Which one among the following is not a luminous object?

Luminous objects are defined as entities that emit their own light, whereas non-luminous objects do not emit light but may reflect it [1]. Stars are primary examples of luminous objects because they generate energy through nuclear fusion. The Sun is a star and the primary source of light in our solar system [2]. Proxima Centauri and Alpha Centauri are also stars; Proxima Centauri is a red dwarf star and the closest star to the Sun. While Proxima Centauri has low luminosity and is not visible to the naked eye, it still generates its own light. In contrast, Jupiter is a gas giant planet. Like the Moon, planets are non-luminous objects because they do not produce their own light; instead, they are visible only by reflecting the light emitted by the Sun [2]. Therefore, Jupiter is the non-luminous object among the choices.

Sources

1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 11: Light: Shadows and Reflections > Light: Shadows and Refl ections 11 > p. 154
2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 2: The Solar System > 2.6. What's the Closest Star to the Sun? > p. 37