We're talking about the biggest possible planets today, and I decided to divide the episode into two parts.

Easy mode and a hard mode. And we'll do the easy mode first and then obviously do the hard mode second because there's

only two parts in the easy mode comes first anyway the easy mode is asking the literal question

what is the biggest planet and in order to get into this and this will be a recurring theme

throughout the episode when i say biggest or you say biggest, or anyone says biggest,

we need to define what that means because there's a difference between size and mass.

We need to say, or do you mean the most massive planet?

Do you mean the largest planet?

Because there can be large planets

with low density and small planets with high density. Both of them have the equal amount of mass,

so which one is bigger? And we run into this issue, because as we start looking at big planets,

both in terms of size and mass, we start edging into brown dwarf

territory, which itself is hard to define because it exists as a category between stars and

planets. And now we're talking about the lower boundary of that category. We're looking at

what happens when planets become classified as brown dwarfs,

which might just be a category in its own right. It gets complicated real quick because these

boundaries are fuzzy. Usually the bottom edge of a brown dwarf definition is around 20 times

the mass of Jupiter, and the upper edge of the brown dwarf range

is 80 times the mass of Jupiter. That upper end is when hydrogen fusion kicks in, and you've

entered the main sequence, and you're powering yourself for millions or billions or sometimes

even trillions of years. That's a star. You're just definitely a star if you're at least

80 times the mass of Jupiter. At the lower end, the usual lower boundary, and I did a whole

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