Astronomers stay in space for about few months,they make many experiments and analyse and get details regarding the space.Ed Lu,who stayed for about seven months,tells the details regarding Asteroids.There are some incoming asteroids that may cause damage to the world.There was the asteroid that is believed to wipe out dinosaurs,66 million years ago.It is expected that an asteroid will come near the earth on February 15,it is called 2012 DA 14.It is essential to now regarding these celestial bodies.
