Would ''The Stranger's'' (Marvel Comics) planet be possible?

Factual Questions
1

Several decades ago (Issue 115ish), The Watcher warned–breaking the Watchers’ Creed once again–the Fantastic Four that “From beyond the stars shall come the Over-Mind, and he shall crush the Universe.” (ewww, scary!) (Issue 115ish)

The Over-Mind (née “Grom,” or “Gorm” as it was spelled on one page) was the living embodiment of his entire planet–all packed into one individual. One seriously bad mfer.

After kicking some serious FF ass, the cavalry rides to the rescue in the form of an awesome being known as “The Stranger,” who had an origin similar to that of The Over-Mind, with one big exception–his planet was bigger.

Much bigger.

How big you ask???

Check this out: “It dwarfed galaxies.”

That’s big.

And probably–from a physics standpoint–not likely.

Any comments??? Did Marvel commit a fundamental error in physics?

*In fact, it seems that his planet was attacked by the Over-Mind’s planet–but it’s been a very long time, so some of my details are probably rusty.

2

Goodness gracious! I find it hard to believe that a comic book would get its physics wrong!!!

But, thinking about it, for an object to be much larger than galaxies, and to have the density of a planet, it would have to have some serious mass. I’m not sure, but I would think that it’s comparable to the mass of the Universe. There’s no way it could be that massive unless it were made of Hydrogen - there’s just not enough of other elements.

Hmmmm, also, to keep from flying apart and not violating Relativity it would have to rotate extremely slowly. One “day” would be a few million years.

Now that I think about it, it would almost certainly be a black hole. No way!

3

It could be a mega-Dyson-Spere: just a hollow shell, but what a shell…

4

I think even a shell one atom thick that big would still be enough mass to cause a black hole. :slight_smile: