Follow this link to skip to the main content
NASA Ames Research Center

abs  absolute
ACRIM Active Cavity Radiometer for Irradiance Monitoring
ARC Ames Research Center
AU astronomical unit = 1.5 x 108 km
AXAF Advanced X-ray Astrophysics Facility
CaII singlely ionized calcium
CCD charge-coupled device
COROT COnvection and ROTation of stars
Co-I Co-Investigator
Dec declination
deg degrees
DLT Digital Linear Tape
DSN Deep Space Network
EEV English Electronic Valve
EOM end of mission
EPS encapsulated postscript format
ESA European Space Agency
FAME Full-sky Astrometric Mapping Explorer
FAQ Frequently Asked Questions
FITS Flexible Information Transport System
FOV Field Of View
frac fractional
GIF Graphics Interchange Format
HET Hobby-Eberly Telescope
HI neutral hydrogen
HII ionized hydrogen
HST Hubble Space Telescope
HZ Habitable Zone
IR InfraRed
JPL Jet Propulsion Laboratory
LED Light Emitting Diode
LHS Lawrence Hall of Science
LOS Line Of Sight
MB MegaBytes
Me An Earth mass
MJ A Jupiter mass= 318 Me
MMTO Smithsonian/U Arizona MMT Observatory
MOST Micro-variability and Oscillations of STars
Mo One solar mass
mv Visual Magnitude
Myrs Millions of years
NAS National Academy of Sciences
NASA National Aeronautics and Space Administration
NEAR Near Earth Astroid Rendezvous
NGST Next Generation Space Telescope
nm nanometers = 10-9 meters
NRC National Research Council
OCLI Optical Coating Labs Inc
OSS Office of Space Science
pc parsec = 3.1 x 1016 meters
PDF Portable Document Format
PI Principal Investigator
pix pixel
ppm parts per million
PSF Point Spread Function
PZT PieZoelectric Transducer
QTH Quartz-Tungsten-Halogen lamp
RA Right Ascension
Re one Earth Radius
RJ one Jupiter Radius = 11.2 Re
rel relative
RSS Root Sum Square
RTD Resistance Temperature Detector
SAO Smithsonian Astrophysical Observatory
SETI Search for Extra-Terrestrial Intelligence
SIM Space Interferometry Mission
SIRTF Space InfraRed Telescope Facility
SMM Solar Maximum Mission
SNR Signal-to-Noise Ratio
SOFIA Stratospheric Observatory For Infrared Astronomy
SSED Solar System Exploration Division
SOHO SOlar and Heliospheric Observatory
STScI Space Telescope Science Institute
SWG Science Working Group
TBD To Be Determined
TEU ThermoElectric Unit
TLA Three Letter Acronym
TPF Terrestrial Planet Finder
USNO United States Naval Observatory
UV ultraviolet
VIRGO Variability of solar IRradiance and Gravity Oscillations on SOHO
yr year