Abstract
In the first part of the lecture origin and evolution of the universe and the observed large scale structure is described. This is followed by a description of the Giant Metrewave Radio Telescope (GMRT). GMRT has several outstanding astrophysical objectives, including detection of massive neutral hydrogen clouds which are expected to exist prior to the formation of stars and galaxies in the universe. Consisting of 30 fully steerable parabolic dishes of 45 m diameter each, GMRT will become the world's largest radio telescope operating in the frequency range of about 38–1430 MHz. GMRT is now in advanced stage of completion and will become fully operational by mid-1996. It will be a versatile instrument and will be able to study radio waves being emitted by planets and the Sun, a wide variety of radio sources in our galaxy, nearby galaxies and the very distant radio galaxies and quasars. The design efforts of GMRT have not only led to a break-through in the development of low-cost large diameter antennas but also led to design of state-of-art electronics systems, having the potential of wider applications in the country.
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