After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

If you’re trying to cheat death on Mercury, this is very promising, but the news gets even better. Mercury's Solar Day is ...

While all seven planets could appear in some form in parts of the U.S., not all of them will be visible to the naked eye.

“When compared to our solar system, each of the four planets are inside the distance of Mercury’s orbit,” Basant said. The ...

Mercury, the planet of communication and thought, will enter retrograde. Read what a tarot reader has to say for each zodiac ...

Mercury retrograde is, more or less, an optical illusion. Yet it holds great weight in astrology. Here's how it might affect your sign.

Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Mars, Jupiter and Saturn are frequently seen in the night sky. But because Venus and Mercury orbit closer to the sun than Earth, with smaller, faster orbits, it's more rare for them to make an ...

Mars, Jupiter and Saturn are frequently seen in the night sky. But because Venus and Mercury orbit closer to the sun than Earth, with smaller, faster orbits, it's more rare for them to make an ...