2. Nobody knows how many stars are there in space
It is impossible to predict just how many stars are there in our universe. Right now, as per the scientists and astronomers, there is an estimate of 200 to 400 billion stars in the milky way itself. With this, there are billions of galaxies in our universe.
3. As early as 240B the Chinese began to document the appearance of Halley’s Comet
After 164BC there was a continuous recording of the comet each time it was visible. The next Halley’s comet will be seen from earth in the year 2061.