Here’s how it works. Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but are unlike any in our own solar system. The two exoplanets ...

Carbon dioxide has been detected on a planet outside our solar system for the first time. The gas has been observed directly by the James Webb Space Telescope on four exoplanets, all belonging to ...

Sub-Neptune planets that are smaller than Neptune in size are the most common type of planet known to exist in the Milky Way, but they are absent from the solar system. They have atmospheres that ...

Farther out – about 9.3 trillion miles away – sits the Oort Cloud, which some refer to as the outermost boundary of the Solar System. This region is believed to hold countless icy objects that still ...

Or maybe you’ve got a solar system project due tomorrow and no idea where to start? Either way, these Free Solar System Worksheets (PDF) are here to save the day (and maybe your sanity). Perfect for ...

This diagram shows the approximate relative sizes of our solar system’s planets, moons and dwarf planets, Credit: Emily Lakdawalla / The Planetary Society Our solar system is a wondrous place.