There is a discovery that can subvert cognition, that is, we may be in a silent alien invasion, and the clues are hidden in an App that has been forgotten by most people.

This is not a science fiction movie plot, but a real case that was recently discovered while sorting through old mobile phones. Once upon a time, an astronomy enthusiast App called "SkyWatch" was all the rage, which allowed users to point their mobile phone lens at the sky and automatically identify stars, constellations and planets. After being updated a few years ago, this application gradually faded out of people's sight due to problems such as data accuracy and aging interface, and was replaced by a more powerful new application.

However, when I reopened it, I found a strange phenomenon. In the old version, no matter how the mobile phone moves, the cosmic background displayed by the App is always stable and predictable. However, when updated to the last version and used again on a cloudless night, the App began to display the "unknown celestial body" warning frequently. Initially, this was thought to be a software glitch in the app. After all, this app has not been updated for five years.

But curiosity drives us to dig deeper. The data of "unknown celestial bodies" in a week are derived and compared in professional star map software. The result is chilling. The trajectory of these "unknown celestial bodies" is quite different from the operation mode of any known natural celestial bodies, including meteors, satellites and even space station debris. Their motion does not follow Kepler's law, and there is no abnormality that can be explained by the earth's gravitational field. On the contrary, their movements are more like purposeful.

What is even more bizarre is that the data of these "unknown celestial bodies" actually does not exist in other mainstream astronomical apps. I tried more than a dozen different applications, including NASA's official map tool, but I couldn't capture these weak signals. It's as if there is an invisible technology that is cleverly shielding their existence.

This is reminiscent of a bold assumption. What if these "unknown objects" are not natural phenomena, but some kind of reconnaissance or detection equipment deployed by aliens? The reason why "SkyWatch" can capture them may be because its data processing algorithm is too old and "simple" to be affected by more advanced "filtering" technology. It is like a forgotten window, which inadvertently gives people a glimpse of the truth.

This kind of invasion is completely different from the massive attack we imagined. It quietly sneaked into our orbit and may even have entered our stratosphere by deploying a large number of miniature and hidden devices. These devices may be collecting biological data of the earth, electromagnetic wave information, and even our culture and thinking mode.

And the forgotten "SkyWatch" App is showing us these invisible intruders in the most primitive and uncut way. It is not a perfect evidence, but it is a disturbing warning. It tells us that when we are immersed in the latest wave of science and technology, the real secret may be hidden in the corners that we have abandoned.

So, the next time you are sorting out old things, you might as well look at those apps that you have forgotten. Perhaps what you hold in your hand is the key to the unknown universe.

（Writer：Tommy）