Science ❯ Astronomy ❯ Solar System

Outer Solar System

Kuiper Belt Trans-Neptunian Objects Comet Characteristics Moons Planet Nine Hypothesis Interstellar Objects Cometary Composition Jupiter Trojan Asteroids Dispersed Disk Planet Nine

4 ARTICLES

last mo.

New Horizons Wakes From 321‑Day Hibernation and Reports All Systems Healthy

Ground teams are downlinking health and stored science data as they test upgraded autonomy and prepare an Alice ultraviolet study of hydrogen at the heliosphere’s termination shock in about three weeks.

9 ARTICLES

3mo ago

Study Suggests Nereid Is Neptune’s Last Intact Original Moon

4 ARTICLES

3mo ago

Scientists Detect Ultra-Thin Atmosphere Around Tiny Kuiper Belt Object

5 ARTICLES

3mo ago

Most Distant Solar System Atmosphere Confirmed on Trans‑Neptunian Object 2002 XV93

10 ARTICLES

8mo ago

Sun-Facing Tail in Interstellar Comet 3I/ATLAS Reveals Wobbling Jets, Suggesting 15.5-Hour Rotation

5 ARTICLES

10mo ago

Lucy Spacecraft Delivers First Full High-Resolution Images of Asteroid Donaldjohanson

7 ARTICLES

last yr.

Webb Telescope Confirms First Extraterrestrial Water Ice in Young Star System

4 ARTICLES

last yr.

Astronomers Identify Potential Planet Nine Candidate from Archival Infrared Data

4 ARTICLES

last yr.

New Candidate for Planet Nine Challenges Original Hypothesis

10 ARTICLES

last yr.

New 'Kiss and Capture' Theory Explains Pluto and Charon's Formation

6 ARTICLES

last yr.

Scientists Identify Two Distinct Types of Newly Discovered 'Dark Comets'

7 ARTICLES

last yr.

Halloween Comet C/2024 S1 Faces Disintegration as It Nears the Sun

6 ARTICLES

2y ago

New Moons Discovered Orbiting Uranus and Neptune

6 ARTICLES

2y ago

NASA's New Horizons Reveals Kuiper Belt's Vast Extension

Outer Solar System

New Horizons Wakes From 321‑Day Hibernation and Reports All Systems Healthy

Study Suggests Nereid Is Neptune’s Last Intact Original Moon

Scientists Detect Ultra-Thin Atmosphere Around Tiny Kuiper Belt Object

Most Distant Solar System Atmosphere Confirmed on Trans‑Neptunian Object 2002 XV93

Sun-Facing Tail in Interstellar Comet 3I/ATLAS Reveals Wobbling Jets, Suggesting 15.5-Hour Rotation

Comet Lemmon Enters Peak Visibility After Close Pass to Earth

First Trans-Neptunian Object Found in 10:1 Neptune Resonance

Discovery of 'Ammonite' Narrows Search for Planet Nine

New Distant Sednoid ‘Ammonite’ Casts Doubt on Planet Nine Hypothesis

Active Interstellar Comet 3I/ATLAS Set for Safe Solar System Passage

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Outer Solar System

Lucy Spacecraft Delivers First Full High-Resolution Images of Asteroid Donaldjohanson

Webb Telescope Confirms First Extraterrestrial Water Ice in Young Star System

Astronomers Identify Potential Planet Nine Candidate from Archival Infrared Data

New Candidate for Planet Nine Challenges Original Hypothesis

New 'Kiss and Capture' Theory Explains Pluto and Charon's Formation

Scientists Identify Two Distinct Types of Newly Discovered 'Dark Comets'

Halloween Comet C/2024 S1 Faces Disintegration as It Nears the Sun

New Moons Discovered Orbiting Uranus and Neptune

NASA's New Horizons Reveals Kuiper Belt's Vast Extension

Never miss stories about

Outer Solar System