A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

Planetary alignment is when several planets gather closely on one side of the sun simultaneously, according to Starwalk.space. This is colloquially referred to as a “planetary parade,” or a “parade of ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune orbit most stars. Oddly, our sun lacks such a planet. That's been a source ...

If you’re on the Internet, you’ve likely seen an Instagram or TikTok claiming that on January 25, 2025, the eight planets in our solar system will perfectly align in the night sky. And if you’re on my ...