Named for the god of war, Mars is our planet of will, energy, sexuality, and action, getting it done and getting it on, if you will. This week, that infernal majesty is going retrograde in the sign of ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A mineral trapped ...

Mercury retrograde gets a lot of hype for astrology aficionados. However, other planets also have retrograde motion and appear to move backward in the sky, too. Unlike Mercury, who backslides three to ...

From Dec. 6 through Feb. 23, Mars will enter retrograde motion, a period of about 10 weeks where the red planet will appear to move backward in the sky. Are you experiencing inner tension, heightened ...

NASA InSight lander snapped this selfie when its solar panels were still clean from dust. NASA’s InSight lander was a very different mission from the space agency’s famous wheeled Mars rovers. It ...

Mercury retrograde tends to get a lot of attention, but an even more impactful planetary backspin comes home for the holidays: Mars retrograde. The Red Planet officially reversed course on Dec. 6, and ...