Interstellar Comet 3I/ATLAS Sheds Unusually Large Particles, Prompts Avi Loeb's Anomaly Flags

Interstellar comet 3I/ATLAS is shedding particles significantly larger than typical cometary dust, a phenomenon highlighted as an anomaly by Harvard astrophysicist Avi Loeb. This behavior, along with others, fuels scientific debate about the object's nature.

• Interstellar comet 3I/ATLAS displayed an anti-tail jet with unusually large particles.
• Particles in the anti-tail jet are estimated to be 1 to 100 microns, larger than typical dust.
• Harvard Astrophysicist Avi Loeb has flagged this and other behaviors as anomalies for 3I/ATLAS.
• NASA's Parker Solar Probe and Europa Clipper observed 3I/ATLAS in late 2025.
• 3I/ATLAS is the third confirmed interstellar object to traverse our solar system.
• The exocomet made its closest approach to Earth on December 19, 2025.

Read the full story on Quick Digest.