10,000-kilometer-long stationary feature may have been the biggest of its kind in solar system
With scorching temperatures and a mind-numbingly slow rotation (one Venus day lasts 243 Earth days), Venus was already a contender for weirdest planet in the solar system. Now add a giant arc-shaped structure to its list of oddities. The mysterious 10,000-kilometer-long structure was so big that it appeared to stretch between the planet’s poles. And it didn’t budge, even as winds in the planet’s upper atmosphere whipped along at a brisk 100 meters per second.
The C-shaped structure, which lasted at least four Earth days, could be a gravity wave, a large disturbance in the flow of a fluid or air, scientists say. It may have formed on Venus when winds in the planet’s lower atmosphere slammed into a mountain range and were pushed into the upper atmosphere, where it got stuck, a team of Japanese researchers report January 16 in Nature Geoscience.
Captured in images taken by JAXA