Mad idea: Earth and moon started off as bi-lobate.

[folaht]

..or double lobed.

Known

Very small

• Martian blueberries.

Large

• 67P
• Ultima thule

My suggestions

Large

• Oumuamua (Cigar shape was based on it's brightness and bi-lobate is probably not considered as common in gravitational science.)

Planetary sized

• Earth and Moon. - They're said to be similar in composition right? https://www.latimes.com/science/science ... story.html
• Pluto and Charon. - They look like a mini-earth and mini-moon, so perhaps they are.
• Many other exoplanets. - Thus I also predict we'll be able to at least find exoplanets that are still attached to their moons.

[Maol]

With N & S magnetic poles an external electromagnetic force could accelerate rotation, like an armature in an electric motor, until eventually the centrifugal force would stretch them apart.

[folaht]

Another story that supports my theory.

https://www.nationalgeographic.com/scie ... 4-zircons/

I thus assume that a piece of earth rock was still attached to the moon when the two split apart.

[Webbman]

given that all the planets have a center ring/disc as a result of magnetic n and s poles would it not be reasonable to expect that a constriction is also possible here and would lead to a lobed structure.

in my view this lobed type structure is the same structure a neutron would have being constricted in the middle by an electron ring.

[nick c]

If the Moon and Earth were originally one object, and the Moon separated from the Earth, then I would expect that the lunar orbit would be in the plane of the Earth's equator, but it is not.
The Moon appears from Earth to move through the ecliptic, which is the plane of the Sun. Most moons in the Solar System orbit in the primary's equatorial plane. Those that don't are considered to be captured objects.
So, while not conclusive, that seems to me to support the theory that the Moon was a preexisting solar system object which was captured by the Earth.