Which planet is called a double planet?

Answer 1

None are. At one point Pluto was almost classified as one since Pluto and Charon's barycenter (the point they both rotate around) is between the two and not within Pluto. Pluto, however, is not a planet at all and so would have been a double dwarf planet had that definition been agreed on, but it was not.

In many, many years (billions) the barycenter of the Earth-Moon orbit will be outside the Earth's surface and so the Earth and Moon may be considered a double planet at that time.

Answer 2

Two planets orbiting each other.

The barycenter of the planets must not lie within either planet but must be in free space between them. (The planets orbit a central point as opposed to a planet-sattelite configuration where one body orbits another)

Answer 3

Pluto and its moon Charon are sometimes referred to as a double planet because they are similar in size and orbit around a common center of mass located outside both bodies. This designation is not universally accepted in the scientific community.

Answer 4

the double planet theory is very hard just ncopy and paste stuff

Answer 5

None of the planets are.

Answer 6

1957