Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

And outside our solar system, even hotter planets exist. The hottest planet in our solar system isn't the one that's closest to the Sun. Hotspots ranked Start the day smarter ☀️ Funniest cap ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to ...

When I was a kid, there were nine planets. Now we know of thousands! But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might ...

Our solar system right now looks nothing like what it originally looked like," Pitts said. "Look at a solar system like this one, where the planets are in this nice synchronicity and look at a ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say. ABC News. Video. Live. Shows. Shop. Log In. Stream on.

The age of the solar system is precisely determined as 4.54 billion years old, with a 1% uncertainty, using radiometric dating of terrestrial rocks, lunar samples, and meteorites.

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to ...