Comet 3I/ATLAS closeup

Astronomy & Observing News

Interstellar Comet 3I/ATLAS Has Cold, Ancient Origins

The most recent interstellar visitor was crisscrossing our galaxy for some 10 to 12 billion years before it came near the Sun.

HIRISE captures Comet 3I/ATLAS

Astronomy & Observing News

Updates on Interstellar Comet 3I/ATLAS: NASA Images, Many Tails, and Non-gravitational Forces

Now that Comet 3I/ATLAS has emerged from the Sun's glare, its behavior is being monitored by every available observatory.

Comet K1 ATLAS on Nov. 18, 2025

Astronomy & Observing News

Comet K1/ATLAS Crumbles, Interstellar Comet 3I/ATLAS Delights

Watch an Oort Cloud comet disintegrate before your eyes. Meanwhile, interstellar intruder 3I/ATLAS is brighter than expected.

Comet 3I/ATLAS closeup

Explore the Night with Bob King

All Eyes on Interstellar Comet 3I/ATLAS

An alien comet will soon depart from the Sun's glare and enter the morning sky. It may be even brighter than expected, so get ready for the observing opportunity of a lifetime.

ExoMars orbiter image of Comet

Astronomy & Observing News

Mars Orbiters' Front-row Seats to the Interstellar Comet

Spacecraft orbiting the Red Planet will aim a suite of instruments at Comet 3I/ATLAS to capture details about this enigmatic object.

Comet 3I/ATLAS orbit

Astronomy & Observing News

Interstellar Comet 3I/ATLAS: What We Know Now

Observations have revealed the comet’s fuzzy coma, hinted at a weird tail, and suggested an ancient history. Plus, some missions might keep observing the interstellar comet when it ducks behind the Sun.