2025's Top Space Discoveries: Interstellar Comets, Alien Clues & Cosmic Shifts

• Interstellar comet 3I/ATLAS, spotted by Chilean ATLAS, confirmed its hyperbolic trajectory and unique chemistry, moving at 36 miles/sec.
• JWST images revealed early supermassive black holes forming in dense gas clouds, challenging prior growth assumptions.
• DESI data showed dark energy weakening over 4.5 billion years, suggesting "phantom dark energy" and reshaping cosmology.
• Perseverance found organic molecules in Jezero Crater, hinting at ancient Martian life; JWST detected dimethyl sulfide on K2-18b.
• Vera C. Rubin Observatory achieved first light, capturing stunning images and beginning a 10-year Legacy Survey of Space and Time.

Why It Matters: 2025 brought groundbreaking space discoveries, from interstellar visitors to potential alien life and new cosmic physics.