Astronomy may be recognized as an interdisciplinary sciencewith great educational potential, but certain content requiresspecific structures for better learning; In this scenario the use ofa computational tool such as virtual reality can contribute tooptimize the teaching of this type of content. This paper presentsthe study on the implementation and use of a virtual planetariumin immersive environment, aiming to evaluate, respectively,familiarity and usability in the use of the tool. Methodologicallycharacterized as qualitative research, the data collection usedphysical questionnaires applied to student users. The results showedthat the developed tool had an excellent evaluation regarding itsusability through the results obtained in the SUS questionnaire.