 |
| Subject | English | Thesaurus |
| ecol., abbr. | International Solar System Program | ISSP |
| ecol., abbr. | Solar and Wind Energy Research Program | SWERP |
| abbr., astronaut. | Solar-Terrestrial Energy Programme | STEP (COSPAR) |
| abbr., astronaut. | Solar Terrestrial Science Programme | STSP (ESA/NASA) |
| NASA, abbr. | Solar Terrestrial Science Programme | STSP |