9. Gravity gravity gravity
10. see 1 to 9 above.
Gravity refers to the universal gravitational force first described (almost correctly) by Newton. No! merely spinning up Mir (referred to here as The Russian Space Station) does not allow you to walk up the central axis and along a side coridoor. No! you can't walk from the back to the front of the Space Shuttle crew compartment just because the engines are running. No! sucking the AIR out of a VACUUM CHAMBER in an Earth-based training centre does not make you weightless! I'm sure many sci-fi fans share at least part of my phenomenal ability to suspend disbelief but this scene just took the piss.
Surprisingly Armageddon was filmed with extensive NASA cooperation - I'm not sure whether this was also true of Deep Impact, where much more of the focus was on the human experience of those caught up in the events whether on Earth or in space.