Super Mario Galaxy/Headscratchers

When a Hungry Luma turns into a galaxy or a planet, it's new, and Mario should always be the first one on it, so how the hell do people like the Toads get the power star before Mario? And how have penguins supposedly been living there for years when you just caused the galaxy to be formed?
- Maybe the galaxies were born with built-in histories and organisms. We're part of OUR galaxy, after all. Not the best excuse, but it's better than nothing.
How did Bowser, after getting thrown into the hollow sun around the planetoid where he is last fought (which I assume to be the titular Galaxy reactor), end up on the smaller lava planet? And whether or not you can explain that, why did that world implode into the black hole when the hollow sun is so much larger, and had the Grand Star removed from it (which was being used for something)?
- It's possible he got punched through it.
- That may explain why he got there, but nothing else. And didn't he float there?
How the hell did Guppy get from Sea Slide to the bottom of the underground lake in Deep Dark Galaxy?
- Perhaps he's actually a Space Whale?
You're getting rid of the trash in the ammo depot by blowing it up. Because it's not like there would be debris or anything.
- And if you don't destroy all the trash in 30 seconds, all of it magically re-appears!
- Actually, when you think about it, it wouldn't leave debris, or at least nearly as much. It's ammo, so it'd probably explode with the bomb. However, the debris from ammunition would likely be shrapnel, which is infamous for being deadly. So blowing up an ammo dump just to clean it up would still be a HUGE mistake.
- Another shining question: Why the hell is the mission timed in the first place? There's no real explanation for why there's a strict 30 second timer on the mission. In fact, all that's ever said about it is when you fail the mission, when the robot chastises you and says "No, no, no! You gotta do it faster!"
  - Not to mention that if you fail, it says "There's always more". If there's always more, then what does blowing it up in the first place do? And why on earth (or any other planet) does it think that a just reward for completing a ridiculous challenge in a ridiculous amount of time is some unidentifiable piece of junk it found lying around?
As mentioned on the main page, if you talk to a Gearmo after failing to get all the purple coins in the Battlerock and Dreadnought Galaxies, you instantly die. Why does that happen? Did the Gearmo kill you? And if so, why?
- Because the game knows that the only way you're leaving the stage at that point is to die. You can't go back for the coins you missed, so the Gearmo acts as a way to put you out of your misery without having to jump into a pit.
And they never do explain where Peach gets so damn many 1-Up Mushrooms and how Bowser is stupid enough to let her send them to Mario. Or even how she knows where to send them.
In the storybook, how exactly did a little girl and a Luma build the Comet Observatory by themselves? It's mentioned that some furniture is buried within the comet of ice that they landed on, but how much, and how did they get it out?
- It's the Mario universe. That kind of thing can happen.
- Think of the storybook as a creation myth. These legends are usually filled with inconsistencies that get handwaved away because at the beginning of time things worked differently than they do now.
- That requires it to have been the beginning of time, when clearly she came from another planet that was already there.
What I'm confused about is the location of the original comet of the Comet Observatory. Is it the tiny planet with the houses that's the first planet you land on, or is it the star at the center of the entire Observatory? That star is the right size and color, it's just that it's a star, not a comet made of ice.
- I'm inclined to say the original comet turned into the tiny planet since that's where the house she built is. They appear to be connected in some bizarre way since she walks into the house and somehow shows up at the Gate dome of the observatory during the ending cutscene.
In Sea Slide Galaxy, everyone begs you to teach Guppy a lesson because he's hogging the sea all to himself. After you beat him, he suddenly has a change of heart, and helps you in future missions there, even being friendly towards the Toads and penguins. That's all fine and good, but when you go to Deep Dark Galaxy, suddenly the Toad Brigade is telling you to teach Guppy a lesson again! What happened between galaxies to make them hate Guppy?
- If he's not a space whale, maybe it's a different Guppy who is as mean as the first?