Which theory describes the origin of the universe? By Ahmed Akber 🌐 Source Astronomy Knowledge Base ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 A. Nebular Hypothesis B. Steady State C. Big Bang Theory D. Geocentric Check Answer 💡 Explanation: The Big Bang Theory is the prevailing cosmological model for the universe's beginning. 📚 Topics: Astronomy Science 🎯 Exams: CSS GEN NTS PMS