Feature story: Physicists at Lawrence Livermore National Laboratory, led by Marius Millot, used the Omega Laser Facility at the University of Rochester to shock-compress diamond samples to about 1 terapascal — roughly three times Earth's core pressure — and temperatures hotter than the Sun's surface, recreating conditions found deep inside Neptune and Uranus. The results resolve a 20-year, ~1,000-degree disagreement between lab measurements and quantum simulations over diamond's actual melting point, confirming the simulations were right. The team also found diamond stays in its normal crystal structure right up until it melts — no intermediate phase — and confirmed solid diamond floats in liquid carbon, the same basic physics as ice floating on water. Published in Nature Physics, the corrected melting-point data could help triple energy gain in inertial confinement fusion reactors by allowing gentler, more efficient laser compression of diamond-shelled fuel capsules.
The rest of the news:
Roman Space Telescope's strange origin: three days out from its Sunday, August 30 launch (7:26am ET, Falcon Heavy), we trace how Roman's core optics began life inside the National Reconnaissance Office's canceled "Future Imagery Architecture" spy-satellite program, donated to NASA in 2012 after the program's spectacular 2005 collapse. The telescope is currently being mated to its Falcon Heavy at LC-39A, with a Launch Readiness Review Friday, August 28.
NOAA storm watch: the Space Weather Prediction Center has issued an official G2 (moderate) geomagnetic storm watch for Friday, August 28, following Tuesday's M6.9 solar flare — aurora chances improve for northern-tier US states, the UK and similar latitudes; minor storming isn't expected to reach much past Tasmania locally.
AI solar storm detection: NJIT researchers have built a Transformer-based AI model, EarlyDetect, that spots hidden precursor signals of solar active regions forming roughly 9.24 hours before they're visible — not yet ready for real-time forecasting, but a promising extension of the warning window.
SpaceX Starbase Louisiana: a $100 billion, five-complex, ten-pad second Starbase announced for Vermilion Parish, Louisiana, alongside Governor Jeff Landry — construction targeted for 2027, first launch aimed at 2029.
Tonight's Sky: a 96%-partial lunar eclipse peaks at 4:13 UTC / 12:13am ET August 28 — spectacular from the Americas, broad daylight in Sydney (~2:13pm AEST). Venus and Saturn remain the reliable local targets.
Links & sources:
ScienceDaily — Scientists crushed diamond beyond Neptune-like pressures — and solved a 20-year mystery
Gizmodo — Scientists Recreate the Melting "Diamond Rain" of Neptune and Uranus. It May Help Fusion Power
Space.com — From spy satellite to space telescope: the unlikely origins of NASA's Roman Space Telescope
Space.com — Nancy Grace Roman Telescope live updates: NASA readies Roman for launch
Watchers.news — M6.9 solar flare produces Earth-directed CME, G2 geomagnetic storm watch issued for August 28
Universe Today — AI Spots Hidden Solar Storm Signs 9 Hours Early
EurekAlert / NJIT — New AI model detects hidden signs of solar eruptions hours before they emerge
Space.com — Starbase Louisiana: SpaceX announces enormous $100 billion Starbase launch site
SpaceNews — SpaceX to develop Starship launch site in Louisiana
EarthSky — Partial lunar eclipse of the August 27-28, 2026
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