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🚀 Space Pulse · 2026-09-04 22:01 UTC

SPACE PULSE

Friday, 5 September 2026 — 22:00 UTC Edition

⚡ TL;DR

BepiColombo fired its main engine to begin Mercury orbit insertion on 3 September, the climax of an eight-year journey by ESA and JAXA — the defining moment of this edition.

The day runs hot: a fresh Type II radio burst at 698 km/s hit this evening, Roman is coasting to L2, and the LVK gravitational-wave catalogue keeps rewriting the record books.

🚀 LAUNCHES

ISRO GSLV MK II / GISAT-1A (EOS-05)

  • ISRO's GSLV Mk II was listed "Go for Launch" with GISAT-1A (EOS-05), a geostationary Earth-imaging satellite for continuous monitoring of the Indian subcontinent and rapid disaster response; window was 3 September 21:25 UTC. [1]

SpaceX Falcon 9 / SDA Tranche 1 Transport Layer A

  • SpaceX is targeting no earlier than 30 September to loft the next batch of U.S. Space Force Space Development Agency Proliferated Warfighter Space Architecture (PWSA) Tranche 1 transport satellites. [2]

Rocket Lab Electron / LOXSAT 1

  • Also targeting 30 September, Rocket Lab's Electron will carry Eta Space's LOXSAT 1 demonstration satellite on a Photon-LEO bus to test a full cryogenic oxygen fluid-management system in orbit under NASA's Tipping Point program. [3]

ULA Vulcan VC6L / Amazon Leo LV-01

  • United Launch Alliance has a Vulcan VC6L mission scheduled for 30 September carrying the first dedicated Amazon Project Kuiper broadband-constellation satellites to LEO. [4]

SpaceX Falcon 9 / O3b mPower 11-13

  • SpaceX is also slated for 30 September to deliver three Boeing-built SES O3b mPower high-throughput communications satellites to medium Earth orbit. [5]

🔭 DISCOVERIES

BepiColombo begins Mercury arrival

  • ESA and JAXA's BepiColombo took its first critical step toward Mercury orbit on 3 September, when the Mercury Transfer Module performed its key braking maneuver after eight years of inner Solar System transit; a full two-hour-plus replay was broadcast live. [6]

Nancy Grace Roman Space Telescope en route

  • NASA's Nancy Grace Roman Space Telescope, launched 30 August on a SpaceX Falcon Heavy from Kennedy Space Center LC-39A, is now three days into a three-month, million-mile cruise to its final orbit, from which it will probe dark energy and dark matter. [7] [8]

ESO finds Milky Way's fastest star orbiting Sgr A*

  • Using ESO's Very Large Telescope Interferometer, astronomers detected star S301 reaching 25,000 km/s around Sgr A*, making it the fastest known star in the galaxy and close enough to feel the black hole's spin directly. [9]

Hubble images superbubble N44

  • NASA's Hubble Space Telescope has released a new image of N44, a sprawling superbubble complex featuring hot gas cavities blown by massive stars. [10]

Curiosity finds unprecedented Martian surface features

  • After 14 years on Mars (sols 4988-4994), Curiosity encountered broad, shallow pits unlike anything seen in its mission history, with the Red Planet still delivering surprises to the MAHLI team.

🛰️ MISSIONS

BepiColombo Mercury Transfer Module separation

  • The Mercury Transfer Module completed the separation sequence on 3 September marking the formal start of Mercury approach operations for the joint ESA/JAXA orbiter pair. [6]

Roman Space Telescope health check

  • Roman is confirmed healthy on its outbound cruise, with mission teams at NASA monitoring systems en route to Sun-Earth L2. [7]

Progress 96 resupply to ISS

  • NASA is providing live coverage of the Roscosmos Progress 96 cargo launch and docking, carrying approximately three tonnes of food, fuel, and supplies to the International Space Station crew.

JAXA H3 / Michibiki No. 7 successfully launched

  • JAXA confirmed the successful launch of Michibiki No. 7 (QZS-7) aboard H3 Launch Vehicle flight No. 9 on 10-11 August, expanding Japan's Quasi-Zenith Satellite System constellation for precision positioning.

ESA Sentinel-3 climate monitoring

  • ESA highlighted a decade of Copernicus Sentinel-3 contributions to climate science, noting the forthcoming third satellite in the series will extend its multidisciplinary Earth-observation capabilities.

JUICE-UVS instrument paper published

  • A new arXiv paper formally describes the Ultraviolet Spectrograph aboard ESA's Jupiter Icy Moons Explorer (JUICE), a NASA-contributed instrument built at SwRI, designed to probe icy moon habitability and Jovian aurora.

☀️ SPACE WEATHER

ACTIVE — Type II and IV radio bursts detected today

  • NOAA SWPC issued a Type II radio emission alert at 20:06 UTC today (4 September), with the shock estimated at 698 km/s, indicating a solar energetic particle event in progress.
  • A Type IV radio emission alert followed at 20:07 UTC today, beginning at 19:24 UTC, confirming continued broad-spectrum post-flare radio activity from the same solar event.

High-speed CME Type II burst on 3 September

  • NOAA recorded a Type II emission on 3 September at 16:44 UTC with an estimated shock velocity of 1,359 km/s, one of the faster shocks of the current solar activity period.

Elevated energetic electron flux persisting

  • A NOAA continued alert issued 4 September at 12:08 UTC noted that the 2 MeV electron integral flux has exceeded 1,000 pfu since 31 August; the daily max reached 830 pfu by 04 September 12:00 UTC.

Earlier M8.1 flare summary (20 August, for context)

  • NOAA recorded an M8.1 X-ray flare on 20 August peaking at 11:42 UTC at location N04E85, rated R2 Moderate, accompanied by a Type II shock at 1,201 km/s — the strongest flare in the recent run.

📄 RESEARCH

LIGO-VIRGO-KAGRA O4 gravitational-wave catalogue published

  • The LVK collaboration released their flagship O4 catalogue, documenting what are now nearly routine compact-object merger detections — a transformation from the Nobel-level single event just a decade ago to a comprehensive statistical dataset.

Stellar flyby may explain Trans-Neptunian Object orbits

  • A new simulation shows that a 0.8 solar-mass star passing within 110 AU at 70 degrees inclination reproduces the tilted, eccentric orbits of Trans-Neptunian Objects better than any previous model, reviving the close-stellar-flyby hypothesis for our solar system's sculpting.

JWST detects Lyman-alpha emission from galaxy at redshift 9

  • Deep JWST NIRSpec observations of C3PO-8447 at z = 8.998 detected Lyman-alpha emission with a 1.5 percent escape fraction and a 210 km/s velocity offset, providing a rare direct window into the epoch of reionization at less than 600 million years after the Big Bang.

Sgr A* proper motion pinned in Gaia reference frame

  • The first proper motion and acceleration measurements of Sgr A*'s infrared counterpart tied to the Gaia-CRF3 inertial frame set strict upper limits on any intermediate-mass black hole companion orbiting within a few thousand AU of the galactic center.

Fermi GBM compiles 17 years of magnetar bursts

  • Fermi's Gamma-ray Burst Monitor catalogued over 1,000 bursts from soft gamma repeaters across 17 years of continuous operation, providing the deepest statistical picture yet of magnetar extreme-physics behavior.

Intermediate-mass black hole caught feeding in minor merger

  • Using 6.6 megaseconds of combined Chandra exposures, astronomers identified a luminous supersoft X-ray source in the secondary galaxy of a 10:1 mass-ratio merger at redshift 0.216, consistent with an actively accreting intermediate-mass black hole caught in the act.

That is your Space Pulse for 5 September 2026. Clear skies and steady signals.

📎 Sources

  1. GSLV Mk II | GISAT-1A (EOS-05) — Launch Library 2
  2. Falcon 9 Block 5 | SDA Tranche 1 Transport Layer A — Launch Library 2
  3. Electron | LOXSAT 1 — Launch Library 2
  4. Vulcan VC6L | Amazon Leo (LV-01) — Launch Library 2
  5. Falcon 9 Block 5 | O3b mPower 11-13 — Launch Library 2
  6. BepiColombo’s Mercury arrival begins - full replay — ESA Top News
  7. Igniting Roman’s Journey — NASA News Releases
  8. Igniting Roman’s Journey — NASA Science
  9. Milky Way's fastest star orbits our supermassive black hole so… — ESO
  10. NASA’s Hubble Spies Superbubble Scene — NASA News Releases

Curated from official sources — NASA/ESA/JAXA/ESO/NOAA/arXiv/Launch Library. Informational only.
Serial 20260904-22-v72 · 2026-09-04 22:01 UTC · pulse.uzylab.com

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