8:20 Neil: Doesn't giving something the wrong label blind us to the truth? (The guy's an astrophysicist AND a linguist!) Thinking that Pluto was the last planet in our solar system closed our minds to the other objects in the Kuiper belt. In fact, those other objects are seen in data from decades ago but were never "discovered" in their time.
-Several objections to that point. That it's easy to find those objects in old data now because we can backtrack from what we see today.
Neil: Are we wrong to use our own solar system to build the classification system?
Jack: Earth was not originally considered a planet. Planets were the things like the Sun and Moon that orbited the earth. When Copernicus came onto the scene, the Sun and Moon were no longer called planets and the Earth became one. (You know that feeling when you realize our species probably doesn't know a darn thing, even in 2009?)