Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't achieved gravitational dominance in its region, the International Astronomical ...

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 ...

Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

NASA and European scientists explain how they calculate the probability of the space rock 2024 YR4 impacting our planet, and why it’s not yet time to worry.

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 ...

If planets had social media accounts, the solar system would showcase a frenzy of unique personalities. Mercury tweets at ...

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

Since then, Jesus has not wept again despite humanity’s continuing misbehaviour since He left. Jesus has not wept since ...

Just as Sun, Moon, Mercury, Venus and Mars move through the signs of the zodiac as they orbit, so do the outer planets.