In the 1960s, two organizations were formed for cooperation around a European presence in space: the European Space Research Organization, which focused on scientific research, and the European Launcher Development Organization, which concentrated on engineering launch systems. By the end of the decade, however, dissatisfaction was growing with this split structure, and in 1968, theContinue reading "May 31, 1975: ESA begins operations"

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Looking for a sky event this week? Check out our full Sky This Week column.  May 30: Fly a cosmic kite Full Moon occurs at 4:45 A.M. EDT on May 31, bringing us May’s second Full Moon and the first — and only — Blue Moon of 2026. Shortly after that, at 5 A.M. EDT, the FullContinue reading "The Sky Today on Sunday, May 31: Blue Moon, red star"

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Harry Clement Stubbs – perhaps better known by his penname, Hal Clement – was born near Boston on May 30, 1922. Stubbs earned a B.S. in astronomy from Harvard University in 1943, followed by master’s degrees in chemistry and education. After military service in the Army Air Corps in World War II, he began workContinue reading "May 30, 1922: The birth of Harry Clement Stubbs"

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Looking for a sky event this week? Check out our full Sky This Week column.  May 29: Split Nu Draconis Already high in the eastern sky an hour after sunset is the constellation Boötes the Herdsman. Easy to find thanks to its brightest star, the magnitude –0.1 red giant Arcturus, the stars of this constellation form aContinue reading "The Sky Today on Saturday, May 30: Fly a cosmic kite"

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Cape Canaveral Space Force Station (CCSFS) in Florida resumed operations Friday following the explosion of Blue Origin’s New Glenn rocket during a test Thursday night. Space Launch Delta 45 (SLD 45), which manages the U.S. Space Force’s Eastern Range and oversees all East Coast rocket and missile launches, said Friday that a SpaceX Falcon 9 rocket deployedContinue reading "New Glenn explosion: what it means for Blue Origin and SpaceX"

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After completing what it said was a “thorough assessment,” the FAA on Wednesday ordered SpaceX to investigate anomalies that its Super Heavy booster experienced during the 12th test flight of its behemoth Starship rocket. The aviation regulator on Tuesday was ambiguous about whether an investigation would be required into Starship Flight 12, which launched Friday evening fromContinue reading "FAA grounds SpaceX Starship after V3 debut"

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Ahead of what observers anticipate will be the largest initial public offering (IPO) in history, SpaceX debuted its largest rocket yet on a mostly successful mission. Though Starship and the Super Heavy booster — which combined stand more than 400 feet (122 meters) tall, nearly the length of a Boeing 777 — suffered multiple engineContinue reading "What Starship Flight 12 means for SpaceX’s IPO"

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As winter’s brilliant stars slip toward the western horizon and the constellations of spring climb higher, Northern Hemisphere observers discover a quieter but richly rewarding sky. Spring is celebrated for its galaxies, yet our own Milky Way offers an equally compelling bounty of open and globular clusters. From youthful, loosely packed groups that still sparkleContinue reading "Observe spring’s star clusters"

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One of the most important eclipses in history happened in 1919. This particular eclipse cut a path across South America and the Atlantic Ocean, and landed on the west coast of Africa. Waiting on the island of Principe, in the Gulf of Guinea off the west coast of Africa, was a team of astronomers armedContinue reading "May 29, 1919: History’s most important eclipse"

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Looking for a sky event this week? Check out our full Sky This Week column.  May 28: Scorpius holds M80 High in the northeast this evening, located within the head of Draco the Dragon, is one of the sky’s most famous and easy-to-split double stars. Nu (ν) Draconis appears to shine as a single 4th-magnitude star toContinue reading "The Sky Today on Friday, May 29: Split Nu Draconis"

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