Define exobiology.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Exobiology**: Exobiology, also known as astrobiology, is a scientific field that studies the possibility of life beyond Earth.

2. **Focus Areas**: The primary focus of exobiology includes the origin, early evolution, and distribution of life in the universe, particularly in environments outside of Earth.

3. **Scope of Study**: Exobiology explores various celestial bodies, such as other planets and moons within our solar system, and examines the potential for life in these locations.

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