| Subject | English | Spanish |
| nat.sc. | Artificial Earth Satellite Observation Programme | Programa de observación de la tierra mediante satélites artificiales |
| el. | artificial earth-satellite | satélite artificial de la Tierra |
| environ. | artificial satellite Any man-made object placed in a near-periodic orbit in which it moves mainly under the gravitational influence of one celestial body, such as the earth, sun, another planet, or a planet's moon | satélites artificiales |