Astronomers have recently detected a rogue planet entering our solar system, marking a rare event that has sparked ...

The immensity of space makes it impossible for humans to discover every hiding place the universe holds. Its infinitude makes ...

(Image credit: alexandarilich/Getty Images) Our solar system has been around for 4.6 billion years. While that sounds like a long time, it's just a blip in the 13.8 billion-year story of the universe.

Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

– Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago.

Scientists have thought that our solar system's inner rocky planets — Mercury, Venus, Earth and Mars —formed first (around 4.566 billion years ago), while gas giants and icy bodies in the ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have ...

(CNN) — A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third ...

Interstellar comet 3I/ATLAS shines in the sharpest view yet captured by the Hubble Space Telescope, helping astronomers determine the object’s size.

It’s possible that this object was first ejected to the Oort cloud, the most distant region in our solar system, which is home to many comets, and then sent back,” Cheng adds.

Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside our Sun and planets around 4.5 billion years ago.