Astronomy Daily S05E159 — Wednesday, 5 August 2026. In this episode: a power-saving “Big Bang” keeps Voyager 2 doing science, direct-to-phone satellites reach orbit, Curiosity finds a vast honeycomb field on its 14th Martian anniversary, and NASA’s Aspera prepares to hunt the universe’s missing gas.
① Voyager 2’s “Big Bang” power save • JPL engineers freed up power by simultaneously switching off certain devices and substituting lower-power alternatives, while keeping the spacecraft warm enough to operate. • The Voyagers run on radioisotope thermoelectric generators (RTGs) and lose ~4 watts per year as their plutonium decays; after nearly 50 years, power margins are razor-thin. • The move keeps three instruments — magnetometer, plasma wave subsystem and cosmic ray subsystem — running at least a year longer; the same swap is planned for Voyager 1. • Voyager 2 crossed the heliopause in Nov 2018 and is now >13 billion miles (21 billion km) from Earth; its southerly path means it is commanded via the Canberra Deep Space Network dish.
Source: NASA/JPL Voyager blog, 4 Aug 2026 · science.nasa.gov/blogs/voyager
② AST SpaceMobile BlueBird 11–13 • Three next-generation direct-to-smartphone satellites launched on a Falcon 9 from Cape Canaveral (liftoff targeted 3:42 a.m. EDT, 5 Aug; backup 5:10 a.m.). • Their phased-array antennas span ~2,400 sq ft — the largest commercial arrays ever deployed in low Earth orbit — and connect to standard, unmodified phones. • They deliver nearly double the peak download speed of the first-generation BlueBirds (which hit ~98.9 Mbps to a phone); the company targets beta service later in 2026.
Source: AST SpaceMobile / Space.com, Aug 2026 · confirm deployment before publish
③ Curiosity’s “sea of polygons” + 14 years • Curiosity found its largest-ever field of honeycomb-like polygonal fractures (each ~4–8 cm across) in a valley nicknamed “Valle Grande” on Mount Sharp. • The 360° panorama was captured on 19–20 June from 340 images; the polygons wrap around a ~6 m butte nicknamed “Miraflores.” • Such patterns point to ancient water — drying mud, wet–dry cycles, or compaction — consistent with lakes and streams once present on Mount Sharp’s foothills. • Today, 5 August, is Curiosity’s 14th landing anniversary (landed 5 Aug 2012).
Source: NASA/JPL, announced ~29 Jul 2026 · jpl.nasa.gov
④ NASA’s Aspera (mission preview) • Aspera is a shoebox-sized NASA Pioneers smallsat launching NET 15 Aug on a Rocket Lab Electron from Mahia, New Zealand. • It is the first NASA astrophysics mission to map the circumgalactic medium — hot gas around galaxies — in ultraviolet light, tracing the “missing baryons.” • Led by Carlos Vargas at the University of Arizona, one of the youngest principal investigators in NASA history.
Source: NASA Pioneers / Rocket Lab, 2026 · rocketlabcorp.com
⑤ Skywatch • Tonight (5 Aug): Last Quarter Moon; Mars forms a triangle with Elnath and cluster M35 (binoculars help). • 12 Aug: total solar eclipse (Arctic–Greenland–Iceland–northern Spain; partial for parts of the US) — not visible from Australia; use ISO 12312-2 eclipse glasses. • 12–13 Aug: Perseid peak under a New Moon (NH-favoured); plus a six-planet pre-dawn alignment. • SH targets: eta-Eridanids peak 7 Aug; Sagittarius star fields; deep partial lunar eclipse 27–28 Aug (Americas + parts of Europe/Africa).
Source: NASA Skywatching “What’s Up” Aug 2026; Sky & Telescope; timeanddate.com
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