- A star is a kind of celestial object / celestial body
- A star produces light and heat
- Therefore, a star is a celestial object that produces light and heat

- A star is a celestial object that produces light and heat
- The sun is the star that is closest to earth
- Hence, the sun is the celestial object that produces light and heat and is closest to earth

Hence, the sun is the celestial object that produces light and heat and is closest to earth
[Question]A star is a celestial object that produces its own heat and light. Which of these celestial objects is the closest star to Earth?
[Context]- The sun is the star that is closest to earth 
- A star is a kind of celestial object / celestial body 
- A star produces light and heat