Well this thread is practically useless now, and this conversation is pointless. So this will be my last statement on this thread, whether you reply back or not.
You asked:
There is one bound orbit that doesn’t have negative energy. What type is that again?
Where I responded with:
Elliptic orbits are the only ones with negative energy since it's a periodic orbit.
Then you claimed:
The correct answer is circular orbits, which are bound orbits with ZERO energy.
Yet you say:
That isn’t what I said. I said circular orbits are elliptical orbits. They are a kind of elliptical orbit. Just like a square is a kind of rectangle.