Contrary to the terminology, Mercury and other planets do not ever move backward in space; they merely slow down, a ...

This year, Mercury is going to moonwalk three times in the sky. The planet of communication will be retrograde in the water signs of Pisces, Cancer, and Scorpio—in that exact order. As you may know, ...

Add Yahoo as a preferred source to see more of our stories on Google. The two planets that are in prime position for evening visibility this month are, ironically, the two planets on opposite ends of ...

Mercury's barren surface has led to the planet being labeled as "dead," but signs of geological activity say otherwise. Bright streaks known as "lineae," which can be seen on slopes across the planet, ...

A European-Japanese space mission will reach Mercury in 2026, carrying instruments designed to answer a question that has quietly unsettled planetary science for decades: how does a planet like this ...