Asteroids
Asteroids are very hard to see in the night sky. They can not usually be seen without some type of magnification device. Asteroids are hard to see, but the best way to see them is by simply taking a picture of the night sky and see which one looks blurry. If it is, that means it is moving and more than likely it is a asteroid or a comet.
Comets can be seen in the sky with a large telescope. Very rarely can they be seen with the naked eye. Comets have a body and a tail that is very bright. They usually move very slowly and look like a comma. The most famous comet is "Halley" and appears only once every 50 years.