First, we know that myriad small bodies orbit the Sun between Mars and Jupiter. These objects are the asteroids that comprise the main belt. Astronomers estimate that 1.1 million to 1.9 million ...

Mars appears low in the western sky for an hour or two after sunset throughout July. Spotting it will be easier with ...

Exoplanet orbit shapes reveal distinct formation pathways for small and large planets. Small planets, similar in size to Mars, typically have nearly circular orbits, while larger planets, like ...

The majority of known asteroids orbit in the main belt between Mars and Jupiter. It is unlikely that the many bodies here were ever part of a single planet.