Question

Categorise the following into non-luminous(NL) and luminous(L) bodies: the Moon, the Sun, the Jupiter, the Pole star.

• A. NL: the Pole star, the Moon
  L: the Sun, the Jupiter
• B. NL: the Sun, the Pole star
  L: the Moon, the Jupiter
• C. NL: the Moon, the Jupiter
  L: the Sun, the Pole star
• D. NL: the Sun, the Moon
  L: the Pole star, the Jupiter

Answer 1

The correct option is C NL: the Moon, the Jupiter

L: the Sun, the Pole star
Self-luminous bodies emit their own light whereas non-luminous bodies do not emit their own light. All the stars are self-luminous while all the planets and their satellites are non-luminous, which appear to be lit up in the night sky due to the reflection of light from the Sun. Clearly, the Moon and Jupiter are non-luminous bodies whereas the Sun and the Pole star are self-luminous bodies.