In this episode "Cielos despejados" was given the task of answering the following questions from the audience:
1. Are the chemical elements of the Earth present in the other planets? Does the Earth contain all the possible elements synthesized by the Universe? Are there other elements that we do not know about?
2. There are elements that create stars like helium, carbon, iron. But how are the rest of the elements of the periodic table created? Some are radioactive, what makes them of this nature?
3. What minerals can be found on the Moon?