Glossary
- MACHOs (search)
Massive Compact Halo Objects
- MEPAG (search)
Mars Exploration Planning & Analysis Group
- MIDEX (search)
Medium Explorer
- ML3N (search)
Mars Long-lived Lander Network
- MMS (search)
Magnetospheric Multiscale
- MODIS (search)
Moderate Resolution Imaging Spectrometer
- MU-SPIN (search)
Minority University-Space Interdisciplinary Network
- Maunder minimum (search)
- A 70-year period from 1645 to 1715 when sunspots were rare.
- Milky Way (search)
- The galaxy of which the sun and the solar system are a part and which contains the myriads of stars that create the light of the Milky Way.
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Variants
- milky way (search)
- magnetic storms (search)
- A large-scale disturbance of the magnetosphere, often initiated by the arrival of an interplanetary shock originating at the Sun.
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Variants
- Magnetic storms (search)
- magnetopause (search)
- The boundary surface between the solar wind and the magnetosphere where the pressure of the magnetic field equals the pressure of the solar wind
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Variants
- Magnetopause (search)
- magnetosphere (search)
- The region surrounding a celestial body where its magnetic field controls the motions of charged particles.
- Variants
- magnetotail (search)
- The portion of a planetary magnetosphere which is pushed in the direction of the solar wind
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Variants
- Magnetotail (search)
- mesoscale (search)
- Of or relating to a meteorological phenomenon approximately 10 to 1000 kilometers in horizontal extent.
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Variants
- Mesoscale (search)
- meteor (search)
- Any of the small particles of matter in the solar system that are directly observable only by their incandescence from frictional heating on entry into the atmosphere.
- Variants
- meteorites (search)
- A meteor that reaches the surface of the earth without being completely vaporized.
- Variants
- meteorology (search)
- Study of the atmosphere and its phenomena.
- Variants
- microphysical (search)
- The physics of molecules, atoms, and elementary particles.
- Variants
- mission (search)
NASA Science-funded activity with the purpose of meeting goals laid out by presidential directive, and detailed in Science Mission Directorate's strategic plan.
- Variants
- modeling (search)
- A mathematical representation of a process, system, or object developed to understand its behavior or to make predictions. The representation always involves certain simplifications and assumptions.
- Variants
- modulated (search)
- To vary the amplitude, frequency, or phase of (a carrier wave or a light wave) for the transmission of information (as by radio); to vary the velocity of electrons in an electron beam.
- Variants