There are numberless stars in the universe.
Their number is greater then all the grains of sand on all the shores of the world. They are circling in the universe everywhere. Basically stars are burning balls of fire.Usually, each star travels lonely through the universe. The universe has immense distances. It has long stretches of time. The universe is frightening inits nature. Our earth is millionth millionth part of a grain of sand. There is a very big star in the universe called sun.
It is huge enough to contain millions and millions of our earth in it. Even then there would be enough space left in it.
The nature of universe is the mixture of hot and cold weather.
Beyond the milky way, there are those areas where.there is either immense cold or immense hot.
Only the areas in the narrow belts have the right temperature to sustain life in them...