Mercury is a planet that just doesn't make sense. It's incredibly small yet hosts a relatively massive core. Mercury is so strange that astronomers have not been able to explain its properties with ...

If things have felt a little too quiet in the cosmos, things are about to get very interesting. Though the main culprit of chaos will be Mars, as its retrograde in Gemini continues throughout the ...

How do you explore the interior of a planet without ever touching down on it? Start by watching the way the planet spins, then measure how your spacecraft orbits it — very, very carefully. This is ...

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Three to four times a year, the planet Mercury appears to travel backward across the sky. The journey during these periods when Mercury is in apparent retrograde motion is known as “Mercury retrograde ...

The Mercury retrograde begins in Sagittarius and shifts into Scorpio. In astrology, Mercury is associated with communication, ...

Skywatchers across the Northern Hemisphere have caught a fleeting glimpse of Mercury as it made one of its final visible appearances of the year. Appearing low on the southwestern horizon just after ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This article is more than 3 years old. New research ...