VICEのインスタグラム(vice) - 9月25日 00時08分
Imagine a world where a year passes more quickly than a single Earth day. That’s what’s shaking at LTT 9779b, a giant exoplanet whose existence and properties are currently inexplicable given its extreme proximity to its Sun-like star, which it orbits every 19 hours.
Located about 260 light years from Earth, LTT 9779b is the first known example of an Neptune-sized world with this type of “ultrashort” orbital period of less than a day, according to a study published on Monday in Nature Astronomy.
The strange world is also the sole member of an entirely new class of exoplanet called the “ultrahot Neptune.”
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