The discovery of yet another exoplanet is no longer news. More than 4,000 planets around other stars have now been found since the detection of the first one in 1995. As astronomers long suspected, or at least hoped, it seems that planets are ubiquitous in stellar systems and there are probably more planets than stars in our galaxy. But a new discovery of a large planet orbiting the small star GJ3512 is worth noting. The paper, published in Science, challenges our understanding of how planets form – and further blurs the line between small, cool stars known as brown dwarfs…

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