SpaceX rideshare deploys 45 satellites & Ireland joins Artemis Accords framework - Space News (May 4, 2026)

SpaceX kept its launch cadence roaring into early May. On May 3, 2026, a Falcon 9 lifted off from Space Launch Complex 4 East at Vandenberg Space Force Base on the CAS500-2 mission, carrying 45 total payloads. The primary satellite—Korea Aerospace Industries’ Compact Advanced Satellite 500-2—was deployed into a sun-synchronous orbit about an hour after liftoff, setting it up for multi-spectral Earth observation after a long delay from its original 2022 target.

After the main spacecraft separated, the upper stage continued a carefully timed rideshare sequence, deploying 44 additional satellites for a mix of operators including Argotec, Exolaunch, Impulso.Space, Loft-EarthDaily, Lynk Global, True Reality, and Planet Labs. Exolaunch coordinated large portions of the manifest, with two distinct deployment windows—one a little over an hour into flight and another more than two hours after launch—highlighting how modern rideshares stack multiple customers into a single, cost-efficient mission.

This launch rhythm also reflects broader demand. The Vandenberg rideshare came just two days after a May 1 Starlink mission from Cape Canaveral that placed 29 broadband satellites into orbit. Running high-tempo campaigns from both U.S. coasts shows how operationally mature the launch system has become—and how strongly the market is pulling for both imaging and communications capacity.

On the international cooperation front, Ireland signed the Artemis Accords on May 4, 2026 at NASA Headquarters in Washington, D.C., becoming the 65th signatory nation. The ceremony included NASA Administrator Jared Isaacman, Ireland’s U.S. Ambassador Geraldine Byrne Nason, and Minister Peter Burke. Ireland’s accession is notable because it makes the country the final European Space Agency member state to join—bringing all ESA members under the same civil exploration principles for activities on the Moon, Mars, and beyond.

The Accords aim to translate broad space-law ideals into practical operating rules: transparency, interoperability, safety zones and deconfliction, and guidelines for handling resources and disputes. With more nations planning lunar missions and sustained surface operations, the report frames this as an attempt to reduce ambiguity before activity becomes crowded—especially as Artemis timelines and infrastructure plans evolve.

For skywatchers, May 2026 is packed. The Eta Aquarid meteor shower—debris from Halley’s Comet—peaks in the early morning hours of May 5 and 6. Under dark skies the shower can approach around 50 meteors per hour, with fast streaks and occasional lingering trains, but this year bright moonlight is expected to wash out many fainter meteors, leaving the brightest events as the most visible.

Later in the month, the western evening sky features a close-looking pairing of a thin crescent Moon and brilliant Venus on May 18. It’s an easy-to-spot conjunction even with moderate light pollution, as long as you have a clear view of the horizon shortly after sunset. Then on May 31, the calendar delivers a second full moon in the same month—a so-called “Blue Moon,” rare in timing even though the Moon’s color stays normal.

One of the biggest scientific headlines in the report comes from the Vera C. Rubin Observatory. Even during early optimization with engineering-quality data, Rubin submitted more than 11,000 previously unknown asteroids to the International Astronomical Union’s Minor Planet Center—an extraordinary single-year batch. The observatory also identified 33 new near-Earth objects, none of which appear to pose an impact risk in the foreseeable future, but all of which improve the completeness of planetary-defense catalogs.

Rubin’s dataset included about a million individual observations over roughly a month and a half, and it wasn’t just about new objects. The same precision astrometry helped recover “lost” asteroids whose orbits had become too uncertain to predict. The survey also flagged hundreds of trans-Neptunian objects, including a couple with unusually elongated or large orbits—clues that could point to different dynamical origins in the outer solar system.

In human spaceflight, NASA and international partners updated the ISS flight schedule for mid-2026 through 2027, balancing cargo, crew rotations, and station maintenance. A key near-term milestone is SpaceX Commercial Resupply Services-34, targeted for no earlier than May 12, 2026, to deliver more than 6,400 pounds of cargo and research. The plan also accelerates Crew-13 to mid-September 2026, listing NASA astronauts Jessica Watkins and Luke Delaney among the crew, reflecting a push to maintain robust staffing and science throughput.

The schedule also continues U.S.–Russia cross-transport cooperation, with Soyuz MS-29 targeted for July 14, 2026 to carry NASA astronaut Anil Menon with Roscosmos cosmonauts Pyotr Dubrov and Anna Kikina. Meanwhile, future cargo flights include Northrop Grumman CRS-25 in fall or winter 2026, delivering roughly 11,000 pounds including ISS Roll Out Solar Arrays—critical upgrades as older arrays age under radiation and thermal cycling. Boeing’s Starliner remains in a technical-review phase following issues identified during the 2024 Crew Flight Test, with future launch timing tied to readiness and safety closure.

Turning to cosmology, researchers described in the report combined recent dark-energy measurements—drawing on the Dark Energy Survey in Chile and the Dark Energy Spectroscopic Instrument in Arizona—to explore whether the cosmological constant might be negative rather than positive. In that scenario, expansion could continue for around 11 billion more years, then slow, stop, and reverse into a contraction lasting about 20 billion years, culminating in a “big crunch.” The report emphasizes this is not settled science: uncertainties remain, and competing interpretations are actively debated.

Finally, the report highlights exotic high-energy events seen by NASA’s observatories. One case, GRB 230906A, is interpreted as a neutron-star merger about 4.7 billion light-years away, in an unusually small galaxy embedded within an intergalactic gas stream—an environment that could reshape how astronomers think about where heavy-element-producing mergers can occur. Another event, GRB 250702B, lasted an unprecedented seven hours and appeared in multiple episodes; one leading hypothesis is a star being tidally disrupted by an intermediate-mass black hole, potentially offering rare insight into a black-hole class that is still poorly characterized.