Preparations are underway to establish a residential colony in Mars while an American private space company ‘Space X’ has started preparation of rocket to send humans on Mars. The company is developing such rocket that can take 100 passengers and their luggage to the red planet. The purpose of this plan is to populate a human colony on Mars. This journey to Mars will complete from 6 to 9 months. The estimated cost of this rocket is $7 billion while it will be launched in 2018.