Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

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.

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 ...

As the fastest-moving planet in our solar system, Mercury goes retrograde three to four times a year for about three weeks.

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

That is because both Venus and Mercury orbit closer to the sun than Earth, meaning they orbit much quicker than other planets, according to NASA. When was the last time 6 planets aligned?

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 ...