Science ❯ Astronomy

Celestial Objects

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Interstellar Comet 3I/ATLAS Shows Extreme Heavy-Water Signal, Pointing to an Ultra‑Cold Origin

The chemical fingerprint points to birth in an ultra-cold, low-radiation region far from a Sun-like nursery.

Interstellar Comet 3I/ATLAS Shows Extreme Heavy-Water Enrichment, Study Finds

JWST Detects Methane From Interstellar Comet 3I/ATLAS

Brightening Comet Pan‑STARRS Enters Pre‑Dawn View for Northern Skywatchers

Rare Comet Pan‑STARRS Now Glows Before Dawn for a Short Northern Viewing Window

Hubble Confirms First-Ever Spin Reversal of Comet 41P

Astronomers Tie Distant Star’s Chaotic Fading to Evidence of a Planetary Collision

ALMA Reveals 3I/ATLAS Is Exceptionally Methanol‑Rich, Indicating a Heterogeneous Interstellar Comet

ALMA Maps Show Interstellar Comet 3I/ATLAS Is Exceptionally Methanol-Rich

Hubble–Euclid Team-Up Unveils Multiscale Portrait of the Cat’s Eye Nebula

New Simulations Show Gravitational Collapse Can Build Kuiper Belt 'Snowman' Worlds

Study Ties ASASSN-24fw’s 200-Day Fade to Ringed Brown Dwarf or Super-Jupiter

Hubble Unveils Clearest Image Yet of the Egg Nebula

TESS Reobserves Interstellar Comet 3I/ATLAS After Safe-Mode Gap

Snow Moon Peaks Sunday at 5:09 p.m. EST, With Rare Regulus Occultation to Follow

Giant Metal-Bearing Cloud Tied to Hidden Companion Explains Months-Long Dimming of Sun-Like Star

Webb NIRCam Reveals Helix Nebula’s Cometary Knots in Unprecedented Detail

Jan. 18 New Moon Opens Prime Stargazing Window as Crescent Returns This Week

Mars-Mass Iron Bar Discovered Inside the Ring Nebula by New WEAVE Spectrograph

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