Science ❯ Astronomy ❯ Astrophysics

Interstellar Objects

3I/ATLAS Comets 3I/Atlas Comet Characteristics 31/ATLAS Cometary Composition A11pl3Z Comet 3I/ATLAS Comet 3I/Atlas 3I Atlas 3I/ATLAS Characteristics Alien Technology Formation and Evolution Planet Formation C/2025 N1 (3I/ATLAS) Comet Composition 3i/Atlas Comet Behavior Research Implications 3l/ATLAS Non-gravitational Acceleration Comet 2I/Borisov A11pI3Z Observation Techniques Comet Studies Detection Methods Characteristics of 3I/ATLAS Formation of Solar Systems Behavior of 3I/Atlas

3 ARTICLES

2mo ago

SETI Finds No Radio Signs From Interstellar Visitor 3I/ATLAS

New radio power limits along with James Webb’s first chemical fingerprint show the object best fits a natural comet and establish practical benchmarks for future interstellar-object follow-ups.

11 ARTICLES

5mo ago

JUICE Releases Best-Yet Image of Interstellar Comet 3I/ATLAS as Data Flow Begins

3 ARTICLES

6mo ago

SPHEREx Finds Interstellar 3I/ATLAS Has Become a Fully Active Comet After Perihelion

8 ARTICLES

7mo ago

No Alien Signals Detected From Interstellar Visitor 3I/ATLAS in Green Bank Scan

9 ARTICLES

7mo ago

Radio Search Finds No Signal From Interstellar Comet 3I/ATLAS as Hubble Images Twin Jets

10 ARTICLES

7mo ago

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

15 ARTICLES

7mo ago

New X-Ray and Gemini Images Refine View of Interstellar Comet 3I/ATLAS Before Dec. 19 Earth Flyby

16 ARTICLES

8mo ago

Hubble and ESA’s Juice Capture 3I/ATLAS With Active Coma and Twin Tails

22 ARTICLES

8mo ago

Radio Detection From 3I/ATLAS Bolsters Natural-Comet Explanation

27 ARTICLES

8mo ago

Radio Detection From 3I/ATLAS Points to Comet Activity as New Images Show Sprawling Jets

29 ARTICLES

8mo ago

New Images Show Interstellar Comet 3I/ATLAS Glowing Green With an Elusive Tail After Sun Swing

33 ARTICLES

9mo ago

China’s Tianwen-1 Releases Close Images of Interstellar Comet 3I/ATLAS as JPL Flags Non‑Gravitational Acceleration

21 ARTICLES

9mo ago

Interstellar Comet 3I/ATLAS Reappears to Earth View as Anomalies Drive Push for Faster Data Releases

14 ARTICLES

9mo ago

3I/ATLAS Brightens Unusually and Turns Blue Near the Sun as Data Indicate a Cosmic-Ray–Altered Crust

10 ARTICLES

9mo ago

Water Detected From Interstellar Visitor 3I/ATLAS as Perihelion Nears

15 ARTICLES

10mo ago

Interstellar Comet 3I/ATLAS Makes Closest Pass to Mars as Spacecraft Observe

14 ARTICLES

10mo ago

Interstellar Comet 3I/ATLAS Slips Behind the Sun as New Study Finds Unusual Polarization

13 ARTICLES

10mo ago

New Analysis Says Interstellar Comet 3I/ATLAS Is Far Larger Than First Estimated

3 ARTICLES

10mo ago

Interstellar Comet 3I/ATLAS Tied to New Planet 'Seeding' Hypothesis

8 ARTICLES

10mo ago

3I/ATLAS Shows Growing Tail and Rapid Brightening as Evidence Favors a Natural Comet

Interstellar Objects

SETI Finds No Radio Signs From Interstellar Visitor 3I/ATLAS

JUICE Releases Best-Yet Image of Interstellar Comet 3I/ATLAS as Data Flow Begins

SPHEREx Finds Interstellar 3I/ATLAS Has Become a Fully Active Comet After Perihelion

No Alien Signals Detected From Interstellar Visitor 3I/ATLAS in Green Bank Scan

Radio Search Finds No Signal From Interstellar Comet 3I/ATLAS as Hubble Images Twin Jets

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

New X-Ray and Gemini Images Refine View of Interstellar Comet 3I/ATLAS Before Dec. 19 Earth Flyby

Hubble and ESA’s Juice Capture 3I/ATLAS With Active Coma and Twin Tails

Radio Detection From 3I/ATLAS Bolsters Natural-Comet Explanation

Radio Detection From 3I/ATLAS Points to Comet Activity as New Images Show Sprawling Jets

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Interstellar Objects

New Images Show Interstellar Comet 3I/ATLAS Glowing Green With an Elusive Tail After Sun Swing

China’s Tianwen-1 Releases Close Images of Interstellar Comet 3I/ATLAS as JPL Flags Non‑Gravitational Acceleration

Interstellar Comet 3I/ATLAS Reappears to Earth View as Anomalies Drive Push for Faster Data Releases

3I/ATLAS Brightens Unusually and Turns Blue Near the Sun as Data Indicate a Cosmic-Ray–Altered Crust

Water Detected From Interstellar Visitor 3I/ATLAS as Perihelion Nears

Interstellar Comet 3I/ATLAS Makes Closest Pass to Mars as Spacecraft Observe

Interstellar Comet 3I/ATLAS Slips Behind the Sun as New Study Finds Unusual Polarization

New Analysis Says Interstellar Comet 3I/ATLAS Is Far Larger Than First Estimated

Interstellar Comet 3I/ATLAS Tied to New Planet 'Seeding' Hypothesis

3I/ATLAS Shows Growing Tail and Rapid Brightening as Evidence Favors a Natural Comet

Never miss stories about

Interstellar Objects