The acid yellow moon Io that orbits Jupiter may be less than 30% the size of Earth, but is considered the most volcanic body ...

In a celestial event known as a great alignment the five planets will be discernible with the naked eye, but to see Neptune ...

Venus, Jupiter, and Mars dominate the sky. Catch your last views of Saturn as early in the month, the Moon passes in front of ...

I pick out North America’s celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern ...

WASP-121b is like nothing in the solar system, raining liquid metal and being puffy like a marshmallow. The origins of these ...

The closest of the asteroids to us—estimated to be about the size of a car—is whizzing through space at 27,358 miles per hour ...

NASA’s Juno spacecraft has uncovered an immense volcanic hot spot on Jupiter’s moon Io, surpassing any previously recorded ...

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

NASA’s Juno mission found Io’s biggest volcanic eruption ever. The explosion was stronger than all Earth’s power plants ...

According to NASA, this is around the time when the planet is closest to Earth, making it appear bigger and brighter. Mars is ...