The places where astronomers work and make their observations are called observatories. Mostly, these places are located on the hill tops, away from the big cities and it is done with only one reason that is the environment including air is much

People began star-gazing thousands of years ago. One of the reasons they did so was to work out a calendar, so that they could organize their lives better. A calendar is a way of dividing up time so as to fit in with the seasons. By studying the