Hot-Donut Earth? Planet May Once Have Taken on Odd ‘Synestia’ Form The structure of a planet, a planet with a disk and a synestia, all of the same mass. Credit: Simon Lock and Sarah Stewart Earth probably became a “synestia” for a brief period about 4.5 billion years ago, according to a new study. 最新の研究によれば、約45億年前、地球はおそらく短い間「シネスティア構造」になっていた。 brief period - 短期間。 That’s the term for a newly proposed
![地球が熱いドーナツ型?かつて地球は奇妙な「シネスティア」形状だったかも!? - ニュースな英語のホンヤクコンニャク](https://cdn-ak-scissors.b.st-hatena.com/image/square/54eb6b474485081354f4a41f309b8c4239a220d0/height=288;version=1;width=512/https%3A%2F%2Fcdn-ak.f.st-hatena.com%2Fimages%2Ffotolife%2Ft%2Ftakamints%2F20170526%2F20170526110746.png)