This presentation discusses the science of Double Stars. In short: The value of Double Stars is that through determination of two stars in gravitational/mutual orbit, you can derive the stellar mass. From the stellar mass, current astrophysical theories can be refined to greater detail with greater assurance. Where Variable Stars rely on Photometry, Double Stars rely on the process of Astrometry.
This lesson covers the second phase of giving an excellent presentation: production. From constructing effective visuals to avoiding mathematics, this will cover all the ways a presentation can be enhanced by the slides behind it.