All planets lie in the plane of their orbit, but most spin on an that is nearly (many have tilted axes of spin) perpendicular to that plane. The one exception is the planet Uranus which has its axis of spin lying very close to its orbital plane.
The question doesn't make much sense. I think it probably should say: "an axis parallel to its orbit plane". In that case, the answer is that Uranus (not Neptune) is the only planet that rotates on an axis parallel (roughly) to its orbit plane.
There is no dwarf planet named Churon. Charon is a real object, though. it is not a dwarf planet, however: it is the largest moon of the dwarf planet Pluto, which has an elliptical orbit that lies mostly beyond the orbit of Neptune.
Dwarf planet
The orbit of each planet is completely in a plane. That is, the whole orbit would lie on a sheet of paper if you had one big enough ... there are no lumps or bumps in the orbit that rise out of the paper or droop below it.It's important to understand, though, that the orbits of all the planets don't all lie in the same plane. They're all close, but they're all different.The plane of the earth's orbit is what we call the "Ecliptic Plane". The line where the ecliptic plane intersects the "bowl" of the sky is the circular path through the stars that the sun appears to travel in the course of a year.Compared to the ecliptic plane, the plane of Mercury's orbit is tilted about 7 degrees, Mars' orbit about 1.9 degrees, Saturn's orbit about 2.5 degrees, and our moon's orbit about 5.5 degrees. This is why the sun, moon, and planets all appear to move through the same narrow band in the sky, though not exactly along the same line.People have noticed this for thousands of years, and concluded that there must be something special about this narrow band in the sky. They ascribed special characteristics and influences to that strip, and to the stars and constellations in it. That series of constellations are the familiar 12 of the band called the 'Zodiac'.
Uranus
Uranus
Uranus. It is tilted on its side by 98 degrees.
The plane with the smallest orbit is Mercury, and the planet with the largest orbit is Neptune.
The Earth.
There isn't one. They all orbit in roughly the same plane. Pluto orbits in a different plane, but that's not classed as a planet now, of course.
The question doesn't make much sense. I think it probably should say: "an axis parallel to its orbit plane". In that case, the answer is that Uranus (not Neptune) is the only planet that rotates on an axis parallel (roughly) to its orbit plane.
That plane contains what is called the celestial equator, the projection into space of earth's equator. Not to be confused with the ecliptic, which is the plane containing earth's orbit around the sun.
I assume you mean "around the Sun". That is the Earth's orbit. The plane of this orbit is called the ecliptic.
There is no dwarf planet named Churon. Charon is a real object, though. it is not a dwarf planet, however: it is the largest moon of the dwarf planet Pluto, which has an elliptical orbit that lies mostly beyond the orbit of Neptune.
Pluto. I missed it on a Physics test and I will not forget it.
Saturn is the sixth planet from the sun. Its orbit lies between the orbits of Jupiter (the fifth planet) and Uranus (the seventh).