We are not worthy of exploring the space, because we will begin the star war, after we find aliens.
NASA and other countries are doing the exploration to the space and neighborhood planets. We have not found any similar planets so far, like earth.
The distance is space are beyond imagination. Only unit is 'Light Years'. So far, man has not invented anything to move at the speed of light or faster than light. But may be in the future, man will invent such thing and travel in the space to find aliens.
At least this time, let us not behave like our past explorers.
Explorers killed the citizens of the new land discovered. Red Indians in America, Aborigines in Australia, and many tribal were wiped out ruthlessly.
Now in the Space exploration, Man should not repeat the same violence. Let the aliens live with their culture and belief. Since we are able to reach them, we may be technically advanced in our weapons. So we have to make sure, we will not be eliminating aliens in the outer space if we come across any.
Aliens may also try to reach earth.If aliens reach the earth, God knows whether they let us exists or eliminate, God only knows.
Before exploring the space, we have to answer the following question.
Are we allowing fellow human beings to co-exists in our current time?
Many civilizations are being crushed slowly. Nation eats another nation, Religion kills another religion. Society eats another society. Language eats another language.
First, we have to stop the brutality here, in the earth. Developed countries are a threat to developing and under-developed countries. Military powers are trying to dominate countries without military power. No end for Big Fish eating Small fish.
If we are not able to stop the brutality here, we will repeat the same brutality in space too. If we will kill the alien at the first sight, we need not explore the space or look for signals from aliens.