Do the giant rings of exoplanet J1407b rotate backward?

View larger. | Artist’s concept of the giant exoplanet J1407b and its immense ring system. A new study suggests the rings may be rotating around the planet backward. Image via Tiouraren/ Wikimedia Commons (CC BY-SA 4.0).

• J1407b is a giant exoplanet with a massive ring system. Scientists think the rings are 200 times larger than Saturn’s.
• The rings may be rotating backward, according to a new study from researchers in China.
• J1407b itself may be a rogue planet, drifting freely in space instead of orbiting a star.