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

But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might still be nine if some astronomers are correct about an as-yet ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...

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

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

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

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

Starting up again Saturday, a sweeping view of our solar system will glow in the night sky. The planetary alignment, or a ...

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