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🚀 Space Pulse · 2026-06-22 22:01 UTC

SPACE PULSE

Monday, 22 June 2026 | 22:00 UTC

Your daily briefing on space exploration, astronomy, and the cosmos.

⚡ TL;DR

Webb has delivered its first detailed chemical portrait of interstellar comet 3I/ATLAS, revealing a surprising composition that challenges assumptions about planetary system formation. A busy week ahead: an M6.8 solar flare just lit up the sun, Roman arrives in Florida, and a Canadarm2 spacewalk looms on June 30.

🚀 LAUNCHES

ATLAS V 551 | AMAZON KUIPER LEO (LA-08)

  • United Launch Alliance is targeting 2026-07-02 at 04:24 UTC for the next batch of Amazon Kuiper broadband satellites, part of the Project Kuiper low-Earth-orbit mega-constellation managed by Kuiper Systems LLC, a subsidiary of Amazon. [1]

🔭 DISCOVERIES

INTERSTELLAR COMET 3I/ATLAS - WEBB CHEMICAL FINGERPRINT

  • NASA's James Webb Space Telescope captured detailed spectral measurements of interstellar comet 3I/ATLAS in December 2025 as it moved away from the Sun after its closest solar approach. [2] [3]
  • Webb's data revealed a surprising chemical makeup compared to Solar System comets, raising new questions about how unique or common the conditions that formed our own Solar System actually are. [4] [2]
  • ESA and NASA both confirmed the result today, June 22, making 3I/ATLAS only the third confirmed interstellar object detected in human history. [4] [3]

NASA NANCY GRACE ROMAN SPACE TELESCOPE ARRIVES IN FLORIDA

  • NASA's Nancy Grace Roman Space Telescope was delivered to Kennedy Space Center on June 21, completing integration and testing at Goddard Space Flight Center in Greenbelt, Maryland. [5]
  • Roman is now entering final prelaunch preparations at KSC ahead of its planned liftoff later this summer. [5]

BERING SEA SUMMER SOLSTICE THAW

  • NASA Earth Observatory imagery captured drifting sea ice fragments near Alaska's Saint Lawrence and Nunivak islands alongside colorful phytoplankton-rich waters around the Yukon Delta, marking the approach of the summer solstice. [6] [7]

🛰️ MISSIONS

ISS EXPEDITION 74 - SPACEWALK 95 PREPARATIONS

  • NASA has announced US Spacewalk 95 is scheduled for Tuesday, June 30, beginning at approximately 08:35 a.m. EDT (12:35 UTC), with astronauts set to replace a wrist joint on the station's Canadarm2 robotic arm. [8]
  • Expedition 74 crew members began spacewalk preps this Monday alongside bioengineering cartilage tissue experiments and advanced space manufacturing work aboard the ISS. [9]
  • NASA and CSA (Canadian Space Agency) will host a preview news conference before the June 30 EVA. [8] [10]

JAXA MICHIBIKI SPATIAL CERTIFICATION DEMONSTRATION

  • JAXA and Spacid have begun a joint demonstration project of the Michibiki Spatial Certification System, leveraging Japan's Quasi-Zenith Satellite System (QZSS) "Michibiki" constellation.

KSC MASTER PLANNING UPDATE

  • Kennedy Space Center's Master Planning team published updated long-range framework guidance coordinating land, infrastructure, and facility development in collaboration with federal partners and commercial entities to support future missions.

☀️ SPACE WEATHER

M6.8 SOLAR FLARE - R2 MODERATE RADIO BLACKOUT (ACTIVE NOW)

  • An M6.8 X-ray flare began at 19:17 UTC on June 21, peaked at 19:29 UTC, and per the NOAA summary remained active through at least 19:35 UTC on June 22, originating from region S07E55 with an optical class of 2b.
  • NOAA SWPC rated the event R2 - Moderate on the radio blackout scale, and a Type II radio emission was detected beginning at 19:32 UTC June 21 with an estimated shock velocity of 380 km/s, indicating an associated coronal mass ejection.
  • Watch for potential geomagnetic activity in the coming days as this CME propagates; operators of HF radio, GPS, and satellite systems should monitor SWPC updates.

EARLIER JUNE GEOMAGNETIC ACTIVITY - NOW SUBSIDED

  • A G2 (Moderate) geomagnetic storm watch issued June 11 for June 12-14 was formally cancelled by NOAA on June 14, with G1 (Minor) conditions having failed to materialize as forecast.
  • The most intense geomagnetic activity during June 9-13 reached K-index 5 (G1 Minor scale) on June 11, with multiple Type II radio emissions detected, the fastest of which clocked a shock velocity of 1,127 km/s on June 10.
  • A GOES-19 high-energy electron flux alert (2 MeV integral flux exceeding 1,000 pfu) was triggered on June 13 at 13:32 UTC, a radiation environment hazard for spacecraft in medium and high Earth orbit.

📄 RESEARCH

NOTE: No arXiv astro-ph preprints were included in today's official data feed. The Webb 3I/ATLAS result referenced above may be accompanied by a forthcoming peer-reviewed paper; readers are advised to check arxiv.org/abs/astro-ph for the associated submission.

AD ASTRA WORKSHOP - SUBMISSION DEADLINE EXTENDED

  • NASA has extended the abstract and mission concept submission deadline for the Ad ASTRA astrophysics workshop to July 1, 2026, under both the Cosmic Origins and Physics of the Cosmos programs.

AI/ML IN SPACE SCIENCE - UPCOMING LECTURE

  • NASA's AI/ML Science Technology Implementation Group (STIG) is hosting a lecture on June 29, 2026, featuring speaker Steven M. Crawford from NASA Headquarters; details on connection and content are forthcoming.

That is your Space Pulse for 22 June 2026. The 3I/ATLAS Webb result is the headline of the week - an interstellar visitor handing us a chemical message from another star system. Roman on the launch pad and a fresh M-class flare keep the pace high. Check back tomorrow for updates on the 3I/ATLAS paper, CME tracking, and Roman launch scheduling.

📎 Sources

  1. Atlas V 551 | Amazon Leo (LA-08) — Launch Library 2
  2. NASA’s Webb Finds Clues to Ancient, Distant Origin of Comet 3I/ATLAS — NASA News Releases
  3. NASA’s Webb Finds Clues to Ancient, Distant Origin of Comet 3I/ATLAS — NASA Science
  4. Webb finds clues to ancient origin of Comet 3I/ATLAS — ESA Top News
  5. NASA’s Next Generation Telescope Arrives in Florida Ahead of Launch — NASA Science
  6. Signs of Thaw in the Bering Sea — NASA News Releases
  7. Signs of Thaw in the Bering Sea — NASA Science
  8. NASA to Cover US Spacewalk 95, Host Preview News Conference — NASA News Releases
  9. Crew Starts Week with Bioengineering, Space Manufacturing, and Spacewalk Preps — NASA Science
  10. NASA to Cover US Spacewalk 95, Host Preview News Conference — NASA Science

Curated from official sources — NASA/ESA/JAXA/ESO/NOAA/arXiv/Launch Library. Informational only.
Serial 20260622-22-v9 · 2026-06-22 22:01 UTC

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