The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

While people in each generation are often lumped together, an astrologer explains how to find what sets you apart.

Despite the heady atmosphere, passion and pleasure are in the air. Venus moves into hot-as-hell Aries on February 4—the same day that Jupiter stations direct in Gemini. Many love (and lust) stories ...

Look about an hour before sunrise on Feb. 1 and find Venus, bright but very low, in the southeast, with much dimmer Mercury to its lower left. Far to Venus’s upper right shines Saturn, and ...

If you draw a line through the barycenter to connect ... according to the Royal Greenwich Observatory. Dwarf planet Pluto, on the other hand, has a fairly squashed orbit. Mercury, the closest ...

Black and white sketch of the school astronomy banner Planets ... Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto. Isolated space objects Vector illustration with planet Neptune ...

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical Union (IAU) redefined what constitutes a planet, leading to Pluto’s ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to the bottom of whether Pluto is a planet, I tracked down planetary scientist ...