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| English | Russian |
| interplanetary and interstellar colonization | межпланетная и межзвёздная колонизация (Sergei Aprelikov) |
| interstellar travel | путешествия к другим планетам (In the first half, he discussed the idea of interstellar travel, and venturing forth into the cosmos using various advanced technologies. (coasttocoastam.com) ART Vancouver) |