Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
Answer:
2
Explanation:
when the soil in not fertile enough is hard to plant the vegetables and even If we do plant the vegetables on an infertile soil the vegetation could grow poorly
Iron was able to show previous orentations of earth's magnetic field
