCSA)
multigrade
multiple
multiple birth
Multiple Mirror Telescope (MMT)
multiple myeloma
multiple proportions, law of
multiple sclerosis
multiple star
multiplet
multiplexer
multiplexing
multiplication
multi-processing
multi-programming
multipropellant
Multi-Purpose Crew Vehicle
Multi-Purpose Logistics Modules
multiringed basin
multistage ignition
multistage rocket
multi-tasking
multiverse
mumps
Munin
muon
muonium
Murasaki 312
Muratori (14th century)
Murchison meteorite
Murdock, William ((1754–1839)
Muroc Army Air Field
Murphy, John Benjamin (1857–1916)
Murphy, William Parry (1892–1987)
Murray, Bruce C. (1932–)
Murray meteorite
Musca (constellation)
muscle
muscle operation and contraction by nerves
muscovite
muscular dystrophy
muscular system
MUSES series
MUSES-C
Musgrave, (Franklin) Story (1935–)
MUSIC
musk
muskeg
Musson
mutagen
mutant
MUSTARD (Multi-Unit Space Transport and Recovery Device)
Musudan
mutation
mutualism
MX-324
My Favorite Martian
myalgic encephalomyelitis (ME)
myasthenia gravis
mycelium
mycobacterial diseases
mycoplasma
mycorrhiza
Mydorge, Claude (1585–1647)
myelin
Mylar
mylonite
myocarditis
myoglobin
Myojo
myometrium
myopia (near-sightedness)
myosin
myriad
myriapod
MYTHS AND LEGENDS