Hot-Donut Earth? Planet May Once Have Taken on Odd 'Synestia' Form
Tuesday, May 23, 2017 - 06:32
in Astronomy & Space
Earth probably became a "synestia" for a brief period about 4.5 billion years ago. That's the term for a newly proposed cosmic object: a huge, hot, donut-shaped mass of vaporized rock that results from the collision of two planet-size bodies.