قمر زمین می تواند تنها در 5 ساعت پس از برخورد غول پیکر شکل گرفته باشد

Earth's moon could have formed in just 5 hours after giant impact

One day in history about 4.5 billion years ago was a dramatic one for Earth, potentially giving our planet an instant moon and an almighty headache all in one go.