Planetarium Inversum -- a space vision for Earth education.
Lotsch B.
Advances in space research : the official journal of the Committee on Space Research (COSPAR).Adv Space Res.2003;31(7):1705-10.
In a planetarium, the visitor is sitting on Earth and looking into an imaginary space. The Planetarium Inversum is the opposite: visitors are sitting in a space station, looking down on Mother Earth. It is a scientifically-based information show with visitors involvement, its elements being partiall
ir·re·place·a·ble (ĭr′ĭ-plā′sə-bəl) adj. Impossible to replace: irreplaceable antiques. ir′re·place′a·bil′i·ty, ir′re·place′a·ble·ness n. ir′re·place′a·bly adv. Thesaurus Antonyms Related Words Synonyms Legend: Noun 1. irreplaceableness - the quality of being irreplaceable
Definition of irreplaceableness in the AudioEnglish.org Dictionary. Meaning of irreplaceableness. What does irreplaceableness mean? Proper usage of the word irreplaceableness. Information about irreplaceableness in the ...