Is there stars in the sky every night?

Many people regard all things seen in the night sky as stars. This, however, is inaccurate. Some of the lights above us are indeed stars, (as define bellow), however, others are planets or other large bodies of reflective light which exist within our universe. Our atmosphere is transparent, allowing us to gaze upon this gigantic balls of light while the sun makes it's rounds. Literally, stars are massive balls of plasma held together by gravity; our sun is a star. The sun holds together our solar system: it provides warmth and acts as a catalyst for the rest of the planets orbits. Without the sun there would be no object great enough in mass to lock the planets into gravitational rotation.