A celestial body that moves around the planets.
Explanation
In astronomy, a satellite is a celestial body that orbits a planet. Just as planets revolve around a star (the Sun), satellites revolve around planets. They are held in orbit by the gravitational pull of the planet they accompany.
Option Analysis
- A celestial body that has its own heat and light. is incorrect: A celestial body that possesses its own heat and light is defined as a star (e.g., the Sun). Satellites do not emit their own light; they reflect the light of the star.
- A celestial body that moves around the planets. is correct: A satellite is defined as a celestial body that moves around a planet. For example, the Moon is a natural satellite of the Earth.
- A pattern formed by a group of stars. is incorrect: A recognizable pattern formed by a group of stars is called a constellation (e.g., Ursa Major or Orion).
- A rock that burns upon entering Earth's atmosphere. is incorrect: A small rock or celestial debris that burns upon entering Earth's atmosphere due to friction is called a meteor (often referred to as a shooting star).
Key Takeaway: Satellites are celestial bodies that orbit planets. They are distinct from stars, which generate their own energy, and from constellations, which are fixed patterns of stars.