For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

"Here we have a golden target" for comparison ... three times the size of Earth, but with densities closer to the gas giants in our own solar system. Pitts said most of the planets are smaller ...

Jupiter, roughly 562 million miles from Earth today, has nearly 100 moons. But Batygin and his collaborator Fred Adams' ...

In the early days of our solar system ... and the planets were barely formed, Jupiter wasn’t the gas giant we see today. In fact, today’s Jupiter would look like a midget in comparison.

may have even more planets around it. The six found so far are roughly two to three times the size of Earth, but with densities closer to the gas giants in our own solar system. Their orbits range ...

"Here we have a golden target" for comparison ... times the size of Earth, but with densities closer to the gas giants in our own solar system. Pitts said that most of the planets are smaller ...

The hypothesis suggested a larger, unseen Planet X lurks even further out on the edge of our solar system. Watch this ... away. For comparison, Pluto is only about 40 AU from us.

Without a firm lower limit on size or mass, we’re forced to say the solar system has hundreds of planets—maybe thousands ... but when you compare any two samples close together on that ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet ... scientists say The hidden candidate is likely the size of Neptune and is so far away that it could ...

“Here we have a golden target” for comparison ... planets. The six found so far are roughly two to three times the size of Earth, but with densities closer to the gas giants in our own solar ...