This could be out there.

New, not-yet-peer-reviewed research is behind the reappearance of Harvard astronomerAvi Loeb. It's possible that there are four quintillion alien spaceships in our solar system, according to a new claim by Loeb. It would be a lot of flying saucers.

The study was spotted by the Daily Beast and is a follow up on the first discovery of an object outside our solar system. The nature of Oumuamua is still being debated by scientists. It sparked a lot of debate on whether it was an alien.

Alien Armada

He is saying that we should be open to that possibility. He wants to know how many 'Oumuamuas could there be in our solar system that aren't noticed.

They looked at the number of visitors we've already seen.

Calculating the density of similar objects in the solar neighborhood can be done using recent rates of detection of interstellar objects.

Three more objects have been detected by the astronomer since 'Oumuamua'. There could be up to 40 decillion objects in the solar system at that rate.

When limiting the scope to the "habitable zone" near the Sun, the number is brought down to 4 quintillion.

Some of his theories are boundary-pushing, but he always raises some interesting points.

Even if most of the objects are pieces of space rock, it still leaves room for some of them to be alien spaceships.

A Harvard scientist is looking for alien wreckage in the ocean.