Dreams involving celestial imagery and constellations often symbolize guidance, aspirations, and a connection to the universe. The Christmas tree shape might represent celebration, hope, or the idea of connecting with something larger than yourself.

Sending the red yarn towards the brightest star signifies your desire to reach out, connect, or perhaps manifest a goal or wish. The fact that you could feel the pulse of the star in your finger suggests a strong connection to your aspirations or a realization of your potential.

The triangle that formed on your hand may symbolize stability or a solid foundation for your thoughts or intentions, as triangles often represent balance and harmony in dreams.

Feeling extremely cold and shaking could indicate a sense of vulnerability or fear as you reach for your dreams. It may also reflect anxiety about the unknown or the challenges that come with pursuing your ambitions.

Overall, this dream seems to express a powerful desire to connect with your aspirations while also highlighting the complexities and emotions that arise in this pursuit. Consider reflecting on what goals or dreams you are currently working toward and how they may be affecting you emotionally. Embracing both the excitement and the fear can be a part of the journey.