Name three factors that limit the brightness of the night sky.

1) The finiteness of the scale of the Universe; 2) redshift and decrease in the energy of photons from distant objects; 3) interstellar absorption of light.

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.