The Sun, one of Allah’s most extrodinary creations, Subhanallah (glorious is God). The following quote from the quran proves that the Sun creates it’s own light, whereas the moon reflects it and has several phases.
‘It is He who made the sun a shining light and the moon a derived light and determined for it phases - that you may know the number of years and account [of time]. Allah has not created this except in truth. He details the signs for a people who know’