Science ❯ Astronomy

Comets

Interstellar Objects 3I/ATLAS Interstellar Comets Characteristics Halley's Comet Observation Discovery Swift-Tuttle Comet 109P/Swift-Tuttle Visibility

3I/ATLAS Reappears Brighter as NASA Faces Pressure Over Withheld Images

Fresh detections set up coordinated follow-up during a shutdown that has slowed data releases.

First Post-Perihelion Images Capture 3I/ATLAS After Sun Passage

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

New Study Flags Possible Taurid ‘Resonant Swarm’ Risk in 2032 and 2036

After Perihelion, Swift Spots Unexpected Water From Interstellar 3I/ATLAS

Interstellar Comet 3I/ATLAS Reaches Perihelion as Telescopes Await December Return

Interstellar Comet 3I/ATLAS Hits Perihelion as Global Observatories Intensify Monitoring

3I/ATLAS Nears Perihelion During Solar Conjunction as Global Campaign Gears Up

NASA and IAWN Activate Coordinated Tracking of Interstellar Comet 3I/ATLAS Ahead of Perihelion

3I/ATLAS Nears Perihelion as Agencies Coordinate Tracking and Spacecraft Tail-Sampling Opportunities

Weekend’s Last Best Look at Twin Green Comets Before Moonlight Takes Over

NASA Confirms Earth’s Temporary Quasi-Satellite as Interstellar Comet 3I/ATLAS Nears Perihelion

Comet Lemmon Enters Peak Viewing Window for Naked‑Eye Spectacle Oct. 25–31

Twin Comets Lemmon and SWAN Light Up Northern Skies as Brief Viewing Window Peaks

Europa Clipper May Skim 3I/ATLAS’s Ion Tail as Interstellar Comet Nears Perihelion

Orionids Peak Tonight Under Dark Skies

Orionid Meteor Shower Peaks Under New Moon Tonight

Orionids Peak Under New-Moon Skies Tonight

Two Long-Period Comets Enter Peak Viewing: SWAN Closest Now, Lemmon Tuesday