Today we completed the section on exoplanets by watching the final minutes of yesterday's documentary. Jared - as always! - had excellent questions, specifically on orbits and spacecraft (in relation to the Kepler mission that has discovered some 4000+ exoplanets). So I took the opportunity to discuss a little bit more on the physics of electromagnetic radiation, and why certain detectors (for X-rays and gamma-rays) need to be placed in space, and why some observatories (e.g. infrared) are located in Antarctica. We also re-visited particle physics, so we could include a segment on neutrinos (elusive, almost mass-less particles that are a direct consequence of nuclear fusion e.g. in the Sun), and why neutrino detectors need to be placed deep in disused mines, for example. The groundwork is now in place to start on the Sun tomorrow.