Billions of years from now, the Sun will swell into a red giant, swallowing Mercury, Venus, and Earth. But that’s not the ...

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

Scientists have identified an object about 435 miles (700 kilometres) wide inhabiting the frigid outer reaches of our solar ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

A distant, icy world has just been added to our solar system’s official roster, and its strange orbit might challenge one of ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

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

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?