The modern space- age can be said to have begun with the launching of the Sputniks by Russia. Since then research and efforts in .space travel have assumed many dimensions. The landing of man on the moon, the launch of space shuttles, and stations etc. and the spectacular success of such spaceships as Mir, Viking, Voyager, Galileo, Ulysses, etc. reflect the strides taken in space by man. In the words of American President, Mr. Bush, “The infrastructure of space launch capability would be to the 21st century what the great highways and projects were to the 20th. Reliable space-launches would provide the ‘highway’ to solar system in the next century. We are well underway with unmanned explorations of the solar system.”
India’s entry into space-age is rather late, but it is said that better late than never. The beginning was made in 1975, when India launched its first scientific satellite Aryabhatta I into space, in collaboration with the U. S. S. R. As we did not have our own rocket-launcher, we were helped by the Russians. However, it gave the country space status. The second satellite, Bhaskara I, was launched on 7th June, 1979 from a Soviet commodore. This 444 kg experimental satellite contained instruments for carrying out remote sensing experiments. Then an improved version of Bhaskara I, Bhaskara II was launched on 20th November, 1981, with the help of a Soviet booster- rocket. Rohini was the first Indian satellite to be launched from the Indian soil, using the indigenous SLV-3 vehicle on July 18 1980. The launch rocket took 12 minutes to put Rohini in its orbit round the earth. Rohini made a perfect take- off from Sriharikota in Andhra Pradesh. With this India became the sixth country in the world to possess satellite launching capability. The other