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The discovery challenges the Planet Nine hypothesis, which suggests a massive, unseen planet is influencing the orbits of distant TNOs. While most extreme TNOs show a clustered pattern that supports ...

Astronomers detected both X-ray and radio pulses from a single mysterious space object, known as ASKAP J1832-0911, every 44 ...

The Milky Way may merge with the Large Magellanic Cloud in 2 billion years, not Andromeda, contrary to previous findings.

OF201 spends only 1% of its orbital time close enough to us to be detectable. The presence of this single object suggests ...

OF201 is incredibly lightweight on a cosmic scale. Scientists estimate its mass is about 20,000 times less than Earth’s and ...

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

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 ...

A new study of the Gobi Wall in the Gobi highland desert of Mongolia reveals a multifunctional role beyond defense; data from ...

The TNO, which are described as minor planets that orbit the sun at a greater distance than Neptune, were found on the edge ...

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...

OF201, a possible dwarf planet with a 25,000-year orbit, challenging theories about Planet Nine and the solar system’s edge.