For me, the big question this week was, "How can we understand various concepts and processes of space and the universe's origin?" What did you do in lab today? In lab this week, we heard presentations from each table group and Ted about the origin of the universe, the life cycles of stars, the origin of Earth, galaxies, black holes, and space exploration. My group presented on the origin of Earth. Below are the key things I learned from each group: Origin of the Earth (my group) Origin of the Universe As we know it, the universe is 13.7 billion years old. The Big Bang was the origin of the universe , not the origin of Earth. It is an expansion, not an explosion. The Big Bang created atomic structure among millions of other things. Atoms started to combine with each other to form new elements with atomic numbers up to Iron. Life Cycles of Stars Stars start in a cloud of dust (nebula), then become either a Average or Massive star, then either a Red Giant or ...