Beyond Neptune lies the Kuiper Belt, a vast region of icy bodies offering crucial insights into the solar system’s formation.

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around, including Venus, Mars ...

The solar system is approximately 4.6 billion years old. Astronomers believe that roughly 100 million years into its existence, the planets first began to form in a rotating, flat cloud of gas ...

Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist.

If planet X exists, it is likely a gas giant similar to Neptune. NASA/Caltech/R. Hurt (IPAC), CC BY Our solar system is a particularly crowded place. Millions of objects move within it, whether they ...

planet ejection from early planet-planet scattering and stellar encounters and in the subsequent evolution of a multi-planet ...

The research team's simulations indicate a 1 in 100 chance that an interstellar visitor could produce the orbits we see today ...

Dark comets are comets that are so small, fast and/or chemically rare that they are difficult to see from Earth ...

New studies offer a clearer picture of how the outer solar system formed and evolved based on analyses of trans-Neptunian objects (TNOs) and centaurs. The findings reveal the distribution of ices in ...

Our solar system's phase space has capture points ... should be common and supports the evidence for a very large number of rogue planets that are free floating in interstellar space that perhaps ...