I saw this over the weekend. It was supposed to be a red giant. It collapsed down to a white dwarf then exploded with a pair of 'Praxis rings' A few seconds later the planet exploded and sent debris throughout the galaxy. One planet had a dual ring system, one set about 60 degrees off from the first, with giant (3/4 planet diameters) spikes sticking out one side.

The opening sequence had a lot of Bad Astronomy in it, and there was more sprinkled through out the movie in different places. On was a reference to the "28 known galaxies", another that I'm not sure I heard corrently was that superman was zipping around the globe at nearly the speed of light. In the atmosphere. No word on the damage from the shockwave from that. He does go through the sound barrier a lot in the film though, so they seem to know about that...

All in all, a good enough movie, and not really the travesty many were expecting. It's set 5 years after the first one with Christoper Reeve, and yet everyone is 10 years younger...

For the other geeks out there, The Spiderman 3 trailer pretty much comfirms it's the Venom story line.

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A Nerd can figure out how long it will take the original Enterprise traveling at warp 6.5 to travel from Regulus to Antares.
A Geek will think he can use that to pick up a girl in a bar.
A Dork knows he can't pick up the girl with it, but will hang around for hours anyway, just in case she asks.
She might. You never know.