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Planet 9

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Astronomers Uncover Evidence Of A Huge Object Lurking Beyond NeptuneThe orbit of Planet 9.

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Astronomers Uncover Evidence Of A Huge Object Lurking Beyond NeptuneThe orbit of Planet 9.
space-iconSpace and Physics

Astronomers Uncover Evidence Of A Huge Object Lurking Beyond Neptune

clock-iconApril 29, 2026
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A Massive, Unseen Object May Lurk Deep Inside The Kuiper BeltArtists rendition of the Sun seen from the Kuiper Belt.

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A Massive, Unseen Object May Lurk Deep Inside The Kuiper BeltArtists rendition of the Sun seen from the Kuiper Belt.
space-iconAstronomy

A Massive, Unseen Object May Lurk Deep Inside The Kuiper Belt

clock-iconFebruary 24, 2026
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Forget Planet X! Beyond Neptune, There Might Be An Earth-Sized Planet YArtist impression of an icy world away from any stars.

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Forget Planet X! Beyond Neptune, There Might Be An Earth-Sized Planet YArtist impression of an icy world away from any stars.
space-iconAstronomy

Forget Planet X! Beyond Neptune, There Might Be An Earth-Sized Planet Y

clock-iconAugust 22, 2025
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"Something Extraordinary Occurred": A New 380-Kilometer World Has Been Found In Our Solar SystemNew trans-Neptunian object Ammonite spotted by telescope.

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"Something Extraordinary Occurred": A New 380-Kilometer World Has Been Found In Our Solar SystemNew trans-Neptunian object Ammonite spotted by telescope.
space-iconSpace and Physics

"Something Extraordinary Occurred": A New 380-Kilometer World Has Been Found In Our Solar System

clock-iconJuly 16, 2025
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Newest Member Of The Solar System Just Announced – And It’s In An Extreme OrbitA composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201.

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Newest Member Of The Solar System Just Announced – And It’s In An Extreme OrbitA composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201.
space-iconAstronomy

Newest Member Of The Solar System Just Announced – And It’s In An Extreme Orbit

clock-iconMay 22, 2025
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Astronomers Find Potential Candidate For Planet Nine In 40-Year-Old DataPlanet nine concept art.

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Astronomers Find Potential Candidate For Planet Nine In 40-Year-Old DataPlanet nine concept art.
space-iconAstronomy

Astronomers Find Potential Candidate For Planet Nine In 40-Year-Old Data

clock-iconApril 29, 2025
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A Close Encounter May Explain The Strange Orbits Of Objects Beyond NeptuneSimulation showing our Solar System being disturbed by another star.

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A Close Encounter May Explain The Strange Orbits Of Objects Beyond NeptuneSimulation showing our Solar System being disturbed by another star.
space-iconSpace and Physics

A Close Encounter May Explain The Strange Orbits Of Objects Beyond Neptune

clock-iconSeptember 10, 2024
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Cosmic Object Speeding At 1 Million Miles Per Hour Discovered By Amateur AstronomersThis artist's concept shows a hypothetical white dwarf, left, that has exploded as a supernova. The object at right is CWISE J1249, a star or brown dwarf ejected from this system as a result of the explosion.

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Cosmic Object Speeding At 1 Million Miles Per Hour Discovered By Amateur AstronomersThis artist's concept shows a hypothetical white dwarf, left, that has exploded as a supernova. The object at right is CWISE J1249, a star or brown dwarf ejected from this system as a result of the explosion.
space-iconAstronomy

Cosmic Object Speeding At 1 Million Miles Per Hour Discovered By Amateur Astronomers

clock-iconAugust 19, 2024
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Astronomers Find Evidence Of A Massive Object Beyond The Orbit Of NeptuneA map showing the proposed orbit of Planet 9.

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Astronomers Find Evidence Of A Massive Object Beyond The Orbit Of NeptuneA map showing the proposed orbit of Planet 9.
space-iconAstronomy

Astronomers Find Evidence Of A Massive Object Beyond The Orbit Of Neptune

clock-iconApril 22, 2024
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Astronomers Narrow Down Where "Planet Nine" Could Be HidingAn artist's impression of Planet Nine.

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Astronomers Narrow Down Where "Planet Nine" Could Be HidingAn artist's impression of Planet Nine.
space-iconSpace and Physics

Astronomers Narrow Down Where "Planet Nine" Could Be Hiding

clock-iconFebruary 19, 2024
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Counter Earth: The Belief There Is Another Earth On The Other Side Of The SunTwo Earths in space.

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Counter Earth: The Belief There Is Another Earth On The Other Side Of The SunTwo Earths in space.
space-iconSpace and Physics

Counter Earth: The Belief There Is Another Earth On The Other Side Of The Sun

clock-iconJuly 21, 2023
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Astronomer Finds New Way To Find Mysterious Planet 9, If It Exists At AllA drawing of an icy blue planet.

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Astronomer Finds New Way To Find Mysterious Planet 9, If It Exists At AllA drawing of an icy blue planet.
space-iconAstronomy

Astronomer Finds New Way To Find Mysterious Planet 9, If It Exists At All

clock-iconFebruary 14, 2023
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Astronomers Have Discovered A Mysterious New World At The Edge Of The Solar Systemarticle image

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Astronomers Have Discovered A Mysterious New World At The Edge Of The Solar Systemarticle image
space-iconSpace and Physics

Astronomers Have Discovered A Mysterious New World At The Edge Of The Solar System

clock-iconOctober 2, 2018
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This Is Your Chance To Help Scientists Discover Planet 9article image

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This Is Your Chance To Help Scientists Discover Planet 9article image
space-iconSpace and Physics

This Is Your Chance To Help Scientists Discover Planet 9

clock-iconFebruary 16, 2017

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Extreme New Objects Found At The Edge of The Solar Systemarticle image

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Extreme New Objects Found At The Edge of The Solar Systemarticle image
space-iconSpace and Physics

Extreme New Objects Found At The Edge of The Solar System

clock-iconAugust 30, 2016