Our Solar System is home to many unique planetary bodies, including protoplanets and dwarf planets. Here are the unique ...

Anyone who grew up learning that our solar system has nine planets probably remembers the moment Pluto got demoted. That ...

In 2006, Pluto was famously demoted from a planet to a dwarf planet. It remains the most famous dwarf planet today, but there are others in our solar system, including potentially hundreds that ...

Planets appear to be common around stars in our home galaxy, the Milky Way. Astronomers have found planets not just for stars like our sun, but also for smaller, cooler red dwarfs and other types of ...

Two decades ago, Pluto was reclassified as a dwarf planet, sparking an enduring debate. NASA Administrator Jared Isaacman says he wants to “make Pluto a planet again.” ...

Twenty years after Pluto became a dwarf planet, people are still fighting over its status. Experts explain why the debate feels so personal.

New observations reveal that the far-flung object 2014 UZ224 (informally known as DeeDee, for "Distant Dwarf") is about 395 miles (635 kilometers) wide — big enough to claim "dwarf planet" status.

Hello, this is Mu-san.Today, I'm talking about a planet that orbits in the opposite direction to its star's rotation.A small ...

A color-enhanced view of Ceres, the nearest dwarf planet to Earth, high­lights its Oc­ca­tor crater. Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA Pluto is the most famous dwarf planet, due in ...

“This is a remarkable planetary system because the planet is not simply tilted relative to its star — it is orbiting in the ...

When compiling my notes, I add icons to the celestial bodies and sensitive points used in horoscopes. Since I have added some new ones, I would like to delve into them starting with the dwarf planets.

A rare type of plutonium has been found in the crust below the deep sea, offering new clues as to how heavy metals form in star explosions and mergers. Strange hexagonal diamonds may have been ...