| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | space shuttle acronym | space enthusiasts in the United States | The acronym 'STS' for Space Transportation System is widely used by NASA engineers and space enthusiasts in the United States. | 3 |
| 2 | celestial events | Space enthusiasts in the United States | Space enthusiasts in the United States actively participate in celestial events such as solar eclipse viewings and meteor showers. | 1 |