For a complete description of them, I would first go to the following verses of the Holy Qur'an: 55:56-58, 55:70-74, 37:48-49, 38:52, 56:22-24, 44:54, 52:20.
There are Ahadith on this subject, but I can't seem to access the site for that right now for some odd reason. Something to do with my connection.