Prelude

There are many galaxies in the universe. The galaxies have innumerous stars that again have their own planet systems. A galaxy that is a cluster of stars, circles around their dark star in the center, called a black hole. Its gravitation is so powerful that even the light can not break free. It holds all its stars in orbits, waltzing in their endless harmony. There are also objects in between the stars that can not quite be characterized.

The Milky Way is such a galaxy with spiral arms of stars that rotate the core. One of its stars, at the border of that galaxy, sails a little faster than the rest. Periodically that star passes the content of the galaxy’s spiral arms.

It was dark and quite as usual in that star’s Oort cloud . The objects sailed quietly in their orbits, merely strong enough to on hold their positions. In their cold loneliness, almost invisible to each other, they sailed away, only disrupted by some minor collisions with each other. But their gravity holds them together so they soon find back to their place.

The Oort cloud is the name of the ring of object beyond the star systems planets. It exists at a distance at more than 1000 A.U.. The objects  simply can be anything like gas, icebergs or rocks. The are dead cold.

Far from there, in the centre, the star shone. But it could not heat the objects in the Oort cloud, they did not get any warmth.