text: sun,kal mujhe ek science documentary mili thi, jismein black holes ke baare mein baatein ho rahi thi, samajh nahi aaya sab kuch kaise hota hai!wow, black holes ka concept toh kaafi interesting hai, par kya tumhe pata hai ki unka mass kitna zyada hota hai, aur unka gravity sab kuch kheench leti hai?