I didn't say what it was, I'm saying what it isn't.
And that is aliens from places other than Earth.
And here is why...
In our solar system, we are in a very remote and isolated area.
The technology needed to visit us is not only beyond our abilities, it's beyond our imagination. We're still using fossil fuels to reach space. Sure, we have terms like sci-fi like lightspeed, warp speed, and hyperspeed, but the ability to achieve those speeds we're clueless.
The Kardashev scale is a great reference for this.
https://www.space.com/kardashev-scale
https://en.wikipedia.org/wiki/Kardashev_scale
Kardashev first proposed 3 levels of civilization.
Some of the attributes of a Type 1 civilization are, growing past the ability of self-extermination, controlling the weather, preventing earthquakes, volcanos, hurricanes.
Now, for an alien species from beyond our solar system to visit us they would have to be a Type 2 civilation.
Let's look at the requirements for a Type 2 civilization.
Key attributes of a Type 2 civilization:
- Stellar energy capture:
The primary defining feature is the ability to capture and utilize the majority, if not all, of the energy radiated by their star, usually through a Dyson sphere or similar megastructure that surrounds the star and collects its solar radiation.
- Interstellar travel capabilities:
With such immense energy reserves, a Type 2 civilization would be able to readily travel between stars, potentially colonizing other planets and systems.
- Advanced engineering and technology:
Constructing a Dyson sphere or comparable megastructure requires incredibly advanced technology, including the ability to manipulate matter on a massive scale, advanced robotics, and sophisticated energy manipulation systems.
- Solar system-wide control:
A Type 2 civilization would have complete control over their solar system, managing planetary movements, asteroid belts, and potentially terraforming planets to suit their needs.
- Potential for societal changes:
The immense energy and resources available could lead to significant changes in their society, potentially including advanced life extension, near-perfect resource management, and a highly coordinated galactic presence
Seriously, the Kardashev scale is a great rabbit hole to go down.
Anyway, currently we have objects being spotted hovering in the sky, not even a low Earth orbit but just the sky. Our below Type 1 civilization has spy satellites that can view objects 5mm in size from orbit. An alien civilization, tens of thousands of years more advanced than us, wouldn't need to be just hovering in the sky to see what they want.
This certainly isn't an attack.
Aliens could do that without being seen.
And, aliens surely wouldn't need little red or white lights on their craft letting us know where they were so we wouldn't hit them with our comparatively simple crafts.