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Astronomers have identified a massive trans-Neptunian object designated 2017 OF201, orbiting far beyond Neptune at the cold outer edge of the solar system. The discovery, reported in September 2025, ...

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The size of the solar system is defined by the volume of space over which the sun's influence exceeds those of other nearby stars in the Milky Way galaxy. This influence derives from two fundamental ...

CAMBRIDGE, England–When planetary scientists announced on July 29 that they had discovered a new planet larger than Pluto, the news overshadowed the two other objects the group had also found. But all ...

Use left and right arrow keys to seek audio. Researchers have used the Subaru Telescope in Hawaii to peer out to edge of the Solar System known as the Kuiper Belt to discover any objects. 11 objects ...

A bright comet with large dust and gas trails as the comets orbit brings it close to the Sun. Illustration. The much-heralded Vera Rubin Observatory —- due to come online early next year in northern ...

A team, including an astronomer from the University of Hawaii Institute for Astronomy (IfA), have confirmed a planetoid that is almost four times farther from the Sun than Pluto, making it the most ...

You might think we know the solar system pretty well, but there's a lot more to our cosmic neighborhood than initially meets the eye (or telescope). Most of the good stuff, such as the planets, moons ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...