A young astronomer on Earth admires the full moon. In what phase does the astronaut on the lunar surface see the Earth at this time?

Since in the full moon phase the surface of the Moon facing the Earth is fully illuminated by the Sun, at the same time the surface of the Earth facing the Moon is turned away from the Sun. Consequently, the astronaut sees the “new earth”, that is, the completely unlit Earth.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.