comet Archives

First Evidence for a Non-Gravitational Acceleration of 3I/ATLAS at Perihelion - Avi Loeb – Medium

3I/ATLAS Exhibits Non-Gravitational Acceleration Near Sun, Deepening Interstellar Mystery

New evidence from the PUNCH satellite confirms 3I/ATLAS exhibits non-gravitational acceleration near perihelion in October 2025. Learn why this comet-like behavior without a visible tail deepens the mystery of interstellar objects.

Interstellar comet 3I/ATLAS just made its closest pass of the sun. Discover where it’s going next - CNN

Interstellar Comet 3I/ATLAS Completes Sun Pass, Begins Decades-Long Journey Out of Solar System

Interstellar comet 3I/ATLAS (C/2019 Q4) completed its perihelion passage and is now on a hyperbolic path out of the solar system. Learn about its trajectory and scientific significance.

3I/ATLAS Rapidly Brightens and Gets Bluer than the Sun Near Perihelion - Avi Loeb – Medium

Interstellar Object 3I/ATLAS Rapidly Brightens and Turns ‘Bluer than the Sun’ Near Perihelion

New data shows interstellar object 3I/ATLAS rapidly brightened and became ‘bluer than the Sun’ near perihelion, confirming its cometary nature. Read the full analysis.

Interstellar object 3I/ATLAS is about to get very active — Space photo of the week - Live Science

Interstellar Object 3I/ATLAS Begins Cometary Activation Near Mars Orbit

The third confirmed interstellar object, 3I/ATLAS, is growing a tail as it approaches the inner solar system. Learn why this cometary activation is vital for science.

Green comet to fly over Calif., won't be seen again for 1,000 years - SFGATE

Rare Green Comet Makes Closest Pass Over California, Ending 1,000-Year Journey

A rare green comet made its closest pass over California, marking an event that won’t repeat for 1,000 years. Learn why it’s green and how to view long-period comets.

Mysterious Interstellar Object Has Sprouted a Tendril Reaching Toward the Sun - Futurism

Interstellar Comet 3I/ATLAS Develops Peculiar Solar Tendril

An interstellar comet, 3I/ATLAS, has developed a mysterious tendril pointing towards the Sun, perplexing astronomers. Learn about this unique celestial event.

Double comet alert! Comets Lemmon and SWAN will reach their brightest this week — here's how to spot them - Live Science

Rare Double Comet Sighting: Lemmon & SWAN Brighten 2025 Skies

Don’t miss the rare double comet alert! Comets Lemmon and SWAN reach peak brightness this week in 2025. Learn how to spot them with binoculars.

Interstellar Object 3I/ATLAS Has A Rare "Anti-Tail", New Observations Confirm - IFLScience

Interstellar Object 3I/ATLAS Reveals Rare ‘Anti-Tail’

New observations confirm interstellar object 3I/ATLAS has a rare ‘anti-tail.’ Discover what this means for understanding comets from beyond our solar system.