Exploding Sun

One point about science fiction movies, is to impress the viewer with science or technology that could once be real. But in this movie nothing makes sense about science. Not speaking about the bad and slow plot with sometimes terrible unreal action performances.

Just to name a view paradox: -they are close to the sun, but are communicating on video phone in real time. The signal would take at least 7 minutes between the sun and earth. (later they correctly state that the impact would only be seen 7 to 8 minutes later on earth.) -As the engines don't work and they float around the moon they experience g forces! In reality they would only feel 0 gravity on board because the gravitation of the moon and the acceleration of the ship would cancel each other out. Same like a space ship in orbit. -How comes that its always daylight in USA and Afghanistan at the same time? -When he is activating the bomb manually in space (0 bar airpresion) he would explode. -the sun is 330000 times bigger than the earth so an impact would we like a tear drop into the oceans. And most probably the space ship would melt long time before it would hit anything solid. At least I don't know anything that wouldn't at 6000 kelvin. Even Ta4HfC5 already melts at 4488 K.