🚀 Space Pulse · 2026-08-14 22:01 UTC

SPACE PULSE

Friday, 14 August 2026 — Evening Edition

⚡ TL;DR

Europe's first total solar eclipse in over two decades swept Greenland, Iceland, Spain, and Portugal on August 12, dominating agency coverage from both NASA and ESA. A busy week closes with a classified USSF launch hours away, two conflicting JWST results on a habitable-zone world, and 60 fresh arXiv papers pushing the frontier.

🚀 LAUNCHES

UPCOMING — USSF-366 (CLASSIFIED, FALCON 9 BLOCK 5)

• SpaceX is go for a classified U.S. Space Force mission tonight, August 15 at 21:52 UTC; booster drop zones match a Starshield LEO constellation profile. ^[1]

UPCOMING — ZHUQUE-3 FLIGHT 2

• Chinese firm LandSpace attempts the second test launch of its ZQ-3 rocket on August 18 at 23:35 UTC; payload identities remain to be determined. ^[2]

UPCOMING — STARLINK GROUP 17-50 (FALCON 9 BLOCK 5)

• SpaceX is go to loft 24 more Starlink internet satellites on August 19 at 02:00 UTC. ^[3]

ON THE BOOKS — STARLINK GROUP 15-20 AND 15-22

• Two further Falcon 9 Starlink batches of 27 satellites each are tentatively set for August 22 and August 25, though both are listed as to-be-confirmed. ^{[4] [5]}

🔭 DISCOVERIES

TOTAL SOLAR ECLIPSE — EUROPE, AUGUST 12

• The Moon fully covered the Sun over Spain's San Millán de los Caballeros on August 12, 2026, the first European totality in more than 20 years; totality was also visible from Greenland and Iceland. ^{[6] [7]}
• NASA imagery shows the eclipse progression over a sunflower field; ESA notes millions of observers witnessed the corona emerge as day briefly became night. ^{[8] [7]}

JWST CONFLICTING HELIUM RESULTS AT LHS 1140 b

• One JWST NIRISS team reports a detection of metastable helium escaping from the atmosphere of habitable-zone super-Earth LHS 1140 b (1.7 Earth radii, 5.6 Earth masses). ^[9]
• A second independent team analyzing four NIRISS/SOSS transits of the same planet reports no helium detected, placing strict upper limits on atmospheric escape. ^[10]
• The disagreement makes LHS 1140 b one of the most actively contested exoplanet atmosphere targets currently under JWST scrutiny. ^{[9] [10]}

FERMI-LAT LARGE-SCALE GAMMA-RAY STRUCTURE IN SOUTHERN SKY

• Using 17 years of Fermi-LAT data, researchers identify and characterize a new large-scale diffuse gamma-ray structure in the Southern Galactic Hemisphere that is distinct from the Fermi bubbles.

MEERKAT DETECTS RADIO MEGAHALO AT GHZ FREQUENCY

• MeerKAT L-band (1.28 GHz) observations of galaxy cluster RXC J0528.9-3927 reveal faint extended emission beyond its central radio halo, the first radio megahalo detected at GHz rather than LOFAR frequencies.

MEERKAT FINDS 27 NEW ROTATING RADIO TRANSIENTS

• The commensal MeerTRAP single-pulse programme at MeerKAT reports 27 new Galactic rotating radio transients; 14 are localized to arcsecond precision via imaging.

FIRST GLOBULAR CLUSTER STELLAR STREAM BEYOND THE MILKY WAY

• Researchers report evidence of the first tidally stripped globular cluster stellar stream detected outside the Milky Way, offering a new probe of dark matter in ultra-diffuse galaxies.

NASA COFFIES AI TOOL FOR SOLAR STORM PREDICTION

• NASA's COFFIES project uses machine learning to predict which solar active regions will produce geomagnetic storms, a capability aimed at protecting future lunar and deep-space crews.

🛰️ MISSIONS

ISS — EXPEDITION 75 SPACEWALK PREPARATIONS

• The Expedition 75 crew spent Thursday and Friday reviewing procedures and checking suits for an August 18 spacewalk to remove and replace a high-speed space-to-ground antenna on the station's exterior.
• Crew science this week included Canadarm2 robotic arm maneuver studies, virtual-reality experiments, and space exercise physiology research.

CARRUTHERS GEOCORONA OBSERVATORY

• Researchers publish a numerical model simulating images from the GeoCoronal Imager aboard the Carruthers Geocorona Observatory, NASA's first mission dedicated to Earth's exosphere, operating from its L1 halo orbit since September 2025.

NASA SCIENTIFIC BALLOON CAMPAIGN — FORT SUMNER 2026

• Six balloon flights carrying science experiments, technology demonstrations, and student payloads are preparing to launch starting mid-August from the agency's Fort Sumner, New Mexico facility.

HUBBLE AND ROMAN COMPLEMENTARITY

• NASA publishes a formal comparison of Hubble and the upcoming Nancy Grace Roman Space Telescope, framing how the two will work together to broaden cosmic perspective.

JAXA MICHIBIKI NO. 7 (QZS-7) ON H3 FLIGHT 9

• JAXA's rescheduled launch of the seventh Quasi-Zenith Satellite System navigation satellite aboard H3 Flight 9 remains on the near-term manifest following a June postponement announcement.

☀️ SPACE WEATHER

GEOMAGNETIC K-INDEX 4 WARNING — ACTIVE CONDITIONS TODAY

• NOAA SWPC issued a K-index of 4 (minor-to-moderate, approaching G1 threshold) warning valid from 10:52 UTC to 23:59 UTC on August 14; onset conditions were confirmed at issuance.

TYPE II SOLAR RADIO BURST — CME SIGNATURE THIS MORNING

• A Type II radio emission alert was issued at 07:15 UTC August 14, with burst onset at 06:50 UTC and an estimated CME shock velocity of 671 km/s, consistent with an Earth-directed or near-directed coronal mass ejection.
• The combination of the Type II burst and the subsequent K-index 4 warning suggests a moderate solar wind enhancement is responsible for today's elevated geomagnetic activity.

📄 RESEARCH

LHS 1140 b ATMOSPHERIC ESCAPE DEBATE (TWO PAPERS)

• Two independent teams each analyzed four JWST NIRISS transits of habitable-zone world LHS 1140 b; one claims a helium detection implying active atmospheric escape, the other finds none, highlighting how challenging atmosphere characterization remains at this planet size. ^{[9] [10]}

JWST SPOTS DUSTY PROGENITOR BEFORE TYPE Ia-CSM SUPERNOVA 2026sqf

• Pre-explosion JWST imaging of NGC 3310 reveals an AGB-like dusty source at the site of SN 2026sqf, a rare Type Ia supernova interacting with a dense circumstellar medium, providing direct progenitor evidence for this poorly understood class.

MEERKAT CONFIRMS FIRST GHz RADIO MEGAHALO

• Previously known only from low-frequency LOFAR surveys, radio megahalos are now confirmed at 1.28 GHz by MeerKAT in cluster RXC J0528.9-3927, extending our understanding of diffuse synchrotron emission in massive galaxy clusters.

27 NEW ROTATING RADIO TRANSIENTS FROM MEERKAT/MEERKTRAP

• The MeerTRAP programme's haul of 27 new Galactic rotating radio transients substantially expands the known census of this enigmatic source class, with 14 objects now pinned to arcsecond positions.

GRAVITATIONAL INSTABILITY IN YOUNG PROTOSTELLAR DISCS

• New models with improved radiative cooling show that very young (sub-1 Myr) protostellar discs are likely massive enough to be gravitationally unstable, meaning planet formation via fragmentation could begin extremely early in a stellar system's life.

DESI LUMINOUS RED GALAXIES YIELD INDEPENDENT HUBBLE CONSTANT MEASUREMENTS

• Applying the cosmic chronometer method to nearly 3 million luminous red galaxies from DESI Data Release 1, researchers derive new direct H(z) measurements that independently test the universe's expansion rate without relying on the cosmic distance ladder.

📎 Sources

1. Falcon 9 Block 5 | USSF-366 — Launch Library 2
2. Zhuque-3 | Flight 2 — Launch Library 2
3. Falcon 9 Block 5 | Starlink Group 17-50 — Launch Library 2
4. Falcon 9 Block 5 | Starlink Group 15-20 — Launch Library 2
5. Falcon 9 Block 5 | Starlink Group 15-22 — Launch Library 2
6. Total Solar Eclipse in Sunflower Field — NASA News Releases
7. A look back at the 2026 total solar eclipse — ESA Top News
8. A Sunflower’s View of Totality — NASA News Releases
9. Strict Limits on Helium Absorption from LHS 1140 b from Four J… — arXiv astro-ph
10. No Helium Detected in LHS 1140 b from Four JWST NIRISS/SOSS Tr… — arXiv astro-ph

Curated from official sources — NASA/ESA/JAXA/ESO/NOAA/arXiv/Launch Library. Informational only.
Serial 20260814-22-v56 · 2026-08-14 22:01 UTC · pulse.uzylab.com