Will other Anime/Manga characters ever surpass Goku?

[DBZGTKOSDH]

From the looks of it Kid Buu's attack touched the planet and eviserated it

It's possible that the Ki blast went quickly inside the planet & destroyed it. We've seen extremely fast ki blasts, like this:

Spoiler:

And as shown by Freeza if you try and destroy the planet by just destroying it's core you'll have to wait 5 minutes for it to blow up

I personally believe that by destroying the core destroys the planet after some time (like 5 minutes for Namek), but by destroying the core with much greater power, the planet explodes instantly.

Also Cell's Kamehameha showed no signs of going anywhere near the Earth's core yet Goku was still worried that it would destroy the Earth

Cell fired a much stronger Kamehameha at the same position, and Gohan countered it with his own Kamehameha, and after an even clash, Gohan defeated Cell, and no planet exploded. So, Goku was just being cautious.

How do you explain DBZ characters destroying completely solid celestial objects like the moon?

Kamehameha dives into the Moon's solid core, the Kamehameha explodes violently from the inside, and the moon gets destroyed.

Extra: As for destroying a solar system (I believe that Cell could do it), you destroy the Solar System's "core", which is the Sun, and the Supernova that is produced takes all of the planets around it into the explosion, destroying them.

But I don't believe that anyone so far (neither Whis or SS4 Gogeta) can destroy a galaxy with a single attack. Broli destroyed the South Galaxy after time, not with one attack.

[Polyphase Avatron]

I see nothing wrong using physics in DB? People use physics for stuff like Marvel, DC and Star Wars. So why not?

Physics can explain how getting bit by a spider gives you super powers? Or how a green ring can let you create things with your mind?

[rereboy]

I see nothing wrong using physics in DB? People use physics for stuff like Marvel, DC and Star Wars. So why not?

Physics can explain how getting bit by a spider gives you super powers? Or how a green ring can let you create things with your mind?

They actually can. They are Science Fiction explanations however.

The spider was hit by a radioactive ray which, in a one in a million fluke, caused the spider to mutate in a very particular way. Peter Parker, by being bitten by that spider, had some of that mutation transfered to him, which rewrote his dna, like some kind of a genetic virus.

As for the green lantern ring, they are devices created by aliens who are billions of years old. Their technology is millions of years ahead of ours. It can read the user thoughts and use its particular energy to create out of that energy what the user is visualizing. Like a computer able to read the user's brainwaves and create solid holograms.

Marvel and DC usually have those kind of science fiction explanations. Dragon Ball hardly bothers with that.

[Polyphase Avatron]

But those explanations are still just fantasy/pseudoscience. Not real physics.

[rereboy]

But those explanations are still just fantasy/pseudoscience. Not real physics.

That is why its fiction.

Dragon Ball is also fiction, but it doesn't even bother to come up with pseudo-scientific explanations most of the time. You think that the author cared about any kind of scientific explanation for why the moon blowing up doesn't cause any relevant damage on Earth for example?

[TheGmGoken]

But those explanations are still just fantasy/pseudoscience. Not real physics.

That is why its fiction.

Dragon Ball is also fiction, but it doesn't even bother to come up with pseudo-scientific explanations most of the time. You think that the author cared about any kind of scientific explanation for why the moon blowing up doesn't cause any relevant damage on Earth for example?

Did it even matter? If it has no importance to the plot then it doesn't need explanation