Earth and the Moon.
Some consider it to be a double planet or, more properly, a double dwarf planet. However it is currently not officially considered as such.
None. Pluto-Charon was almost considered one in 2006, though that would be a dwarf double planet rather than a true double planet as Pluto is not a planet. In billions of years the Earth and Moon will be a double planet. Also, the question is non-sensical because if it was a double planet then they would both be planets... so there would be no moon. A planet would be considered a double planet with it's opposite planet, not moon.
There are no double planet systems in our solar system. The closest to being considered a double planet are Pluto and its largest moon Charon, but since Charon is significantly smaller than Pluto, it is not classified as a double planet system.
First of all, Pluto is not a planet. It was considered a double planet because its largest moon Charon is half its size.
yes
When Pluto was still officially considered a "planet" in our solar system, it and it's moon Charon were considered by many to be a double planet system. Whenever a moon constitutes a considerable percentage of the host planet's mass, it may be considered a double planet system. For this reason, some consider the Earth and our moon to be a double planet system. Our system has by far the greatest planet to moon mass ratio; about 6:1. As for planets outside our solar system, I cannot say. Though there are many out there.
Neptune is the farthest planet from the sun. Pluto's orbit is sometimes farther out, but Pluto is no longer considered a planet.
A double planet describes two bodies of similar size and mass that are in orbit (not necessarily around each other) . The Earth and Moon would not be considered a double planet because of the great size and mass difference between the two. However, Pluto and its moon Charon COULD be classified as a double planet- both have similar sizes and mass, and orbit a point outside of one another.
No, because Pluto has been reclassified as a dwarf planet. Dwarf planets are not planets, despite the confusing term. Before Pluto was reclassified as a dwarf planet, sometimes the Pluto-Charon system was thought of as a double planet, so you can sometimes find that in outdated but authoritative-seeming references.
It's not. Also Jupiter has more than one moon.
Mars, because of the red dust, sometimes you can even see it without equipment.
The farthest planet from the sun used to be Pluto. Pluto is now considered to be a dwarf planet, not a planet. When Pluto was a planet, its orbit would sometimes take it closer to the sun than Neptune, making the Neptune the farthest planet from the sun for that period of time.