No matter what anybody says, it's the gravitational pull of the sun that the solar system is still holding. So black holes have gravity, so if black holes can play the role of the sun instead, then planets can orbit around black holes, and if they're lucky, wouldn't they create an environment where life can live? Around January 2020, Czech researchers wrote in a paper that although there are some restrictions, if there are enough planets orbiting around black holes, life can also be created. First of all, if you want a planet that's safe enough for life to exist around a black hole, you need to put the planet that was passing by through gravity into orbit so that it won't break down. Even if you don't have a planet passing by, you can actually produce them on your own with the materials that exist around the black hole. That means that the ubiquitous body of the planet that's needed to maintain the galaxy doesn't matter much. First, I was wondering if there could be a planet around a black hole. So how do we deal with the energy that life is trying to live in, the light? According to Dr. Pavel Bacalla of the University of Sillejian in Czech Republic, the light energy and heat energy generated by black hole activity can provide enough energy for life to work. The reason for this is that in order for life to survive on a planet, it usually absorbs the energy generated by the heat exchange caused by high-temperature parent star and low-temperature space trains, and it evolves and survives. So the planet needs enough light, but life can survive, so it has to maintain its orbit close to the black hole's "ground line." And what you have to be careful about here is that if you get too close, you're sucked in by the gravity of the black hole, and you're going to be destroyed by it. Also, radiation from black holes should not be active in the center of the galaxy to avoid causing death to life. Dr. Bacalla says that if there is no substance in the space around the black hole, the black hole itself will not emit radiation. But even with all these conditions, there's very little chance that life can survive. But even if these galaxies exist, it's almost impossible for us to find them. Because black holes absorb all the light around them, so what we find is a dark space. Now, of course, this is the limit of our current technology, and we might find these galaxies later on, and we might be able to survive there as technology advances.