The Aries Sun squares Pluto in Capricorn, at 17 degrees. New impulses challenge established power, or are driven by the need to establish power. The freedom to express desire, anger or initiative is intensified, and the result can be a relentless push forward, with hidden anxiety. Part of the challenge in a Pluto square is the fear that something will be taken away. This is a rawly assertive aspect: no compromise, no backing down.
This energy is part of the buildup to the April 7th New Moon.