Exoplanet science is shifting from finding any detectable exoplanets we can to searching for those in their stars' habitable ...

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 ...

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

Scientists may have found a planet orbiting two brown dwarfs at a wild 90-degree tilt—something never seen before.

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

American scientists believe they have discovered a new dwarf planet at the edge of the solar system. Named OF201, this object ...

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 ...

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, ...

Less than 1% of this dwarf planet candidate's orbit is close enough to detect, which means astronomers are lucky to have ...