Science ❯ Astronomy

Earth Sciences

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Starcloud Plans Late-2026 Mission to Mine Bitcoin in Orbit

The startup cites the lower per-kilowatt cost of mining ASICs over GPUs as its case for moving compute off Earth.

NOAA Ups Aurora Outlook: Kp 5 Could Bring Northern Lights to 15 U.S. States Tonight

Iran Puts Three Homegrown Satellites Into Orbit on Russian Soyuz

EarthSky Names 2025’s Top Stories, Led by Interstellar Comet 3I/ATLAS

Winter Solstice 2025 Brings Year’s Shortest Day in Northern Hemisphere

Winter Solstice Arrives Sunday at 3:03 p.m. GMT, Marking Year’s Shortest Day

Winter Begins Dec. 21 at 10:03 a.m. ET as Midwest Braces for More Cold and Snow

Ancient Chinese Eclipse Reinterpreted After Qufu's True Location Identified, Refining Earth Rotation and Solar Activity Records

Columbia Sportswear Unveils Tongue‑in‑Cheek Challenge to Photograph Earth’s “Edge”

Second Red Halo in Two Years Over Italian Town Identified as Lightning-Driven ELVE

Rocket Lab Adds iQPS Launches, Sets Oct. 14 Liftoff for Synspective Mission

Record-Short Days Renew Debate Over First-Ever Negative Leap Second

Scientists Confirm August 5 as Shortest Day of 2025, Eye Negative Leap Second

July 9 Recorded Among Shortest Days as Earth’s Spin Continues to Accelerate

Earth's Spin Breaks Short-Day Records as Timekeepers Halt 2025 Leap Second

Earth Could Set Shortest Day Record in July or August 2025

Communities Across Europe Prepare for 2025 Summer Solstice With Bonfires and Stonehenge Gatherings

Flat Earthers Witness Antarctica’s 24-Hour Sun, Challenging Core Beliefs