(i) The planet nearest to the Earth is 'Mars'.
(ii) Many countries had sent space shuttles towards Mars for various purposes.
(iii) Mars expeditions are very tough and nearly 50% of the expeditions failed.
(iv) Every Indian should feel proud, as scientist from ISRO have made an expedition towards mars, a success. In Nov, 2013 space shuttle was launched towards Mars and in Sept 2014, valuable information was gathered from Mars.