TED Talksのインスタグラム(ted) - 3月30日 05時06分

The Earth and the Moon have a pretty weird relationship. They’re actually twins — they have identical isotopes, meaning that they’re made up of the same materials. That’s unheard of as far as “space relations” go. No other planetary bodies have the same genetic relationship. So, what makes the Earth and the Moon so special? After conducting countless simulations, planetary scientist Sarah T. Stewart discovered a new type of astronomical object: a synestia (which is what you see in this clip). A synestia is made from planets; it’s what a planet becomes when the combination of heat and spin speed causes it to lose its spherical shape. Sarah theorizes that the Earth was once a synestia, and the Moon actually formed inside it. “The next time you look at the Moon, remember: the things you think you know may be the opportunity to discover something truly amazing,” she says. To learn more, watch her #TEDTalk at go.ted.com/spacetwins
Visualization courtesy of Sarah T. Stewart

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