planet nine

  • Did Sun have an early binary companion?

    New hypothesis talks of the Oort Cloud and Planet Nine.

    In the early days of the Solar System, the Sun may have had a companion star, scientists say, making it part of a bin...

    Astrophysics August 21, 2020
  • Is it Planet Nine or a massive disc?

    There’s another suggestion for what’s causing some unusual orbital architecture. Nick Carne reports.

    So, are those mystery orbits in outermost reaches of solar system caused by an unknown ninth planet? There’s another ...

    Space January 21, 2019
  • Top 10 science stories of 2016

    Remember gravitational waves? Or Google’s AlphaGo trouncing human Go champions? We know, it was a...

    Google / Getty ImagesAll systems Go! But what is it like to play against a computer?The artificial intelligence progr...

    Space December 20, 2016
  • Planet Nine takes shape

    The Solar System is huge – it extends way past Pluto into light-year territory. So if a planet or...

    A mysterious planet in the far reaches of the Solar System is probably 10 times as massive as Earth and aglow with in...

    Astronomy April 11, 2016
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