Science ❯Astronomy

Celestial Objects

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New Distant Sednoid ‘Ammonite’ Casts Doubt on Planet Nine Hypothesis

Its highly eccentric orbit, confirmed through archival and telescopic data, undermines evidence for a shepherding ninth planet.

Global Telescopes Sharpen View of Interstellar Comet 3I/ATLAS

Astronomers Launch Global Observations of Interstellar Comet 3I/ATLAS

Interstellar Comet 3I/ATLAS Unveils Glowing Coma and Tail

Moon Passes Within Half-Degree of Antares in Tonight’s Sky

Active Interstellar Comet 3I/ATLAS Set for Safe Solar System Passage

Interstellar Comet 3I/ATLAS Enters Inner Solar System

Experimental Fusion and Solar Sail Concepts Aim to Reach Sedna in Under a Decade

Rubin Observatory Unveils First Deep-Space Images From World’s Largest Camera

'City-Killer' Asteroid Now 4.3% Likely to Strike Moon, Threatening Satellite Networks

Co-Stars Recall Sushant Singh Rajput’s Cosmic Curiosity on Fifth Anniversary

Unusual 44-Minute Radio and X-Ray Pulses Detected Deep in Milky Way

Planetarium Show Reveals Spiral Structure in Oort Cloud

Mysterious 44-Minute Radio Transient Reveals Unprecedented X-ray Pulses

Mysterious Cosmic Transient Emits Radio and X-Ray Pulses Every 44 Minutes

Three Hidden Asteroids Co-Orbiting Venus Pose Unseen Threat to Earth

New Dwarf Planet 2017 OF201 Undermines Case for Planet Nine

NASA and ESA Confirm Safe Flybys of Two Large Asteroids in 2025

Scientists Unveil First Molecular Cloud Detected via Far-Ultraviolet Light

Hubble Telescope Marks 35 Years with Stunning New Cosmic Images