A fireball streaked across the northeastern United States on Saturday and broke apart over northeastern Massachusetts and southeastern New Hampshire just after 2:00 PM EDT (18:06 UTC), NASA confirmed. The agency's deputy news chief Jennifer Dooren said the meteor was travelling at 75,000 miles per hour (more than 120,000 km/h) at an altitude of 40 miles (64 km) when it disintegrated. The explosion was equivalent to 300 tons of TNT and produced loud booms that echoed across the region.

SpaceX completed its 50th Starlink mission of 2026 and its 10th and final launch of May with the Starlink 17-41 mission. A Falcon 9 rocket lifted off from pad 4E at Vandenberg Space Force Base at 8:25 AM PDT (15:25 UTC) on 30 May. Separately, Elon Musk filed to take SpaceX public, drawing sharp criticism from financial commentators who likened the IPO filing to the widely derided WeWork offering, warning that retail investors could end up bearing outsized risk.

NASA announced that the X-59 quiet supersonic research aircraft programme has completed a progress review and is preparing for its first supersonic flight. The project team has conducted 15 subsonic test flights to date, reaching speeds up to Mach 0.95 and altitudes of up to 43,000 feet. The aircraft is designed to produce a quiet sonic "thump" rather than a traditional sonic boom, with data intended to inform potential changes to regulations banning commercial supersonic flight over land.

NASA has selected seven companies to provide construction, revitalisation, and infrastructure improvements at Johnson Space Center in Houston under a multiple-award construction contract worth up to $300 million (approximately €270 million). The work covers upgrades to mission-support facilities, utilities, and equipment across the campus. All funds must be obligated by 30 September 2026.

China placed four Guowang direct-to-device test satellites into orbit from the Xichang launch centre aboard a Long March 2D Y119 rocket. The satellites are intended to prove upgrades and new technologies for China's planned connectivity mega-constellations. The launch is part of a broader Chinese effort encompassing at least six mega-constellation programmes in low Earth orbit aimed at expanding satellite-based communications services.