| Publisher Series | Biblioteca de Divulgación Científica |
| Imprint | Muy Interesante |
| Publisher | Ediciones Orbis, S.A. |
| Translated by | Jaime Piñeriro |
| Series Director | Virgilio Ortega |
| Copyright Holder | Carl Sagan, Jerome Agel, Plaza & Janés Editores, S.A., Ediciones Orbis, S.A. |
| Printed and Bound by | Printer Industria Gráfica, S.A. |
| Format | Hardback |
| Language | Spanish |
| Location | Spain |
| Copyright | 1973 |
| Copyright | 1978 |
| This Edition Published | 1985 |
| Pages / Font | 251 pages |
| Series Number | 1 |
| ISBN 10 | 84-7634-115-6 |
| DL (Spanish) | B. 16801-1985 |
| Notes | Printed in Spain |