What happens in the universe in one second time?

 

     We know very well that the Sun contains enormous quantity of hydrogen atoms and when they combine helium is formed duly liberating enormous energy into the space. But it is surprising to note that the quantity of helium Sun makes in a second time is 606 million metric tonnes.

     So many stars are being born and so many are becoming supernovae. To know the facts 4800 stars are born every second and about 30 stars become supernovae in a second.

     It is also a well known fact that the universe is expanding. But at which rate it is expanding is not known to all. According to astronomical facts the universe is expanding at the rate of 72 k m per megaparsec. (That means that a galaxy one megaparsec away will be moving away from us at a speed of 72 k m per second).

     Our galaxy is known as Milky Way. There is another galaxy close to us and almost double the size of our galaxy. It is moving towards our galaxy and is likely to merge with our galaxy. It is only110 k m from edge to edge. That means the merging is almost started. Yet it takes several million years to complete merging. Since there is enormous distance between stars the merging may not result in collapse and hence there is no danger. Ultimately the two galaxies put together will become a single galaxy.