Seven things to know about the new planets discovered by NASA

The scientists have measured the approximate density of six of the planets in the system. They have further devised that more research is required to show if any of the planets in the system have water on their surface. It is very much likely that all seven planets have water, "the key to life as we know it, under the right atmospheric conditions, but the chances are highest with the three in the habitable zone," NASA said.