Mission Notes
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- Sep 23, 2026
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To reach Jupiter, Juice took a detour past Venus. Now it is returning to Earth for another gravitational boost, while using our Moon to rehearse the navigation it will need around Jupiter’s icy moons. (opens the original)
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ESA’s Jupiter Icy Moons Explorer is approaching Earth again, but home is only a waypoint. On 28 September 2026, Juice will skim about 8,640 kilometres above the planet, letting Earth’s motion and gravity bend its path and increase its speed relative to the Sun by about 3.5 kilometres per second. The encounter is the third of four planned gravity assists. It follows the first lunar-Earth double flyby in 2024 and a Venus flyby in August 2025. One more Earth pass in January 2029 will finally place
During a close pass over comet 67P, Rosetta’s star trackers registered hundreds of sunlit dust grains as “false stars,” disorienting a spacecraft more than 400 million kilometres from Earth and forcing it into safe mode. (opens the original)
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On 28 March 2015, ESA’s Rosetta spacecraft passed about 14 kilometres above the surface of Comet 67P/Churyumov–Gerasimenko. That close view brought it into a denser part of the comet’s coma, where gas released by warming ice was carrying dust away from the nucleus. The dust did not need to strike Rosetta to cause trouble. Sunlight reflecting from nearby grains made them appear as bright points in the spacecraft’s star-tracker cameras. Onboard software that was meant to recognise the fixed geomet
The 28.6-kilogram amateur-radio satellite AO-7 went silent in mid-1981 after its batteries shorted. Then, on 21 June 2002—21 years later—British radio ham Pat Gowen heard it transmitting again: one of its shorted batteries had somehow become an open circuit, allowing the spacecraft launched in Novem (opens the original)
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On June 21, 2002, British radio amateur Pat Gowen, G3IOR, was listening near the two-metre satellite band when he found a slow Morse signal around 145.974 MHz. Its frequency moved with the Doppler shift expected from an orbiting transmitter. The identification was improbable but soon inescapable: the signal belonged to AMSAT-OSCAR 7, a satellite that had been considered dead since 1981. The return did not mean that anyone had repaired AO-7 or sent it a software command. The explanation accepted
On 22 January 1997, Lottie Williams was walking through a park in Tulsa, Oklahoma, when a small scrap of blackened fibreglass tapped her shoulder and fell into the grass; it was identified as debris from a Delta II rocket stage launched nine months earlier, making her the only person known to have b (opens the original)
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At about 3:30 a.m. on January 22, 1997, Lottie Williams was walking with friends in O’Brien Park in the Tulsa area when a bright streak crossed the sky. Roughly half an hour later, something brushed her shoulder. A small, blackened piece of woven material dropped behind her into the grass. It was light, about 15 centimeters long, and sounded metallic when tapped. A Delta II second stage had reentered over the south-central United States that morning. Large pieces landed along the same path in Te
Every private lander that reached the lunar surface before 2025 either crashed or tipped over—then Blue Ghost touched down upright in March 2025 and returned data throughout an entire lunar day before losing power after sunset. (opens the original)
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Firefly Aerospace’s Blue Ghost landed in Mare Crisium at 3:34 a.m. Eastern time on March 2, 2025. It arrived upright, deployed its communications hardware and began a surface campaign that lasted from lunar morning to lunar sunset. That sequence made Blue Ghost the first fully successful commercial Moon landing, but not the first commercial soft landing. Intuitive Machines’ Odysseus had reached the surface a year earlier and continued transmitting from its side. The distinction matters because B
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