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Astronomy developed naturally as people realized that studying the stars is not only fascinating, but it can also help them in their everyday life. Data analysis has played a central role in astronomy since Babylonians, who laid the foundations for astronomical traditions that would be later maintained in many other civilizations. The main problem that astronomers face now is… as strange as it may sound… the advances in technology. We are building a hundred, even a thousand times more powerful telescopes. That suggests astronomers must deal with volumes of data they’ve never seen before.