🚀 Space Pulse · 2026-07-22 22:01 UTC

SPACE PULSE

Wednesday, July 23, 2026 — Edition 22 July 2026 22:00 UTC

⚡ TL;DR

NASA's Juno has delivered the first-ever subsurface temperature map of Io, revealing shallow internal heating on the solar system's most volcanic moon — the day's standout scientific result.

A G1 geomagnetic storm watch is in effect for July 24, two Chinese rockets are cleared for imminent launch, and the Nancy Grace Roman Space Telescope is confirmed for an Aug. 30 liftoff.

🚀 LAUNCHES

LONG MARCH 3B/E UNKNOWN PAYLOAD

• China Aerospace Science and Technology Corporation has a Long March 3B/E cleared "Go for Launch" targeting July 23 at 12:00 UTC — payload details undisclosed. ^[1]

LONG MARCH 7A UNKNOWN PAYLOAD

• A second CASC mission, Long March 7A, is also "Go for Launch" and targets July 29 at 11:50 UTC; payload remains classified. ^[2]

SOYUZ 2.1B / GLONASS-K1 No. 19

• Russian Space Forces plan a Soyuz 2.1b/Fregat launch of the third-generation GLONASS-K1 navigation satellite (No. 19) no earlier than July 31; this generation improves accuracy and power efficiency over prior GLONASS designs. ^[3]

ROCKET LAB ELECTRON / LOXSAT 1

• Rocket Lab is targeting no earlier than July 31 for Eta Space's LOXSAT 1, a NASA Tipping Point-sponsored demo of a cryogenic oxygen fluid-management system flying on a Photon-LEO bus. ^[4]

LONG MARCH 8A UNKNOWN PAYLOAD

• CASC has a Long March 8A mission tentatively scheduled for August 4 at 11:00 UTC; details remain to be confirmed. ^[5]

NANCY GRACE ROMAN SPACE TELESCOPE

• NASA has confirmed the Roman Space Telescope will launch from Kennedy Space Center on August 30 and will hold a public media briefing July 29 at 18:00 UTC to preview the mission. ^[6]

🔭 DISCOVERIES

IO SUBSURFACE HEAT MAP (JUNO)

• NASA's Juno has produced the first measurements of temperature below Io's surface using the Microwave Radiometer (MWR), revealing significant heating in the shallow subsurface of the most volcanically active world in the solar system. ^{[7] [8]}
• Data were gathered during two close flybys; the MWR's lowest-frequency channels probed depths infrared instruments cannot reach, showing heat concentrated in localized near-surface regions rather than being globally uniform. ^{[8] [9]}

ESO VLT EXOMOON CANDIDATE IN CD-35 2722

• ESO's Very Large Telescope has found evidence for a moon-sized object in the CD-35 2722 system that orbits not a planet but directly orbits a brown dwarf, raising fundamental questions about what the word "moon" should mean. ^[10]

JWST TYPE Ia SUPERNOVA IMPOSTOR AT z~4.3

• A transient (beacon_1420-5253_4770) originally flagged as a z~14 galaxy candidate is now identified as a likely Type Ia supernova at z~4.3, illustrating how luminous supernovae can masquerade as early-universe galaxy discoveries in JWST surveys.

MOLECULAR GAS HIDDEN IN ARCHIVAL DATA FOR TWO DECADES

• Using ESO's VLT/X-shooter, astronomers found a strong molecular hydrogen (H2) absorber at redshift 4.1 along the line of sight to quasar SDSS J080023.02+305101.22 (z=4.7) — the system had gone unnoticed in archival data for roughly 20 years.

NISAR OPENS PUBLIC DATA ACCESS

• As of July 20, L-band and S-band radar data from the NASA-ISRO NISAR satellite are publicly available; an early image highlights Nunatak Zaterjavshijsja in East Antarctica, producing a distinctive "hummingbird" shape where the mountain obstructs an ice stream.

CHANDRA / MESSIER 94 MULTI-WAVELENGTH PORTRAIT

• NASA's Chandra X-ray Observatory released a new composite view of NGC 4736 (Messier 94) on June 30, 2026, showcasing the galaxy's starburst ring where star formation appears driven by gas funneled in by the oval-shaped central structure.

🛰️ MISSIONS

SOYUZ MS-28 RETURN COVERAGE SET

• NASA astronaut Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev will undock from ISS Rassvet module at 03:02 EDT Sunday July 26 after a 241-day Expedition 74 mission; NASA has announced live coverage.

ISS EXPEDITION 74 HANDOVER

• The outgoing Soyuz MS-28 crew is actively transferring mission responsibilities to remaining Expedition 74 members; biomedical research to support long-duration spaceflight health continued through Tuesday.

JUNO AT IO — PERIJOVE 57 DATA RELEASED

• MWR footprints from Perijove 57 (December 30, 2023) and a second close flyby have now been fully processed, giving scientists a 3D picture of Io's thermal structure for the first time. ^[9]

NIAC 2026 SELECTIONS ANNOUNCED

• NASA's Innovative Advanced Concepts program announced its 2026 Phase I and Phase II selections; highlighted studies include a sun-dimming controllable dust cloud (DimSun, JPL), a Venus surface architecture concept (CANVAS, JPL), femtosat constellations for Saturn ring mapping, planetary ring in-situ sampling (PRAXIS, JPL), and optical VLBI for direct exoplanet surface imaging.

JAXA HAYABUSA2 / ASTEROID TORIFUNE

• JAXA confirmed a successful flyby of asteroid Torifune by Hayabusa2, with images captured during the encounter released July 6.

JAXA LEV-2 LUNAR ROVER PAPER PUBLISHED

• JAXA's transformable lunar rover LEV-2, deployed during the SLIM mission, has had its lunar demonstration results published in Science Robotics.

☀️ SPACE WEATHER

G1 STORM WATCH — JULY 24

• NOAA SWPC issued Watch WATA20 (Serial 1117) at 19:25 UTC July 22: a G1 Minor geomagnetic storm is predicted for July 24; July 23 and July 25 are expected to remain below G1 threshold.

K-INDEX 4 WARNING ACTIVE TODAY

• NOAA issued a K-index-of-4 warning (Serial 5390) valid from 14:54 UTC July 22 through end of day; conditions consistent with active (not yet storming) geomagnetic levels.

10 CM RADIO BURSTS — JULY 22

• Two solar radio bursts were recorded today: Serial 923 at 06:52 UTC peaked at 200 sfu (2-minute duration, 06:32-06:34 UTC) and Serial 924 at 17:50 UTC peaked at 150 sfu (1-minute burst at 15:52 UTC); background Penticton flux is 149 sfu.

📄 RESEARCH

GWTC-5.0 TESTS OF GENERAL RELATIVITY (LIGO-VIRGO-KAGRA)

• The LIGO-Virgo-KAGRA collaboration presents seven tests of general relativity using all binary signals in the fifth Gravitational-Wave Transient Catalog; GR passes every test in the dynamical strong-field regime covered by the detector network.

GW231123 AND BLACK HOLE SPIN-MASS CORRELATIONS

• A new paper argues that GW231123, the anomalously massive merger reported by LIGO-Virgo-KAGRA, could arise from stellar black holes in a gas-embedded star cluster where accretion generates a spin-mass correlation and vector resonant relaxation drives anti-aligned spins — offering an astrophysical formation channel for the event.

DESI BRIGHT GALAXY SURVEY — 6.7 MILLION SPECTRA

• Full spectral fitting of 6.7 million galaxy spectra from DESI Data Release 1's Bright Galaxy Survey yields a comprehensive catalog of stellar masses, star-formation rates, and ages, providing a benchmark dataset for galaxy evolution science.

JWST NIRSpec CENSUS OF LITTLE RED DOTS AND BALMER ABSORPTION

• A JWST NIRSpec survey finds that radiation-driven outflows producing Balmer absorption features are common in high-redshift (z>4) broad-line AGN, quasars, and variable stars, linking the mysterious "little red dot" population to outflow physics accessible at low redshift only below z~1.

LMC STELLAR INITIAL MASS FUNCTION WITH JWST

• Ultra-deep JWST photometry of the Large Magellanic Cloud's outskirts reveals the low-mass end of the stellar initial mass function under lower-metallicity conditions than the Milky Way, with binary star populations now directly constrained thanks to the telescope's photometric depth.

SOLAR CORONAL HEATING — 3D FORWARD MODELING

• Researchers use three-dimensional forward models to test competing coronal heating theories, finding that heating rates that increase monotonically with distance from the solar surface match observed loop properties at extreme-ultraviolet and X-ray wavelengths better than uniform-heating scenarios.

Space Pulse is compiled from NASA, ESA, JAXA, ESO, NOAA SWPC, and arXiv astro-ph. All times UTC. Next edition tomorrow at 22:00 UTC.

📎 Sources

1. Long March 3B/E | Unknown Payload — Launch Library 2
2. Long March 7A | Unknown Payload — Launch Library 2
3. Soyuz 2.1b/Fregat | Glonass-K1 No. 19 — Launch Library 2
4. Electron | LOXSAT 1 — Launch Library 2
5. Long March 8A | Unknown Payload — Launch Library 2
6. NASA to Host Media Briefing on Roman Telescope, Launching Next… — NASA News Releases
7. NASA’s Juno Takes Temperature of Jupiter’s Fiery Moon Io — NASA News Releases
8. NASA’s Juno Peers Beneath Io’s Surface — NASA News Releases
9. Mapping Io’s Hidden Heat With NASA’s Juno — NASA News Releases
10. New ‘exomoon’ detection challenges cosmic labels — ESO

Curated from official sources — NASA/ESA/JAXA/ESO/NOAA/arXiv/Launch Library. Informational only.
Serial 20260722-22-v35 · 2026-07-22 22:01 UTC · pulse.uzylab.com