And what if nothing shows up at all? It would still be useful to know for sure how many planets there are, Rice said. “I think not even knowing the number of planets in our own solar system is ...

Every object in our Solar System is held in place by the Sun’s gravitational pull. The planets in the Solar System are all different but we can divide them into groups based on their common ...

We’re moving the other planets in our Solar System into our planetary neck of the woods. Would all the planets fit into this Goldilocks zone? What kinds of gravitational chaos would this cause? And ...

In fact, every planet—and every moon—in the solar system will be in the sky during ... “It will not get dark enough to see all our planetary neighbors,” said French.

So, to me, the most exciting thing about studying the solar system is not the planets themselves, but it's all the bits in between the planets. NARRATOR: These worlds could provide clues to our ...