Retrograde mean motion resonances occur when orbiting bodies, moving in directions opposite to the dominant sense of motion, experience periodic gravitational interactions that can stabilise their ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Mercury retrograde is happening again. If you believe ...

Mercury is the closest planet to the Sun, whipping around our star every 88 days compared to Earth’s 365.25 days. Mercury will also be the first planet destroyed when the Sun expands on its way to ...