How to define a planet
UCLA Professor proposes a new definition of planets with more specific criteria.
Exoplanets
Earth-like planets may be an inevitability
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…