| AGN | Active Galactic Nucleus | In English | |
| CIRCE | Confusion-limited Infrared Cosmology Explorer | In English | → Spaceflight engineering, astronautics |
| SF | Star Field | In English | |
| SMC | Standard Model of Cosmology | In English | |
| StHCG | Studies in High Energy Physics Cosmology and Gravitation | In English | → Serial publications, periodicals → Nuclear, atomic, and molecular physics |
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