Earth-like planets may be an inevitability

A UCLA-led study provides insights into how water might be formed by planets across the galaxy Science + Technology A UCLA-led study provides insights into how water might be formed by planets across the galaxy UCLA scientists and colleagues challenge the theory that Earth's water came from asteroids and comets colliding with our planet. The scientists identified a process through which "homemade" water can be easily produced on planets throughout our galaxy. Our planet is often thought of as unique in the galaxy, with just the right conditions to support an atmosphere, liquid water and ultimately life. In fact, water is actually much more common in planets across the galaxy than anyone would have imagined just a few years ago. One of the challenges researchers face today is explaining exactly where that water came from. Even the water here on Earth is a bit of a mystery that has puzzled researchers. But a recent study led by UCLA scientists, together with colleagues at the Carnegie Institution for Science, provides new insights into how water is formed in planets across the galaxy and changes our perspective on how common planets like Earth might be.