Back it up. Reset your phone and then restore your the backup. I cleared a tonne of old app data that way.

No you need a launch ticket, which is good for however long it takes to launch.

I’ve seen a shuttle launch and a SpaceX launch. Closest you (and anyone) can get is the SaturnV viewing centre at KSC. It’s 3 miles from the pad. You need to buy tickets in advance for this location. Highly recommend this spot. Great view plus all the facilities nearby (food and loos). Tonnes of other public locations but nowhere near as close. No one can predict if launches will go on time, just have to cross your fingers.

Are atoms immortal or will they eventually break down into their sub atomic particles?