GET TO KNOW THEM

As a child we grow,all of us have been wanting to know the facts about galaxy ,space and so on .and this universe is quiet riddled with galaxies.our universe is 14 billion years old. Galaxies are composed of dust, gas and countless stars and which have less than a billion stars are considered small galaxies .Each of the galaxies would have 100-200 billion stars circling within,and the age of the oldest star in the galaxy is said to be about 13.2 billion years .
In fact all galaxies including ours is going outward at a speed which is getting a little faster every year .The speed of an arm of galaxy is about 140 miles a second but perhaps in a billion more years our galaxy would be travelling about 1000 miles per second.
When you look up[ at the night sky you see stars and almost every point of light that you see is one of the 100 billion stars floating with us within the milky way galaxy.The galaxy is moving like a Frisbee disc while it is spinning .
For the solar system to complete one orbit around the galaxy takes as many as 225 to 259 million years .This is referred as the galactic year .