Yes they are big and fundamental in how we became and what were are today.
Below is a link to the 25 biggest turning points in earth’s history. Science is continually shining an almost celestial light to illuminate the path out of the darkness of our ignorance in understanding our existence. Exciting discoveries are being made. It is now thought that life on our planet began in deep space.
The cloud of gas and dust that eventually formed our sun and solar system was created over 5 billion years ago by the massive death throes and explosion of a massive star over 10-100 times the size of our sun in an event known as a supernova. This cloud contained all the elements we know of today and make us up.
So we are literally star born!
Chemical precursors to life have been found in comets and asteroids that were and still are around from 5 billion years ago at the birth of our solar system, from this cloud.
Some of these objects were very many at the beginning and their close orbits meant that they regularly collided with the forming earth. Some of these comets and meteorites seeded our planet with chemicals and materials which over millions of years evolved into multi cellar life, primitive bacteria and thenceforth to us billions of years later.
Please click below to link to an interesting BBC science article graphically portraying those key points & milestones in hour history