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 ...

If you were to perfectly follow the steps in An Idiot's Guide to Making a Solar System, you should eventually find yourself ...

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

Jan. 15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System. This provides another piece of the puzzle to ...

The terrestrial planets are the four innermost planets in the solar system. None of the terrestrial planets have rings ... Earth’s Moon orbits the planet once every 27.3 days at an average distance of ...

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

NASA’s Juno mission to Jupiter’s moon Io has provided incredible data. A recent flyby revealed the most powerful volcanic event ever recorded on Io, the most volcanic world in our solar system.

Nasa's Juno spacecraft, orbiting Jupiter and its moons, has detected the most powerful volcanic activity in the Solar System.

When astronomers detected the first long-predicted gravitational waves in 2015, it opened a whole new window into the Universe.

Planetary scale model trails are letting cycling enthusiasts pedal their way through the cosmos. These trails are designed ...