The universe is about….. Billion year old

Options

A. 13.8
B. 10
C. 20
D. 25

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the estimated age of the universe in billions of years.

2. **Reviewing the Options**: The options provided are 13.8 billion years, 10 billion years, 20 billion years, and 25 billion years.

3. **Scientific Research**: Scientists have conducted extensive studies to determine the age of the universe. One of the key methods involves analyzing the oldest light in the universe, known as the Cosmic Microwave Background Radiation (CMBR).

4. **Big Bang Theory**: The Big Bang theory suggests that the universe began approximately 13.8 billion years ago. This is supported by the observation of the CMBR, which is the remnant radiation from the early universe.

5. **Conclusion**: Based on scientific evidence and research, the most accurate estimate for the age of the universe is 13.8 billion years.

6. **Final Answer**: Therefore, the correct answer is 13.8 billion years.

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