what is that Astral projection ?

Astral projection were the paranormal concept is also known as out of body experiences , a person can separate his consciousness from his physical body and travels outside, sometime person experience it in unconscious state also, even though there were no logical are scientific evidences for it , but this concept strongly believed in various religions all over the world , this concept were also similar too 'koodu vittu koodu paaithal'(soul traveling a body to another body) , astral (projection) traveler travels with comfortable dream body are soul body ,at the time they can fly , move through the solid items, even they can visit past and future but this are all just a believes ,