One of the longest stellar dimming events ever observed was likely caused by the gigantic saucer-like rings of either an ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

These icy bodies orbit the sun just like the major planets, yet they follow their own rules, often traveling along elongated paths far beyond Neptune. Their distant homes in the Kuiper Belt and ...

As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.

In 2006, Pluto was officially reclassified as a dwarf planet. The decision came down to one controversial rule about clearing an orbital neighborhood. As astronomers discovered more objects beyond ...

Our solar system is much like a trail of microcosmic breadcrumbs: Follow the molecular bits as far back as they go, and you'll learn a thing or two about where many of our planets and other celestial ...

WASHINGTON (Reuters) -Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it ...

Spots were speculated to be everything from alien cities to geysers. — -- Scientists have finally cracked the mystery of the unexplained lights on the dwarf planet Ceres that were speculated to ...

Astronomers searching for the faintest glimmers of light beyond distant Pluto say they’ve discovered a new dwarf planet – and that this planetoid’s movements hint that an invisible giant planet ...