Summary: The top 10 encapsulates the history of human aviation; at #1, a Google Doodle celebrating the 216th anniversary of the first parachute jump; at #10, the enduringly popular scifi film Gravity, a paean to human spaceflight. It's odd to think it's taken us 200 years to travel about that many miles up.
For the full top 25 report, including analysis and exclusions, see: WP:TOP25.
For the week of October 20 - 26, the 10 most popular articles on Wikipedia, as determined from the report of the 5,000 most trafficked pages* were:
A rarity in the top 10, but the 3rd most popular Wikipedia article from 2010 to 2012, and a perpetual bubble-under-er. Not really surprising that the country with by far the most English speakers would be the most popular on the English Wikipedia.
Alfonso Cuarón's spaceborne action/art film is now the critical/commercial blockbuster of the year, combining a nearly $370 million, 24-day worldwide box office take with a 97% rating on Rotten Tomatoes.