In Vedic astrology, the three most outer planets of Mars, Jupiter, and Saturn each cast a special aspect.
The word aspect is actually not very accurate. Like many Western words that try to convey Eastern concepts, the actual word is "drishti" which means "look" or "glance". For you see, in Vedic thinking, culture, and cosmology -- the planets are beings of intelligence that have been around since time immemorial.
Their movements and energies are not just relevant as "archetypes" - they represent real forces, eternal forces of the universe that transcend our 80 to 100-year lifespan. They connect us to that eternal, cosmic nature that we forget here on the flat Earth in which we live in our day to day lives.
Each of these planets is a body of light that can "see" in different directions. Saturn sees 3 signs in front and 10 signs in front. That is his special look. This look conveys the essence of his nature.
Saturn's aspects create trouble by shattering our illusions around the things he sees.
Sometimes this results in losing the thing entirely, other times we may just worry about it or have to put forth immense effort in order to maintain it.
This process of worry/effort/potential loss forces us to either deepen our commitment to it or let it go. This is why we tend to lose things when Saturn starts moving. He tends to push things to a point of seriousness where they either break or we have to work to improve them.
There's a great story about Saturn aspects, Saturn's "looks". Once, Lord Shiva and Parvati after having their first child Lord Ganesh held a party and invited all of the gods, Demi-Gods, and Planets to participate.
It was a beautiful celebration except one of the planets, Lord Saturn, seem to be kind of depressed and moping in the corner (go figure!) - in fact, he would not even look at the beautiful Ganesh.
Now, the planets are powerful -- but they are not as powerful as the gods, especially the mighty Lord Shiva and Mother Shakti, Parvati.
So, the great goddess upon seeing Lord Saturn unmoved by the festivities asked him why he was not participating.
Saturn replied, "Great Goddess, your child is beautiful, and I do not want my looks to ruin that beauty - a glance from me is not always welcome". "Nonsense!", declared Parvati, "I insist you look at my child immediately!". At which time Lord Saturn gaze gently at the beautiful Ganesh. No sooner did Saturn look at Ganesh, than did the beautiful boy's head fall off!! One look from Saturn decapitated Ganesh.
Lord Shiva went to find a suitable replacement head and was said to have found the head of one of Lord Indra's elephants - and so Ganesh was given this elephant head.
And so, it is said that the Saturn aspects can be more difficult than the Saturn conjunction.