Description

1. Comet Theory: Suggests 'Oumuamua is a comet from another star system, with outgassing that caused its unusual acceleration. Had no tail so probably not it.

2. Asteroid Theory: Posits that 'Oumuamua might be a rocky asteroid ejected from another planetary system. It showed none gravitational acceleration so probably not it.

3. Hydrogen Iceberg Theory: Proposes that 'Oumuamua is a fragment of a hydrogen ice-rich body, which would explain the non-visible outgassing.

4. Nitrogen Ice Fragment Theory: Suggests 'Oumuamua could be a piece of an exoplanet rich in nitrogen ice, similar to Pluto.

5. Alien Technology Theory: Avi Loeb's hypothesis that 'Oumuamua might be an artificial object, such as a light sail from an advanced extraterrestrial civilization.

6. Solar Radiation Pressure Theory: Some scientists have considered the possibility that 'Oumuamua is a large and delicate structure pushed by solar radiation pressure.

7. Rogue Comet Remnant Theory: Another theory is that 'Oumuamua is the remnant of a disintegrated rogue comet.

8. Interstellar Dust Aggregate Theory: A less common theory that 'Oumuamua could be a dust aggregate from interstellar space.

I think the trajectory is strange. What do you reckon the odds are that Oumuamua passed by mercury, Venus, and earth that closely?