Mars, a world now circled by two lumpy rocks, may once have hosted a colossal companion that dominated its sky. New work on the planet’s tides, topography and wobbly interior points to a “lost” ...

A recent study points to an exciting possibility: that Uranus's moon Miranda, located in the far reaches of our solar system, may harbor a hidden ocean and life.

Sky This Week is brought to you in part by Celestron. Friday, February 6The bright star Sirius dominates the southern sky ...

The first major planetary alignment of 2026 will take shape after sunset at the end of the month, when six planets line up ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

In March 2025, the International Astronomical Union recognised the discovery of a whopping 128 more moons orbiting around ...

A rare planetary parade will march across the sky on Saturday, Feb. 28, according to NASA. Venus, Mercury, Saturn, Jupiter, ...

The big astronomical event in February is a rare “planetary parade,” according to NASA. You’ll be able to see Mercury, Venus, ...