Question

Why can't we see stars and planets in the sky while we're in a city, yet they're visible everywhere else?

Answer 1

Light Pollution:

1. Light pollution, also known as artificial light at night, is the inefficient use of artificial outdoor light which disturbs wildlife's normal routines and results in the buildup of carbon dioxide $\left({\mathrm{CO}}_2\right)$ in the atmosphere.
2. There are countless particles in the air due to pollution, which absorb the light from faraway stars and planets.
3. As a result, the starlight in cities is incredibly dim and nearly impossible to view.