Planet Nine

Art depicting a hypothetical Planet Nine orbiting the Sun far beyond Neptune. Credit: NASA/JPL-Caltech / Robert Hurt
New analysis weakens — but doesn't kill — the case for Planet Nine (UPDATED)
Phil Plait
Feb 16, 2021
Trending on SYFY WIRE in Planet Nine
Tag: Bad Astronomy
Tag: Sun
Tag: binary star system
Tag: TESS
Tag: Trans Neptunian Objects

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Tag: Science
Tag: Bad Astronomy
Tag: exoplanet
Does Planet Nine exist? An alien world 300 light years away gives hope
Phil Plait
Dec 11, 2020
Artwork showing the super-Jupiter exoplanet HD 106906 b, orbiting over 100 billion km from its binary star host. A disk of planet-forming material surrounds the stars, indicating their young age. Credit: ESA/Hubble, M. Kornmesser
Tag: Science
Tag: Bad Astronomy
Tag: exoplanet
Tag: Science
Tag: Bad Astronomy
Tag: Sun
Was the Sun once part of a binary star system?
Phil Plait
Aug 25, 2020
Artwork depicting a second sun, a binary companion to the Sun that may have existed billions of years ago. Credit: M. Weiss
Tag: Science
Tag: Bad Astronomy
Tag: Sun
Tag: Science
Tag: Bad Astronomy
Tag: Planet Nine
Has the Sun captured dozens of asteroids from another star? Wellll…
Phil Plait
Apr 28, 2020
Artwork of a possible planet far, far away. Credit: Caltech/R. Hurt (IPAC)
Tag: Science
Tag: Bad Astronomy
Tag: Planet Nine
Tag: Science
Tag: Bad Astronomy
Tag: TESS
Could TESS have already seen Planet Nine?
Phil Plait
Nov 7, 2019
Artwork depicting Planet Nine, a theorized super-Earth orbiting the Sun several tens of billions of kilometers out. Observations of distant icy worlds imply this planet exists.
Tag: Science
Tag: Bad Astronomy
Tag: TESS
Tag: Science
Tag: Bad Astronomy
Tag: Planet Nine
Does Planet 9 Exist? <All signs (still) point to 'yes'>
Phil Plait
Feb 25, 2019
Artwork of a possible planet far, far away. Credit: Caltech/R. Hurt (IPAC)
Tag: Science
Tag: Bad Astronomy
Tag: Planet Nine
Tag: Science
Tag: Bad Astronomy
Tag: solar system
Meet your very, *very* distant solar system neighbor 2018 VG18
Phil Plait
Dec 18, 2018
Artwork depicting the extremely distant Kuiper Belt Object 2018 VG18. Credit: Roberto Molar Candanosa/Carnegie Institution for Science
Tag: Science
Tag: Bad Astronomy
Tag: solar system
Tag: Science
Tag: Bad Astronomy
Tag: Kuiper Belt
A newly discovered *extremely* distant icy world points to Planet 9
Phil Plait
Oct 2, 2018
Artwork depicting Planet Nine, a theorized super-Earth orbiting the Sun several tens of billions of kilometers out. Observations of distant icy worlds imply this planet exists.
Tag: Science
Tag: Bad Astronomy
Tag: Kuiper Belt
Tag: Science
Tag: Astronomy
Tag: space
Theoretical Planet Nine may be our solar system's Rogue One
Elizabeth Rayne
Jan 21, 2017
PlanetNineHeader_1024.jpg
Tag: Science
Tag: Astronomy
Tag: space