Space exploration

India’s Chandrayan-1 has achieved a major milestone in space science, discovery of water on the moon. There are no lakes or oceans on the moon. Only water molecules are found in moon's soil.It is a matter of great pride for all Indians. Presence of water on a celestial body other than earth is a clear indication that life in some form may exist in other planets in the universe. Water can remain in liquid form between 1 degree and 100 degree farenheight. If the planet is too hot, water will be vapourised, if it is too cold, water will be frozen into ice. U.S has launched a satellite in space to explore the planets in universe which supports life. There are billions of stars in our galaxy. Like our milky way, there are billions of galaxies in the universe. Even if it is proven that life supporting planets exist in universe, the distance between our earth and these planets would be so great that it will be humanly impossible to get in touch with civilisations living in such planets. Science has made tremendous progress in the last 50 years. Today, we have built very powerful telescopes which can detect even small planets circling a distant star. Yet, we are still far behind when it comes to inter planetary space travel. Inter planetary space travel is possible only if we have techinque through which we can travel at the speed of light. There is no physical object which can travel at the speed of light. Vastness of space can be gauged from the fact that some of the stars are thousands of light years away from earth which means even radio signals will take thousands of years to reach a distant star. Nearest star is one light year away from earth.Hypothetically, if human being could transform himself into energy and then travel space in energy form at the speed of light, it is possible to reach a life supporting planet circling the nearest star in one year. Will it be possible in future, it is difficult to say.