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Since humans first measured the earth with their steps, the desire to explore space has never stopped. The seemingly simple question "where are we?" Has always had a tentative answer since humans began to understand space, and is constantly being replaced by new discoveries. In early civilizations, ancestors used myths to establish the original answer to "where." In the Bronze Age, people had created complex conceptual maps and were able to use the stars to find their way. In the Middle Ages, as the tools of calculation and navigation became more sophisticated, the discovery of a new continent revolutionized our understanding of "where" and the ensuing exploration quickly filled in the blank spaces on ancient parchment maps. In this day and age, telescope lenses have brought us closer to the sky, and new planets have been discovered. Planets are rapidly turning into galaxies, and new theories are gradually reshaping the entire universe. Past theories have either been confirmed or overturned, but our pace of exploring space has never stopped. The ever-changing concept of "where" is also waiting for "later us" to explore.