Earth might once have resembled a hot, steamy doughnut

The newly proposed planetary shape is called a synestia

synestia illustration

PUFFED UP  Early in its development, a rocky planet may turn into a synestia (illustrated), a spinning disk of vaporized rock that looks like a jelly-filled doughnut with a small, solid core (gray).

S. Lock/Harvard Univ.

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Planetary Science

From the Nature Index

Paid Content