We may now know why some hot Jupiters have such narrow orbits
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The extremely short 10-day orbits of hot Jupiter can be explained by the fact that the planets are born under a high density of stars.
Hot Jupiters have long puzzled astrophysicists. As the name suggests, they are planets similar in size and appearance to Jupiter – but, unlike Jupiter, they are very close to their star, meaning they only take a few days to complete an orbit.
Andrew Winter from Heidelberg University and his colleagues used data from the European Space Agency’s Gaia mission …