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By European Space Agency
Video: 00:02:27 2025 marks a landmark year for Europe’s ‘bridge between Earth and space’. The European Space Agency’s Estrack satellite tracking network turns 50.
Since its inception in 1975, Estrack – ESA’s global network of ground stations – has formed the vital communication bridge between satellites in orbit and mission control at the European Space Operations Centre (ESOC) in Darmstadt, Germany.
Now comprising six stations spanning six countries, Estrack has grown into a strategic asset for Europe, enabling communication with spacecraft, transmitting commands and receiving scientific data.
The network keeps an eye on satellites no matter their location: tracking them across Earth orbit, voyaging to comets or asteroids, keeping station at the scientifically important Sun-Earth Lagrange points, and deep into our Solar System. It even keeps tabs on European launchers as they soar into orbit, ensuring no rocket is ever out of reach.
Fittingly, this celebration of technological excellence coincides with the 200th birthday of Johann Strauss II and the 50th anniversary of ESA. To honour this convergence of milestones, ESA and the Vienna Tourist Board are orchestrating a unique mission: broadcasting The Blue Danube Waltz to its destined home among the stars.
Don’t miss the live concert of the Wiener Symphoniker (Vienna Symphony Orchestra) on Saturday, 31 May. The event will start at 20:30 CEST and the transmission from ESA’s Cebreros antenna will occur at 21:30 CEST.
The live stream can be followed via space.wien.info and the Vienna Instagram channel.
Waltzing celebration for half a century of European satellite tracking
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By European Space Agency
With the launch of ESA’s Biomass satellite scheduled for 29 April, preparations at Europe’s Spaceport in Kourou, French Guiana, have reached a key milestone. The satellite has now been sealed inside the protective fairing of the Vega-C rocket – now hidden from view, the satellite is almost ready for its journey into space.
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By NASA
NASA’s Acting Associate Administrator for NASA’s Exploration Systems Development Mission Directorate Lori Glaze, right, and NASA Langley Acting Center Director Trina Dyal spoke at a dedication ceremony for NASA Langley’s Artemis Moon Tree at the center March 12.NASA/Ryan Hill A tree that sprouted from a seed that journeyed around the Moon and back is growing at NASA’s Langley Research Center in Hampton, Virginia.
NASA’s Acting Associate Administrator for NASA’s Exploration Systems Development Mission Directorate Lori Glaze and NASA Langley Acting Center Director Trina Dyal spoke at a dedication ceremony for the Artemis Moon Tree, a loblolly pine, at the center March 12.
“I wanted to quote an old Greek proverb that more or less says something like, ‘Society grows when its elders plant trees whose shade they know they shall never sit in,’ ” said Glaze. “I love that. We always talk about how we stand on the shoulders of giants. Those giants planted seeds, and we are still benefiting from the tremendous roots of those trees,”
The young tree, only about two feet tall right now, is growing in an area between NASA Langley’s Integrated Engineering Services Building and its Measurement Systems Laboratory. The pine is surrounded by a wire plant protector. A yellow label identifies the species and the location of the U.S. Department of Agriculture Forest Services nursery where the seedling was grown — Charles E. Bessey Nursery in Halsey, Nebraska. A small plaque marks its status as a Moon Tree.
“This, we plant here for all future generations to be inspired and to continue on the amazing legacy of what we’re doing,” said Glaze. “Our return to the lunar surface and our journey to Mars through the Artemis campaign is really going to lay the foundation for that future of exploration that right now we’re only dreaming about. With your help, through Langley and the rest of our NASA colleagues and partners, we’re going to achieve those visions.”
NASA Langley’s Artemis Moon Tree is a loblolly pine.NASA/Ryan Hill The loblolly seed was one of many that flew on the Artemis I mission Nov. 16 to Dec. 11, 2022 — journeying 270,000 miles from Earth aboard the Orion spacecraft. NASA’s Office of STEM Engagement partnered with the Forest Services to fly the seeds aboard Artemis I as part of a national STEM Engagement and conservation education initiative.
In addition to loblolly pines, tree species on the flight included sycamores, sweetgums, Douglas firs, and giant sequoias. The Forest Services germinated the seeds.
Locally, NASA Langley’s loblolly pine is one of three Artemis Moon Trees. The Virginia Living Museum in Newport News and the Virginia Zoo in Norfolk were also selected as Moon Tree stewards, and also received loblolly pines.
The Artemis Moon Trees take inspiration from their Apollo precursors. In 1971, NASA astronaut Stuart Roosa, the command module pilot for the Apollo 14 mission and a former U.S. Department of Agriculture Forest Services smoke jumper, carried tree seeds into lunar orbit. The Apollo 14 Moon Trees were disseminated to national monuments and dignitaries around the world, with a large number distributed as part of the nation’s bicentennial event.
One of those Moon Trees, a sycamore, was planted at Albert W. Patrick III Elementary School in the Fox Hill area of Hampton in 1976. Sixth grader Marjorie White wrote a poem called “A Tree Lives” that won a contest to earn the honor.
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By European Space Agency
Lobster-eye satellite Einstein Probe captured the X-ray flash from a very elusive celestial pair. The discovery opens a new way to explore how massive stars interact and evolve, confirming the unique power of the mission to uncover fleeting X-ray sources in the sky.
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By European Space Agency
The European Space Agency's XMM-Newton has detected rapidly fluctuating X-rays coming from the very edge of a supermassive black hole in the heart of a nearby galaxy. The results paint a fascinating picture that defies how we thought matter falls into such black holes, and points to a potential source of gravitational waves that ESA’s future mission, LISA, could see.
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