See Comet Tails Flap In Solar Wind

Or, giant space sperm swim toward Planet Ova.

See Comet Tails Flap In Solar Wind

Last Thursday, NASA’s Solar Terrestrial Relations Observatory (STEREO) captured images of two comets passing through solar wind. At the center is Comet Encke, and emerging later is Comet ISON.

STEREO consists of two sun-orbiting observatories, one ahead of Earth and the other behind. On Thanksgiving day, Comet ISON will pass the sun’s equator.

NASA

Kelsey D. Atherton

Kelsey D. Athertonis a defense technology journalist based in Albuquerque, New Mexico. His work on drones, lethal AI, and nuclear weapons has appeared in Slate, The New York Times, Foreign Policy, and elsewhere.