Think about this: the Moon moves through a different sign over 2 1/2 days, through all the signs in one month, so during one day it is possible for the Moon to make many different aspects. The Moon tells us much about our habits, moods, and the way we absorb information. Two people born the same day but at different times can have very different lives!! In a similar way the rising degree, or ascendant, changes every 4 minutes. The ascendant will be different if calculated from a different part of the earth also, even if the time is the same. And the ascendant indicates the physical self in a human chart. This ascendant degree can make hundreds of different "aspects" over the course of a day!!
Ah, yes, astrology is complex and each chart is as individual as you are. But for now, let's keep it simple.
If you wish to read and learn more about astrology, here's my recommended beginners reading list courtesy of Amazon.com. Or search the word "astrology" below.
for astrologyA full reading list is available at: these book list pages.