<ul><li>The habitable zone is a range of distance from a star where conditions can support liquid water and potentially life on a planet's surface.</li><li>A recent study suggests that sulfur chemistry can be used to better define the inner border of a star's habitable zone.</li><li>The presence of atmospheric sulfur on an inner planet indicates the lack of surface oceans, and thus a narrower habitable zone.</li><li>However, high levels of ultraviolet light can break down sulfur compounds, making the sulfur test ineffective for some potentially habitable planets around red dwarf stars.</li></ul>

Can We Develop a More Accurate Habitable Zone Using Sulfur?

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