Science ❯ Astronomy ❯ Celestial Objects

Comets

3I/ATLAS Interstellar Comets 3I/Atlas C/2025 A6 (Lemmon) C/2023 A3 (Tsuchinshan-ATLAS) Observation Techniques Comet 12P/Pons-Brooks C/2025 A6 Lemmon Comet C/2023 A3 Star of Bethlehem Comet C/2025 A6 (Lemmon) Tsuchinshan-Atlas Comet Lemmon Comet 3I/ATLAS Comet Characteristics Dark Comets Halley's Comet Oumuamua Historical Comets 12P/Pons-Brooks C/2025 R2 (SWAN) Interstellar Objects Characteristics 31/ATLAS Swan and Lemmon Lemon Comet Comet A3 C/2023 A3 Tsuchinshan-ATLAS Comet Tsuchinshan-ATLAS Interestellar Comets C/2023 A3 Tsuchinshan-Atlas C/2025 V1 (Borisov) Comet SWAN Observations Oort Cloud 2I/Borisov Visibility Tsuchinshan-ATLAS Comet A6 Lemmon C/2025 K1 (Atlas) 96P/Machholz 24P/Shomassa Visibility Predictions C/2025 K1 ATLAS Discovery of 3I/ATLAS Discovery Visibility Techniques Observation Comet R2 SWAN Visibility of Comets Distance from Earth Comet Lemmon C/2023 H2 Other Notable Comets C/2025 A6 C/2025 A4 (Lemmon) C/2025 R2 Rock-Comet Comet C/2025 R2 (SWAN) Halleyscher Komet Halley Comet 2P/Encke Brightness Variations Color Changes Historical Significance Unusual Characteristics Comet 31/ATLAS Comet ATLAS (C/2025 K1) Behavior and Characteristics Kreutz Comets 3l/ATLAS 3I Atlas Comet 3I/Atlas Historical Perspectives Comet ATLAS Comet 24P/Schaumasse C/2025 R3 (PanSTARRS) 3I/ATLAS Comet Interestellar Objects Comet 13P/Olbers Discovery Programs 311P/Pan-STARRS Swift-Tuttle Comet 109P/Swift–Tuttle Long-Period Comets C/2024 S1 C/2023 A3 Tsuchinshan–Atlas Comet C/2023 A3 Tsuchinshan–ATLAS Comet 2023 A3 C/2023A3 Tsuchinshan-ATLAS C/2023 A3 (Tsuchinshan–ATLAS) C/2024 S1 ATLAS Solar System Comet 96P/Machholz C/2024 G3 (Atlas) Swift-Tuttle Comet Comet Nishimura 109P/Swift-Tuttle 3200 Phaethon Formation Comet Observations

NASA Resumes Search for Silent MAVEN Orbiter as Odds of Recovery Diminish

A December tracking fragment pointed to unexpected spin and a possible shift in the spacecraft’s orbit.

Interstellar Comet 3I/ATLAS Makes Closest Pass to Earth at About 168 Million Miles

Interstellar Comet 3I/ATLAS to Make Safe Closest Approach Friday at 167 Million Miles

Geminid Meteor Shower Peaks Dec. 13–14 With Dark Skies and Up to 150 Meteors an Hour

Interstellar Comet 3I/ATLAS Nears Dec. 19 Earth Flyby as Study Flags Strong Jupiter Perturbation

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

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

Comet Lemmon Stays Bright as Final Easy Viewing Window Closes

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

Comet Lemmon Makes Closest Approach Oct. 20–21 With Prime Viewing Under New Moon

Twin Green Comets Brighten For Best Views Under Next Week’s New Moon

Orionid Meteor Shower Set to Peak Under Moonless Skies Next Week

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

Comet Lemmon Brightens Ahead of Oct. 20–21 Peak, Now Near the Big Dipper

Twin Green Comets Enter Prime Viewing Week Before Closest Approaches

Orionid Meteor Shower Begins, With Peak Oct. 21–22 Under Moonless Skies

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

Interstellar Visitor 3I/ATLAS Shows Growing Tail as New Study Finds No Parent Star

Gemini Images Show 3I/ATLAS Growing a Tail, Underscoring Natural Comet Status