Moon

This one might be a long one. In the Enies Lobby Arc, we see an orrery of some kind in Ohara, an island that used to be in the West Blue. That orrery depicts Earth having six moons which would explain the erratic weather in the Grand Line. It’s known that there used to be an ancient civilization on one of the moons and that civilization are the ancestors of the Skypieans, Birkans, and Shandorians. That moon civilization had very advanced technology and architecture, but they left due to the lack of resources and they went to Earth which took place over 1,000 years ago. I think that Imu, if he/she truly is immortal, and the old ancestors of the Celestial Dragons are from another moon which is why the current Celestial Dragons wear space suit like outfits (I’ll refer to them as Ancient Celestials for simplicity). I think that the Ancient Celestials went from moon to moon greedily taking what they can in terms of resources, power, etc. and when nothing was left on the moons, they finally went to Earth, but they arrived after the people of the Moon civilization who, by then, greatly befriended the tribes and people that were already there: Giants, Minks, Humans, Buccaneers, etc. and formed a very harmonious, advanced Kingdom. The Ancient Celestials who arrived during the height of that Kingdom were welcomed with great kindness, but they eventually grew envious of the Great Kingdom and coveted the resources, power, wealth, etc. that the Kingdom had gained. As the Great Kingdom continued to rise in power, the Ancient Celestials bided their time, becoming fierce fighters, warriors, and creating weapons. As they did that, they created Houses: Nerona, Nefertari, Donquixote, Jaygarcia, Topman, etc. and the heads of those Houses named themselves Kings. When the Ancient Celestials were ready, they waged war against the Great Kingdom. I think that the people of the Great Kingdom were complete pacifists who had never or at least very rarely knew war or violence. The advanced technology they had was used to harmonize with the land, the sea, the sky, the animals, and the people, all of which was freely shared amongst everyone and was not used for war, battle, or greed. I think they built the Ancient Weapons Uranus, Poseidon, and Pluton out of desperation. As the war was nearing an end, they created the Ponegliffs to tell their story and the Ancient Celestials won soon after and created the World Government. I think Imu created the Five Elder Star ranking system who would “rule” the World Government, naming the ranks after the moons which they came from; Ju Peter, Saturn, etc. What do you all think?

The symbols in Kozuki's crest, the pseudo-Christian cross in Kuma's church and other symbols (Like signs or tattoos in Shandia, Alabasta, and Fishman Island) have one spot encircled by 8 small spots. Could this be the Earth and the 8 no-more-existing(?) moons/planets, that we can see in the Ohara library's 3d model?

Are there theories about this? (Probably yes lol :)).

There are many indications that 800 years ago there were 6|7 moons orbiting the One Piece planet, for example the noble families of Wano Country/Golden Country had their names inspired by 5 moons.

Shimotsuki Family = (霜月) frost moon

Kozuki Family = (光月家) light moon

Kurozumi Family = (黒炭家) black charcoal

Amatsuki Family = (天月) heaven moon

Uzuki Family = (雨月) rain moon

Fugetsu Family = (風月) wind moon

I think blackbeard ate the mythical wendigo devil fruit.As the mythology of the wendigo strongly draws insperation from werewolf mythology.I also think that's the reason for why blackbeard feelt such an immense pain when ace burned him alive.As wendigos only weakness would be that of the element of fire.Also i think this would tie in strongly with the elbaf arc because the wendigo is said to be a wolf or deer that grows in proportion to the number of people that it eats.It's also very similar to that of the wolf of fenrir within norse mythology.As the wolf known as fenrir within norse mythology also grows in size in proportion to the number of people that it has consumed.The devil fruits ability would also allow him to eat eight devil fruits.Symbolizing the eight moons of the one piece world.Wendigo's are also said to be evil spirits that can strongly relate to that of demons or devils

It's ranking time again. The story of OP is driven by the many mysteries of it's uncharted world, from the depth of the Blue Sea to above the clouds of Sky Ocean and beyond to the Moon. Here are the top 10 places that are yet to be fully explored.

1. Laugh Tale

The final island in the New World and holding the greatest treasure One Piece, Laugh Tale holds all the secrets of the world. At some point, Joy Boy came across an island, which would later be named Laugh Tale by Gol D. Roger, and left behind a treasure that would come to be known by the world as One Piece. The only way to reach this island is to have all 4 Road Poneglyph, making almost impossible to find the island itself.

Location: New World

2. Great Kingdom

Lost to the history, this great kingdom once was a powerful and higly advanced civilization. The kingdom itself thrived during the Void Century 800 years ago and was supposedly destroyed by the 20 kingdoms now known as the World Government. It's said that the 3 Ancient Weapons came from this kingdom. The true name of this Kingdom is yet to be known.

Location: Unknown

3. Moon

The moon has always been integral part of the story from the Kozuki Clans to the Minks tribe. There're total of 6 moons in which one of them having the ancient city called Birka also known as Fairy Vearth by the Skypieans. It was originally the home to Moon People, the ancestors of the Skypieans. The Moon People were shown to be highly civilized by their technology and architecture perhaps they have connection to the Great Kindom?

Location: Outer Space

4. God Valley

The legendary island in which the God Valley incident took place. Here the final battle between the combined effort of the marines led by Garp and the Rogers Pirates, against the Rocks pirates took place. The result of this event would give Garp the title of "Hero of the Marines". However the island ends up mysteriously vanishing, leaving no trace of existence. It is likely due to the Buster Call ordered by the Marines to cover up whatever secrets the island held.

Location: Unknown

5. Marijoe

Although it's well known as the capital of the World Gov, this place still holds many secrecy. This is also where the highest power of the World Gov the World Nobles and the Five Elders resides. But as the story portrays Imu being the true ruler of Marijoe. The Reverie is held here every 4 years, where the 20 nations of the World Gov gather. Somewhere within the Pangaea Castle of Marijoe holds a national treasure that could shake the world, as stated by Doflamingo.

Location: Red Line

6. Florian Traingle

The Florian Traingle, one of the biggest mysteries in OP. It's a stretch of sea between Water 7 and Fish-Man Island. Covered in dense fog blocking all sunlight, over 100 ships goes missing within it every year. But the real mystery of Florian Triangle are the 3 giant shadowy figures looming within the mist, perhaps they're the real reason that many ships and people disappear without a trace.

Location: Paradise

7. All Blue

There's a point in ocean where all the blue seas connects and marine life of all 4 seas co-exist. It is truly an every chef's dream. It is only speculation if this legendary sea even exist, but many theories suggest that it is yet to exist through the destruction of the Red Line, connecting all the seas and destroying the Fish-Man Island in the process.

8. Elbaf

Considered to be the strongest nation in the world, which even the Marines feared. Elbaf is the kingdom where the giants inhabits said to be the strongest race as even Big Mom wants them as an ally. Much is yet to know about this kingdom, other than it's ruled by a monarch and it is suspected that the World Tree exist here.

Location: New World

9. Enies Lobby

Also known as the Judicial Island of the World Gov and the former HQ of CP9. After the events of the Water 7 saga, Enies Lobby was destroyed by Buster Call, however the island itself was still intact. But what makes this place into this list is the structure of the island and the environment surrounding it. The island is constantly shrouded in day-time even during the Aqua Laguna and the main land is suspended in mid air supported by thin bridge of land, under it is a large waterfall of void.

Location: Paradise

10. Tequila Wolf

Although it's dubbed as a country, it's actually a construction site of a massive bridge. One of the least talked mystery of OP, but the bridge itself holds great importance as it was meant to connect 2 important places. Upon demand of the World Nobles, this huge project has been going on for 700 years since the early days of the WG. After the 2 year time-skip the slaves who were forced to work there were freed by the Revolutionary Army and it's currently unknown what happened to the place.

Location: East Blue

Note: There were few places almost made it to the list, like the moving Onigashima. Let me know if there're any other islands that deserved to be on the list.🗺

In Ohara we saw the model earth. If my memory is correct, there were like nine moons around the world right? So how do the moon cycles work? This would effect the sulong transformation aswell since they can only do it when it’s a full moon.