The status of Pluto not withstanding, our solar system has 8 planets, but one astronomer believes we used to have a ninth that was eaten by the sun.

For the first time since 2008, two new planets are being added to one of northern Maine's most famous — and scientifically accurate — roadside attractions. Dwarf planets Haumea and Makemake are the ...

Somewhere beyond Neptune, the Kuiper Belt is bent. Not by much, and not in a way any known planet can account for. A study published in Monthly Notices of the Royal Astronomical Society: Letters in ...

LILLE, Maine -- From left to right, Upper St. John River Organization Directors Tom Gerard and Steve Young, University of Maine at Presque Isle Emeritus Geology ...

New research on super-Earths and mini-Neptunes suggests more Earth-like planets may exist. The new study by Rice University researchers Sho Shibata and Andre Izidoro presents a compelling new model ...

Simulations suggest planetary orbits could destabilize within one billion years after the Sun begins losing mass, potentially ...

When 'Oumuamua traversed our solar system in 2017 it was the first confirmed Interstellar Object (ISO) to do so. Then in 2019, Comet 2l/Borisov did the same thing. These are the only two confirmed ...

One of the most notable properties of the giant planets in our solar system—Jupiter, Saturn, Uranus and Neptune—are the extreme winds observed around their equators. While some of these planets have ...