Sun and Moon
Together they are the most obvious influences Earth and with her we are living with. We only need to open the door or windows and we see and feel their powers. The Sun in a very direct way and the Moon a little more subtle but not less powerful. One more expressing, the other more "feeling", but it's the "feeling" that gives us further detail to what is obvious in the bright light of the day - remember, not everything that shines is necessarily "true" - in the meaning of glamour for example is beautiful and that got it's own right but we still know, that it's a mask....
The inner core and light - the lifeforce that wants to shine, radiate, express in it's full warm, creative and confident way... The Sun "IS", doesn't judge where the light shines, even if it's the darkest corner within us, we're even there touched by the warming light.
Greek Mythology: Helios was an ancient "Titan" (there were Gods/Goddesses before the Olympian times) and was driving his chariot from the east, rising and then in the west setting. The chariot is pulled by 4 horses.
Some Facts: Its diameter is about 1.39 million km (864,000 miles), or 109 times that of Earth. The Sun formed about 4.6 billion years ago. Even so to us our Sun appears to be gigantic and is the most luminous star visible, in fact our sun is pretty small in comparison but young as well, so we don't need to worry it to go supernova anytime soon ;-)
A very influential force that shows in our emotions. It maybe with lots of ups and downs, similar as the Luna's influence to the ocean and the plants. A cycle that repeats and repeats... In Astrology the Moon represents our inner, emotional needs and wants. It's comfortable in the darkness of night, with her silver light to shine the way but keeping us "inside" during the New Moon, when we can't see in the night, when we need to reflect and get answers for our very own future....
Greek Mythology: Selene (the Moon and sister of Helio) She got a silver-chariot, which was pulled by 2 horses. It's believed that she was madly in love with a half Human (son of Zeus) but he had fallen for Hera and asked Zeus for eternal sleep.
Some facts: The Moon is thought to be of about 4.51 billion years old. The Moon's average orbital distance is 384,402 km (238,856 mi), or 1.28 light-seconds. This is about thirty times the diameter of Earth. The Moon' s apparent size in the sky is almost the same as that of the Sun, since the star is about 400 times the lunar distance and diameter. Therefore, the Moon covers the Sun nearly precisely during a total solar eclipse. This matching of apparent visual size will not continue in the far future because the Moon's distance from Earth is gradually increasing. (Ref. Wikipedia)