All articles
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Astronomy
X-ray Echoes of Dead Stars Nudge the Milky Way's Outer Arms Farther Out
Using dust-scattered X-ray light echoes from three gamma-ray bursts, astronomers re-measured two of the Milky Way's outer spiral arms and found them up to 10% farther from the galactic center than assumed.
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Stargazing
Aurora Alert: An X1.1 Flare and Back-to-Back CMEs Open a June 30-July 1 Storm Window
NOAA flagged G1-G2 storm conditions for June 30 into July 1 as a June 26 CME arrived and a slower June 27 CME chased behind, while AR4479 fired an X1.1 flare at 20:50 UTC - putting aurora within reach of northern-tier U.S. skies.
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Astronomy
A Super-Earth on the Cosmic Shoreline: UC Irvine Sharpens Up GJ 3378 b, 25 Light-Years Away
UC Irvine astronomers revised the mass and orbit of GJ 3378 b, placing the twice-Earth-size world firmly in its red dwarf's habitable zone just 25 light-years away — and on the shortlist for NASA's Habitable Worlds Observatory.
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Astronomy
Australia's MWA Bags Its First Millisecond Pulsar — and It's in an 833-Day Orbit
The Murchison Widefield Array found PSR J0125-5854, a 24-millisecond pulsar in a wide, near-circular 833-day binary — the MWA's first MSP and the first pulsar from the SMART survey's deep-pass search.
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Commercial
NASA Buys Four More Moon Landings: Astrobotic, Firefly and Intuitive Machines Split ~$590M in CLPS Orders
NASA awarded four CLPS task orders worth roughly $590M to Astrobotic, Firefly and Intuitive Machines to land four robotic missions on the Moon in late 2028, each carrying three payloads including the SCALPSS plume-imaging cameras.
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Missions
New Horizons Feels the Drag: Interstellar Atoms Are Braking the Solar Wind at 58 AU
SwRI's Heather Elliott and the New Horizons SWAP team report the solar wind at 58 AU is now 13-15% slower than at Earth, as interstellar atoms mass-load and brake it near the heliosphere's edge.
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Science & Discovery
The Radio Sky Is Brighter Than We Thought: A New SKA-Low Measurement Rewrites the Low-Frequency Map
A single SKALA4.1 antenna on an SKA-Low ground mesh in Western Australia measured the absolute brightness of the 60–350 MHz sky, and found the standard Global Sky Model runs 1.2 to 1.5 times too dim, deepening the puzzle of the excess radio background.
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NASA & Agencies
Asteroid Day 2026: As Hera Closes In on Dimorphos, Planetary Defense Gets Its Moment
On June 30, 2026, the UN-sanctioned Asteroid Day arrives at a hinge point: DART proved we can nudge an asteroid, and ESA's Hera spacecraft is due at Didymos-Dimorphos by year's end to inspect the wreckage.
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Science & Discovery
Could Giant Alien Mirrors Betray ET? A New Study Tests Whether Orbiting Megastructures Would Survive
A new study models whether huge, feather-light orbital mirrors could survive around exoplanets — and finds that radiation pressure dooms most configurations, making any long-lived mirror a sign of active engineering.
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Stargazing
The Blaze Star on the Brink: Why Sky-Watchers Are Still Waiting for T Coronae Borealis to Erupt
A recurrent nova 3,000 light-years away should brighten to naked-eye visibility any night now — but T Coronae Borealis blew past its statistically favored June 25 date and still sits at baseline. Here's why the watch continues.
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Stargazing
A Skyscraper-Sized 'Peanut' Buzzes Earth: Tracking Asteroid 1997 NC1's June 27 Flyby
Potentially hazardous asteroid (152637) 1997 NC1 — a slowly spinning, peanut-shaped ~1-km body — passed safely within 6.7 lunar distances on June 27, 2026, doubling as a backyard-telescope target and a planetary-defense radar opportunity.
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Missions
NASA Just Tested a 'Gas-Pump Nozzle' for Orbit — and It Could Be the Key to Mars
NASA's Marshall Space Flight Center and L3Harris have operationally tested a developmental cryocoupler — a quick-disconnect nozzle for transferring ultra-cold propellant between spacecraft and future orbital depots, a capability never demonstrated in orbit.
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