Here's why:
* Uranus is very faint: It is the seventh planet from the sun and much fainter than the inner planets like Mars or Venus. You wouldn't see it glowing in the night sky without a telescope.
* It reflects sunlight, not emits it: Uranus doesn't produce its own light. It reflects sunlight, similar to how the moon reflects sunlight. However, its atmosphere is composed of methane, which absorbs red light and reflects blue and green light, giving it its distinctive blue-green hue.
So, while Uranus does have a blue-green color due to its reflective properties, it doesn't have a distinct "glow" in the way some other objects might.