As powerful as a "black hole", what is the mysterious constellation in the inner world?

In the twelve constellations, the psychological state of each constellation is different. Some constellations are so simple that people can see through them at a glance. They are naive and full of goodwill towards the world, thinking that the world will be beautiful and there will be no distractions, but the inner world of some constellations is mysterious.

You can't guess what he is thinking. Maybe she's thinking about the structure of the universe, maybe she's thinking about what lunch will be at noon tomorrow, which is really puzzling, because his inner world is really mysterious. Everyone can't grasp the point. For example, Gemini, whose mood is changeable, has a mysterious heart. Gemini, like a black hole, has a changeable personality. He is hard to fathom. You don't know what he will think. You don't know what he is thinking from his appearance.

It's like, one second ago, he was full of enthusiasm for you, and you think his heart is like this. He is warm, polite and easy to get close to everyone. When you make up your mind to contact him, the next second, he may become an iceberg. At this time, you will stop.

Because you are not sure what his heart looks like now, just like his appearance and her heart are cold, so cold that you can't get close. Maybe his inner world just doesn't want to be disturbed, which makes people very entangled. Gemini's heart has always been incomprehensible and mysterious, just like a huge abyss, you can't see the end.