text: kal mujhe ek documentary mili space exploration par,pata hai, woh black holes ke baare mein itna detail mein batati hai ki samajh hi nahi aata ki yeh sach hai ya kahani!haan, mujhe bhi black holes ka concept bahut intriguing lagta hai, lekin kabhi kabhi sochti hoon ki agar hum wahaan gaye toh kya hoga, kya hum wapas aa payenge?