Abbreviation Definition
SGCSouthern Galaxy Catalogue
SGDSolar Geophysical Data
SGRASchool of Galactic Radio Astronomy
SGRB(s)short gamma ray burst(s)
SHSuper Hot
SHASidereal Hour Angle
SIMStar in Motion
SIMBADSet Of Identifications Measurements And Bibliography For Astronomical Data
SIPSpace Interested Person
SIRASolar Imaging Radio Array
SISSETI (Search for Extra-Terrestial Intelligence) Intercept System
SJSpace Junk
SKASquare Kilometre Array
SLOISatellite Lake Observatory Initiative
SLOWPOKESSloan Low-mass Wide Pairs of Kinematically Equivalent Stars
SLSNesuperluminous supernova events
SLSN-Ihydrogen-poor SLSNe
SLSN-IIhydrogen-rich SLSNe
SLSN-Rradioactively powered SLSNe
SMASSouthern Maryland Astronomical Society

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