Note: There is a special note to teachers at the bottom of this post. If you're a teacher, please be sure to check it out! My friend Tina is a teacher at the Saegert Sixth Grade Center in Austin, Texas. She asked her sixth grade students to send me questions they had about astronomy, and I answer them on camera. There were so many I had to split this into five parts! I'll be posting one part every day, first thing in the morning. To catch you up, check out Part 1, Part 2, Part 3, and Part 4. Below is Part 5. I only have one question in Part 5: What is the Big Bang theory, and is it real? This is the last installment of this video series, but I think it has a bigger and more important message than the other four. That starts at 2:54 into the video. I got the wind in me, and decided I would take the opportunity to pontificate a bit. SPECIAL NOTE TO TEACHERS: Many schools block access to YouTube. There is another video hosting platform called TeacherTube, which is designed to be used in schools. I've uploaded this video (Part 5) to my channel there, where you can access it in your school (note: the video is in higher-resolution on YouTube). If you do, please let me know! I'd love to know what the students thought of the video -- warts and all.