India will soon launch an advanced communications satellite, put into orbit for the first time by a cryogenic engine developed by its own scientists.GSLV-D3 carrying GSAT-4 satellite is scheduled for launch on April 15, 2010 

Cryogenic engines are rocket motors designed for fuels that have to be held at very low temperatures to be liquid. They would otherwise be gas. Officials say that only five countries in the world have this technology...