Proposed New Mission Will Create Artificial Solar Eclipses in Space

Why It Matters

Extended, clean observations of the solar corona will improve space‑weather forecasting, protecting power grids, satellite networks, and navigation systems from costly solar‑storm disruptions.

Key Takeaways

• Mesom uses Moon as natural occulter for solar corona
• Provides up to 48‑minute eclipse windows monthly
• Targets inner corona down to chromosphere layer
• Aims to improve space‑weather forecasting accuracy
• ESA mission proposal slated for 2030s launch

Pulse Analysis

Solar storms, driven by coronal mass ejections, pose a growing threat to modern infrastructure, from power grids to satellite navigation. The 1989 Quebec blackout and the 2024 GPS disruptions illustrate how even moderate events can generate billions in losses. Forecasting these disturbances relies on detailed knowledge of the Sun’s outer atmosphere, the corona, where magnetic energy builds before release. Traditional ground‑based coronagraphs are hampered by atmospheric turbulence, while space‑borne instruments such as SOHO’s LASCO and ESA’s PROBA‑3 still struggle to image the innermost coronal layers because of diffraction artifacts and limited occultation duration.

The Moon‑enabled Sun Occultation Mission (Mesom) proposes a clever workaround: positioning a mini‑satellite in the Moon’s shadow to create artificial total eclipses lasting up to 48 minutes each month. By using the Moon’s near‑perfect spherical shape and lack of atmosphere, Mesom can block the photospheric glare far more cleanly than any engineered occulter, allowing continuous observation of the inner corona down to the chromosphere. The mission design, funded by the UK Space Agency and backed by an international consortium, targets at least 400 minutes of high‑resolution coronal data over a two‑year science phase, far exceeding the cumulative observing time of all terrestrial eclipses combined.

If successful, Mesom could transform space‑weather prediction models, delivering the high‑cadence, low‑noise measurements needed to refine magnetic field reconstructions and CME initiation forecasts. Utilities, aviation, and GNSS operators would benefit from earlier alerts and reduced outage risk, while the scientific community would gain unprecedented insight into plasma confinement mechanisms. The proposal’s submission to ESA for a 2030s launch also signals a shift toward leveraging natural celestial bodies for instrumentation, a strategy that may inspire future missions seeking cost‑effective, high‑performance observations of other astrophysical targets.