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Astronomers Discover a Possible Dwarf Planet Far Beyond Neptune, Where There Should Have Only Been Empty Space

  • Scientists have identified an object about 435 miles wide orbiting the sun beyond Neptune, which might qualify as a dwarf planet.
  • The object, named 2017 OF201, takes roughly 25,000 years to complete one orbit around the sun and is currently located about 90 astronomical units from the sun.
  • The discovery of 2017 OF201 has implications for hypotheses involving the potential existence of a ninth planet in our solar system, known as Planet X or Planet Nine.
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ReutersReuters
+5 Reposted by 5 other sources
Center

Possible new dwarf planet spotted near the edge of the solar system

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 travels on a highly elongated orbital path around the sun.

·United Kingdom
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Lean Left

We didn't know so far that the world is as big and as far away from the Sun as 2017 OF201. This discovery proves that the region beyond Neptune is far from being deserted, and its history will be exciting to explore.

·Paris, France
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Center

Researchers discover a possible dwarf planet at the edge of our solar system that could solve the mystery of the ninth planet.

·Berlin, Germany
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Lean Left

When will we fully understand the outer edge of the Solar System? It consists of eight known planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. In addition, there are a number of slightly smaller objects, called dwarf planets, one of the larger of which is Pluto. The four inner planets are rocky worlds (one of which is our Earth), and the outer four are gas and ice giants that are many times larger than Earth.

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Astronomy.com broke the news in United States on Thursday, May 29, 2025.
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