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Astronomy Daily — S05E90 | Wednesday, April 22, 2026 In today's episode, Anna and Avery cover six stories spanning the fading power of humanity's most distant probe, fresh evidence for ancient life on Mars, a landmark black hole measurement, a SpaceX reusability milestone, a sobering assessment of the Artemis spacesuit programme, and tonight's moon and Jupiter conjunction. Story 1 — Voyager 1 Powers Down the LECP Instrument • NASA's JPL shut down Voyager 1's Low-energy Charged Particles experiment (LECP) on April 17, 2026, to conserve dwindling power. • The decision followed an unexpected power drop during a routine roll manoeuvre in late February that nearly triggered an automatic emergency shutdown. • Seven of Voyager 1's ten original instrument sets are now offline. Only the magnetometer and plasma wave subsystem remain active. • Engineers are developing 'the Big Bang' — a plan to swap older components with lower-power alternatives — to extend operations into the 2030s. Testing on Voyager 2 is planned for May/June 2026; Voyager 1 to follow no sooner than July. • Source: NASA JPL — https://www.jpl.nasa.gov/news/nasa-shuts-off-instrument-on-voyager-1-to-keep-spacecraft-operating/ Story 2 — Curiosity Rover Finds Organic Molecules on Mars • Published April 21 in Nature Communications, the study describes the first use of the TMAH chemical experiment on another planet. • More than 20 organic molecules were detected in clay-rich sandstone from the Glen Torridon region of Gale Crater, preserved for over 3.5 billion years. • Discoveries include a nitrogen-bearing molecule structurally similar to DNA precursors — never before confirmed on Mars — and benzothiophene. • The experiment cannot determine whether molecules are biological, geological, or meteoritic in origin. Future missions including Rosalind Franklin and Dragonfly will build on the technique. • Source: phys.org — https://phys.org/news/2026-04-mars-rover-compounds.html Story 3 — Black Hole Jets in Cygnus X-1 • Curtin University-led study published April 16 in Nature Astronomy directly measures the instantaneous power of black hole jets for the first time. • The jets in the Cygnus X-1 system carry energy equivalent to 10,000 suns and travel at approximately half the speed of light (150,000 km/s). • Researchers used the companion star's stellar winds to 'bend' the jets, allowing calculation of their real-time power — a technique compared to watching wind deflect a fountain. • About 10% of the energy released as matter falls into the black hole is carried away by the jets — confirming a long-held theoretical assumption. • The measurement will help calibrate future observations from the Square Kilometre Array Observatory, currently under construction in WA. • Source: ScienceDaily — https://www.sciencedaily.com/releases/2026/04/260416071949.htm Story 4 — SpaceX 600th Rocket Landing • SpaceX completed its 600th successful Falcon booster landing on April 19, 2026, during the Starlink 17-22 mission from Vandenberg SFB. • Booster B1097 landed on drone ship 'Of Course I Still Love You' for its eighth successful recovery. The milestone arrived just 7 months after the 500th landing. • The tally includes 496 drone ship landings and 104 ground landings, per SpaceX VP Kiko Dontchev. • SpaceX's Starlink constellation now numbers over 10,275 satellites in orbit. • Source: Space.com — https://www.space.com/space-exploration/launches-spacecraft/spacex-starlink-17-22-b1097-vsfb-ofisly-600th-falcon-landing Story 5 — Artemis Spacesuit Crisis • NASA's Office of Inspector General report (released April 20) warns that next-generation Artemis spacesuits may not be ready until 2031 — three years after the stated 2028 target. • The xEVAS programme began as a two-company competition (Axiom Space + Collins Aerospace). Collins has effectively been removed after missing milestones. Axiom is now the sole contractor for the lunar surface suit. • OIG analysis: based on an 8.7-year historical average from contract award to first flight for comparable NASA programmes, Axiom's 2022 award points to a 2031 delivery. • NASA Administrator Isaacman has publicly maintained confidence in the 2028 date. Axiom plans a suit demonstration in 2026 on the ISS or during an Artemis mission. • A separate risk: if the ISS variant of the suit slips past 2030, the Station could run out of operational EVA suits before decommissioning. • Additional Artemis delays: SpaceX lunar Starship at least 2 years late; Blue Origin Blue Moon at least 8 months late (per separate March OIG report). • Source: SpaceDaily — https://spacedaily.com/sd-n-the-spacesuit-gap-why-artemis-iiis-2028-landing-date-is-already-slipping/ Story 6 — Skywatching: Moon & Jupiter Conjunction • Tonight (April 22), the half moon sits approximately 3 degrees from Jupiter in the constellation Gemini, near the stars Castor and Pollux. • Visible to the naked eye in the western/northwestern sky after sunset. Binoculars will reveal Jupiter's four Galilean moons. • Southern Hemisphere viewers: look northwest after dark; viewing window narrows the further south you are. • Source: Space.com — https://www.space.com/stargazing/the-moon-and-jupiter-steal-the-show-after-sunset-on-april-22

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