1) During a lunar eclipse, the location of objects looks like the Sun, Earth, Moon. At the same time, the Moon is always in the full moon phase, which means that it is always visible one day before the lunar eclipse.
2) During a solar eclipse, the Moon location of objects looks like – the Sun, the Moon Earth. At the same time, the Moon is always in the new moon phase, which means that a day before the solar eclipse it cannot be seen (facing the dark side, the bright Sun shines)
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.