An artistic rendition of our solar system, including the Sun and eight planets. vjanez/iStock via Getty Images. Christopher Palma, Penn State and Lucas Brefka, Penn State. Curious Kids is a series for ...

Our solar system once had nine planets, but things changed when Pluto lost its planetary status in 2006. Ever since, astronomers worldwide have hunted for signs that we might still have a ninth planet ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago.. Then the planets began to emerge, as the billions of particles ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. The ice line. Advertisement. Article continues below this ad.

Indeed, other planets, dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we experience on Earth, experts told Live Science ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago.

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 ...

Astronomers using the mighty James Webb Space Telescope have captured direct images of four planets in a star system 130 light years from Earth — an astonishingly eagle-eyed feat of cosmic ...

HR 8799 is a pretty young planetary system, only 30 million years old, compared to our 4.6 billion-year-old solar system. Its young planets, still radiating heat from their formation, emit intense ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been ...