#12 Tres-4b - A Puffy Planet (1 photo)
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20 Strange Planets That Are Both Interesting And Terrifying
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Located 1,400 light-years away in the Hercules constellation, TrES-4b is one of the largest exoplanets ever discovered so far (next to WASP-17b, WASP-12b, CT Chamaeleontis b and GQ Lupi b). Though it is over 1.7 times the size of Jupiter, it has an extremely low density and is categorized as a ‘puffy’ planet. The planet’s density is about the same as cork, which came as quite a shock. Astronomers attribute this to the extreme heat of 2300 °F (1260 °C) due to its proximity to the star. At only 4.5 million miles (7.2 million kilometers) away from its sun, TrES-4b is able to complete an orbit in three Earth days. This made TrES-4b both the largest known planet and the planet with the lowest known density at the time of its discovery.
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