"black hole"

Between the Earth and the Moon there exists a much more empty space than imagined, so what can be put down in this space?

In this 5.5 million-year-old cave, not only is there no sunlight, but the environment is also very harsh

Ever since humans began to look up at the stars, they have been curious about the vastness of the universe, and this is still the case today. With the help of various observation devices, modern humans can take a large number of photos of the deep space of the universe, which are updated almost every day.

Since gravity is actually a manifestation of gravity, and the magnitude of gravity is proportional to mass, for those objects with smaller masses, their own gravity is smaller