Astronomy, astrophysics and planetary science are testimony of humankind’s curiosity. A peculiar feature of this curiosity is that it is not satiated by a hypothetical or mythological explanation; on the contrary, any unconvincing explanation only adds fuel to the curiosity. Humankind doesn’t stop at contemplating the various possibilities, but explores and investigates the problem using whatever tools are available at its disposal — theoretical calculations, experimental measurements, or even space missions. Understandably, it doesn’t stop at finding answers to immediate problems, instead every resolved problem pushes the boundary to investigate further, farther, deeper, more. We haven’t yet completely understood the earth, our exploration of the planets is still an ongoing process, and we have already started seeking the boundaries of our solar system, and what lies beyond it.