Stars, Planets, Minor Planets and Moons: just arbitrary categories.
What makes a star?
"Well it shines it's own light." So does our Earth, you just can't see it because it's obscured by the crust. Of course, all that lava is shining underneath the crust even when it doesn't pop out at Mauna Loa or Iceland just as surely as a tree falls in a forest even when no one is there to see it. "Ah, if Lions could speak English, would it matter? After all, could we understand what they are talking about, English or no English, without really haven somewhat lived their life experience?"--Wittgenstein? But I totally digress.
Well, a star is made of gaseous plasma. We, and our planet: consensed matter. But your own eye tells you differently, not just Pierre-Marie Robitaille. Have you never seen a picture of the Sun?
The sun is extremely hot. So is the earth, but a short distance beneath the deepest mines, and certainly, at the core.
The sun is, said to be heated by fusion. Planets? By compression? Anyway, it's enough for it's own post--as if I know. . .
How about planets and minor planets and moons?
The new planet, now classified as a minor planet instead of as an asteroid, which just means, "space rock" in plain English: it is Ceres. Yet, it started out as a planet; if we consider classifications as valuable in any way, then Ceres was once a planet, and is again. Amen? But you know what's wrong with Vesta and Juno: basically they are as big as Ceres, but they are not round--just the shape of space rocks, or "rocks in space," except the size of a planet.
Then you know, Titan: atmosphere twice as thick as the Earth's. We quibble over the irrelevant detail that it circles Saturn rather than the Sun. Speaking of which, Saturn's sister planet Jupiter: does it or does it not give off a lot of radiation: kind of a cloud obscured fission version of a star or what?
Alright, as that Swedish Rumble channel owner says, "be good."