| Term | Definition / Meaning / Stand for |
|---|---|
| SI | International System of Units (Systeme International) |
| SWS | Short Wavelength Spectrometer |
| SBR | Signal-to-Background Ratio |
| SMEX | Small Explorer Program |
| SMC | Small Magellanic Cloud |
| SAD | Solar Active Disturbance |
| SE | Solar Eclipses |
| SEP | Solar Energetic Particles |
| SH | Solar Halo |
| SHP | Solar Heliospheric Physics |
| SIS | Solar Imaging Spectroscopy |
| SIV | Solar Ionized Vapors |
| SIB | Solar Irradiance Budget |
| SONET | Solar Network |
| SO | Solar Observatory |
| SPD | Solar Particle Detector |
| SPE | Solar Particle Event |
| SP | Solar Physics |
| SRS | Solar Radiation Storm |
| SSB | Solar System Body |
| SSDO | Solar System Dynamics Observatory |
| SSO | Solar System Observatory |
| SSP | Solar System Physics |
| SUVI | Solar Ultraviolet Imager |
| SW | Solar Wind |
| STU | Solar-Terrestrial Unit |
| SPAC | Space Astronomy Center |
| SIT | Space Imaging Telescope |
| SIRTF | Space Infrared Telescope Facility |
| SPICA | Space Infrared Telescope for Cosmology and Astrophysics |
| SSF | Space Science Facility |
| SSA | Space Situational Awareness |
| SC | Spacecraft |
| SPI | Spectrometer on Integral |
| SST | Spitzer Space Telescope |
| SF | Star Formation |
| SBBC | Star-Blackhole Binary Companion |
| SAC | Stellar Aberration Coefficient |
| SAF | Stellar Astrophysics Facility |
| SAP | Stellar Astrophysics Program |
| SBH | Stellar Black Hole |
| SCF | Stellar Convective Flow |
| SCOR | Stellar Core Rotation |
| SDA | Stellar Density Analysis |
| SFS | Stellar Feedback Simulation |
| SPC | Stellar Population Classification |
| SRC | Stellar Remnant Classification |
| SSP | Stellar Spectral Profile |
| SSE | Stellar Structure and Evolution |
| STR | Stellar Temperature Ratio |
| ST | Stellar Thermodynamics |
| STB | Stellar Time-Based Analysis |
| SU | Stellar Unit |
| SV | Stellar Variability |
| SYR | Stellar Yield Ratio |
| STO | Stratospheric Terahertz Observatory |
| SBMO | Submillimeter Background Mapping Observatory |
| SOL | Sun (often used in planetary science) |
| SZ | Sunyaev-Zel'dovich Effect |
| SZG | Sunyaev-Zel'dovich Galaxy |
| SZZF | Sunyaev-Zel'dovich Zone Formation |
| SZZ | Sunyaev-Zel'dovich Zone |
| SSS | Super Soft X-ray Source |
| SL | Superluminal Motion |
| SLSN | Superluminous Supernova |
| SBA | Supermassive Blackhole Accretion |
| SSC | Supermassive Star Cluster |
| SD | Supernova Detonation |
| SQM | Supernova Quark Matter |
| SN | Supernova |
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| Similar Abbrivations (Full forms) | |
|---|---|
| BHSEC | NBFP |
| ATL | ME |
| t-hCG | SVCEF |
| HCRSL | KABP |
| GNYOS | OLPGAA |
| NAAMPS | FOMSC |