Which ones reflect and emit light? Star, asteroid, sun, Polaris, meteor, earth, moon, comet, mars

Stars ... including the Sun and Polaris ... emit light.

Meteors also do, but only for a few seconds.

Everything else ... including asteroids, Earth, Moon, comets,

meteoroids, meteorites, Mars, and all other planets ... reflect

light if any happens to hit them, and remain pitch black otherwise.

The sun, Polaris and star reflects and emit light.