A nearly new moon and mostly clear skies will present near ideal viewing conditions for the planet parade through Feb. 28.

Today is a time for reflection and preparation as you align with your professional goals and priorities. Find daily ...

Two planets stand side by side as the evening twilight continues to delight and colorful stars shine in the sky this week.

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years.

On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

From afar, Pluto once seemed boring and dead. After all, the dwarf planet is only two-thirds the size of our moon and resides ...

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

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