New spacecraft data from Pioneer, Voyager and Juno show that Jupiter is slightly smaller and more flattened than earlier estimates, refining the planet’s measured size and shape.

Skygazers can usually spot two or three planets after sunset, according to NASA. Hangouts of four or five that can be glimpsed with the naked eye are less common and occur every few years. Last year ...

Skygazers across Texas and beyond can catch a glimpse of six planets arcing across the night sky this week in a so-called ...

Found in a 16th-century copy of an ancient astronomy treatise, the annotations suggest that the trailblazing scientist ...

Planetary systems such as our solar system take hundreds of millions of years to evolve. Since humanity has only existed for a sliver of that time, astronomers have only observed planetary systems at ...

The term “planet parade” is used as an informal way to refer to planets being able to be seen simultaneously al ...

Six planets will appear close together after sunset in a rare planetary parade. Here is how and when to see this beautiful ...

If you examine our solar system’s giant planets, you’ll notice right away that they’ve all got moons—a lot of moons. While ...

The planets are aligning. This Saturday is a rare chance to see several of our closest cosmic neighbors in a single sky. Six planets will assemble themselves for a spectacular “planetary parade” that ...

Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

On Feb. 28, stargazers will have to look towards the western horizon to see 2026’s only planetary parade.

The next asteroid won’t come with a warning siren. What happens after it’s discovered could determine everything.