astronomy-space

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2026-03-21 · phys.org

The seven hour explosion nobody could explain

Gamma-ray bursts are the most violent explosions in the universe. In a fraction of a second, they can release more energy than the sun will emit across its entire 10-billion-year lifetime. Most are over before you've had time to register them, gone in seconds, minutes at most…

2025-03-08 · spaceweatherarchive.com

Unprecedented Starlink Reentries

Feb. 5, 2025 (Spaceweather.com): What goes up, must come down–which could be a problem when you’re launching thousands of satellites. Since 2018, SpaceX has placed more than 7,000 Starl…

What we’re observing is a giant uncontrolled experiment in atmospheric chemistry. The demise of just one Gen1 Starlink satellite produces about 30 kilograms (66 pounds) of aluminum oxide, a compound that eats away at the ozone layer.
2025-03-06 · theness.com

Where Are All the Dwarf Planets? - NeuroLogica Blog

In 2006 (yes, it was that long ago - yikes) the International Astronomical Union (IAU) officially adopted the definition of dwarf planet - they are large enough for their gravity to pull themselves into a sphere, they orbit the sun and not another larger body, but they don't…