Sky This Week is brought to you in part by Celestron. Friday, March 6With no Moon in the early-evening sky, let's chase down ...

This all-inclusive refractor is best for observing planets and the moon, but still able to give skywatchers some glimpses of deep-sky objects.

A total lunar eclipse is the highlight of the month. For planetary action, Jupiter is well placed most of the night and there are many events involving its Galilean moons. Soon after sunset, ...

We all have a concept of reality. We know what is “fact” and what isn’t. However, the truth of the matter is that the ...

Pluto has not completed a single orbit since its 1930 discovery. With a 248-year journey around the Sun, the dwarf planet will finish its first full circuit in 2178.

We all have a concept of reality. We know what is “fact” and what isn’t. However, the truth of the matter is that the definition of “real” is a mere construct of the brain. If that didn’t blow your ...

Icy moons circling the outer planets may be far more dynamic—and explosive—than they appear. New research suggests that when ...

Earthlings aren't the only ones safe from a city-wrecking-size asteroid. Future lunar inhabitants won't have to worry about a ...

Jupiter’s icy moons may have been seeded with the chemical ingredients for life from the very beginning. An international ...

A new study proposes that a crash between Titan and another moon spawned Hyperion and, much later, destabilized Saturn’s ...

As the barrage airstrikes continue in the Middle East, we look at the military strength of Iran and the United States.

“Our findings suggest that Jupiter’s moons did not form as chemically pristine worlds,” Mousis said. “Instead, they may have accreted, or accumulated, a significant inventory of COMs at birth, ...