This is a war zone,our mission is to live. If we are a gambler, then our planet Earth is the right place for us. There are monsters out there in Universe and galaxy always try to destroy Earth. To understand the threat we must see that.
Asteroids are rocks object that orbit the sun.Also termed as minor planets.They have been found inside Earth's orbit to beyond Saturn's orbit.One theory suggests that they are the remains of a planet that was destroyed in a massive collision long ago.
Asteroids can put an end for human civilization. Every wonder why moon has marks, those are caused by collisions of asteroids. Ever wonder how dangerous and devastating it would be if any one of that comes into the line of orbit of earth.
One of another mystery in the galaxy is BLACK HOLE. Its region of space from which nothing can escape.It is called black hole because it absorbs all the light that hits it.
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