An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Scientists now think that a mysterious object massive enough to have gravitational interactions with the Solar System’s disk ...

Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida Tech graduate, she leaves with not only a dual degree in planetary science ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are ...

In the inner Solar System, it is second only to Earth for its amount of water. New analysis of Dawn’s data has revealed more regions rich in organic materials, which disfavor the idea that these ...