To understand the possibility of a new planet, we need to know where our current ones came from. About 4.6 billion years ago, our Solar System formed from a swirling cloud of gas and dust.

How far away it is: 93 million miles (150 million km) ...

Our solar system was formed approximately 4.5 billion years ago, but humanity has been around for only a couple of thousand years. According to Neil Gaiman, the Earth and humanity were born on ...

Webb has directly imaged a young gas giant planet roughly the size of Saturn, our solar system's second-largest planet ...

This discovery marks a major breakthrough in astronomy and the ongoing search for planets outside our solar system.

On the other hand, our home planet has an eccentricity of only 0.017. “Earth’s orbit is fairly circular,” said Larry Wasserman, an astronomer at Lowell Observatory in Flagstaff, Ariz.

Astronomers celebrated the release of the first images from the Rubin Observatory — and registered hundreds of its first ...

An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse of icy bodies revolving around the sun.

Simulations Of Early Solar Systems Find Up To 40 Percent Chance That Planet Nine Exists Wide-orbit planets are fairly common according to the study, and there's a good chance we have one of our own.

An accidental discovery might change how we think about one of the most mysterious structures in our solar system. The Oort Cloud, a large expanse of icy bodies revolving around the sun at a ...

For comparison, the outermost planet in our solar system, Neptune, has an orbital distance from the sun of 30 astronomical units. Inside the disk gap, reminiscent of the outskirts of a hurricane ...