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An odd planet the size of Neptune, made mostly of hot, solid water, has been discovered orbiting a nearby star and offers evidence that other planets may be covered with oceans. Called GJ 436b, the planet orbits quickly around a cool, red star some 30 light-years away. The planet is hot because it is near its star and under high pressure because of its mass. The planet is also likely blanketed by hydrogen-- conditions hardly conducive to life. But if there is water, there could be water on other planets in other solar systems and thus life as we know it.