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| Webb’s pinhole mask is letting astronomers resolve details on Io and young stars that ordinary imaging cannot reach. |
Top 15 Space & Astronomy Stories
- Webb Applies Pinhole Mask to Study Io and Young Stars — NASA Science
The technique places a mask with several small pinholes in the light path to enable aperture masking interferometry. Teams used it to observe the massive binary Wolf-Rayet 137, the young star PDS 70, and Jupiter’s moon Io. The method combines light from separate parts of the telescope mirror to achieve higher resolution than standard imaging. It reveals fine structures such as volcanic features on Io and dust distributions around forming planets. Follow-up observations are planned to track changes in these systems over multiple orbits. Source: science.nasa.gov - ESA Satellites Capture Athens Wildfires at Multiple Scales — European Space Agency
Sentinel-2 imaged the burned area and smoke plume on 2 August 2026. Sentinel-3 recorded the wider smoke extent across parts of Greece. The paired views show both localized damage and regional atmospheric transport. Data will help refine fire-spread models used by emergency services. Source: esa.int - Commercial Lunar Landers Advance in Clean-Room Testing — NASA
Multiple landers are undergoing final assembly and checks ahead of flights supporting the NASA Moon Base program. Each vehicle is being prepared in separate facilities across the United States. The work focuses on propulsion, landing systems, and payload interfaces. Source: nasa.gov - Astronaut Chris Williams Completes 241-Day Mission Recap — NASA
Williams returned on 27 July after eight months aboard the International Space Station. The live session reviewed experiments conducted during the flight and post-landing medical checks. Data from the mission will contribute to long-duration crew health studies. Source: nasa.gov - Reddit AMA Examines 50 Years of Mars Exploration — NASA
Scientists will answer questions on past, present, and future Mars missions during the 5 August event. Topics include rover findings, sample-return planning, and upcoming orbiter observations. The session is hosted in the r/askscience community. Source: reddit.com - Falcon 9 Places Three BlueBird Satellites in Orbit — space.com
The launch from Cape Canaveral carried AST SpaceMobile’s BlueBird 11, 12, and 13 spacecraft. Each satellite is designed for direct-to-cell connectivity. Deployment was confirmed shortly after separation. Source: space.com - Upper-Stage Impact Prediction Updated for Lunar Collision — r/space
Refined orbital calculations now indicate the Falcon 9 upper stage will strike the Moon on a known trajectory. Impact timing and location will be monitored by orbiting spacecraft. The event offers a chance to study fresh crater formation. Source: reddit.com - High-School Team Wins CanSat Hungary with Atmospheric Probe — r/space
The SAS-3 micro-satellite carried a downward 4K camera, FLIR thermal imager, and ESP32-S3 telemetry system. Real-time data included altitude, pressure, temperature, acceleration, and GPS. The project earned first place and a special award for suborbital systems. Source: reddit.com - European Think Tank Flags Growing Orbital Compute Gap — SpaceNews
The European Space Policy Institute warns that reliance on non-European data centers in orbit is increasing. U.S. commercial and Chinese state programs are accelerating space-based computing capacity. The report calls for coordinated European investment to close the difference. Source: spacenews.com - ESA Prepares Live Broadcast of August Total Solar Eclipse — ESA Activities
The agency will stream the 12 August event from 19:30 to 20:45 CEST. Ground activities are scheduled in León, Spain, alongside the remote broadcast. Educational materials and graphics accompany the coverage. Source: esa.int - Eclipse Chasers Gather in Spain for Rare Darkness — Phys.org Space
Observers describe the sudden violet twilight, temperature drop, and unusual animal behavior during totality. The event draws international visitors to the path of the Moon’s shadow. Source: phys.org - APOD Highlights Spokes in Saturn’s B Ring — NASA Science
Recent images show radial features crossing the bright B ring. The spokes appear and fade over hours, linked to the planet’s magnetic field and ring-particle interactions. Source: science.nasa.gov - Spirit Rover Data Reveal Widespread Ancient Mars Water — Universe Today
Paolo de Souza re-examined Mössbauer spectrometer readings from Gusev Crater. Combined measurements show mineral signatures that form only in liquid water. The pattern indicates more extensive past hydration than single observations suggested. Source: universetoday.com - Simulations Indicate Ongoing Geological Activity on Venus — Universe Today
ETH Zurich models suggest rift valleys remain active rather than ancient relics. The findings will shape instrument priorities for upcoming Venus missions. Source: universetoday.com - PUNCH Mission Demonstrates 30-Minute Solar-Storm Forecast — Phys.org Space
Continuous imagery from the Polarimeter to Unify the Corona and Heliosphere allowed arrival predictions within half an hour during a test eruption. Results are under review at Space Weather. Source: phys.org
Cosmic Spotlight
Webb’s aperture-masking observations of Io captured surface details at scales previously limited to flyby spacecraft. The mask turns the telescope into an interferometer by sampling light through discrete pinholes, then recombining the beams to reconstruct finer structure. This approach bypassed the glare of Jupiter while resolving volcanic hotspots and plume deposits. The same mode also mapped dust gaps around PDS 70, showing where planets are clearing material. Next, teams will apply the technique to additional targets during upcoming visibility windows. How small a feature on a distant exoplanet moon might this method eventually reveal?
Cosmic Deep Dive: How Aperture Masking Turns a Telescope into an Interferometer
Picture a 6.5-metre mirror reduced, for a few minutes, to a handful of coin-sized openings spaced metres apart; the light that passes through those openings travels separate paths yet still interferes at the detector as though the entire mirror had been used at once. Riding alongside one photon, you would see it take one pinhole route while its twin takes another, the two waves arriving with a tiny delay that encodes the exact angular separation of the source. That delay is measured in fractions of a wavelength, letting the instrument resolve details ten times finer than the telescope’s normal diffraction limit. On Io the technique isolated individual volcanic vents separated by only tens of kilometres; on PDS 70 it traced gaps in the protoplanetary disk narrower than the orbit of Jupiter. Yet the same mask also discards most of the starlight, so exposure times stretch and faint targets remain out of reach. The open question is whether future masks with hundreds of pinholes, paired with advanced wavefront sensing, can push the resolution even closer to the theoretical maximum set by the mirror diameter itself.
New data keep reshaping how we read the solar system’s ongoing story. |
