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It plays an unexpected role in planetary temperature, researchers found: While most research about the habitable zone has focused on a star’s brightness (as temperature dictates whether water on a planet could be liquid, ice or gas), new research is showing that this is an extremely simplified and naive picture. The true test for whether or not a planet could host life may, in fact, rest in the most boring of gases: nitrogen… The researchers behind the simulations in this new study found that nitrogen plays a huge role in determining the overall temperature of a planet — and, therefore, its habitability. What’s even more complicated: it’s not a simple relationship, more nitrogen doesn’t necessarily just make a planet warmer. Read More ›