ESA plans a live eclipse as PUNCH times one storm arrival within 30 minutes
ESA will broadcast the 12 August total solar eclipse live from Teruel, while NASA's PUNCH mission retrospectively timed one coronal mass ejection's Earth arrival to within 30 minutes.
Science··Midday
ESA will broadcast the 12 August eclipse live from Teruel
The European Space Agency announced on 5 August that it will broadcast the 12 August total solar eclipse live from the Observatorio Astrofísico de Javalambre in Teruel, Spain, on ESA Web TV and YouTube. Totality will last 1 minute and 21 seconds at the broadcast site, and the path of totality crosses Greenland, Iceland, north-eastern Portugal and Spain. The broadcast will take live feeds from two more points on that path: an ESA public event in León, and Frómista. The programme will cover the agency's Sun-observing missions Solar Orbiter, Smile and Proba-3, with ESA Director of Science Carole Mundell and observatory director Javier Cenarro taking part. ESA stresses that during the partial phases the Sun may only be viewed through certified eclipse glasses, and that direct viewing is safe only during totality. Days before the eclipse, the announcement fixes which channels and sites will carry the event. The same plan places the agency's solar missions beside totality and pairs public access with a safety warning, while León and Frómista supply further live angles along the path from the Teruel studio site.[1]
PUNCH reproduced one CME arrival to within 30 minutes
On the measurement side of the same solar agenda, NASA said its PUNCH mission, which images the inner solar system with four spacecraft once every four minutes, reproduced the arrival at Earth of a coronal mass ejection that left the Sun on 31 May 2025 to within 30 minutes. Methods in use today give windows of roughly five hours; NASA describes the improvement as about ten times better than those methods. The prediction was made 12 hours after the ejection left the Sun and 8 hours before the predicted arrival. The mission's principal investigator is Craig DeForest of the Southwest Research Institute in Boulder. The result was presented at a COSPAR scientific meeting, and the manuscript is under review at the journal Space Weather. According to the NASA account reported by Phys.org, there is a single retrospective event, and the claim has not completed peer review. NASA presents this as a proof of concept rather than established forecasting performance. Even so, the agency reports that it rebuilt one solar storm's Earth arrival time inside a far tighter window than today's operational ranges, with the four spacecraft imaging once every four minutes as the sampling setup for that narrower window.[2]
Public broadcast and arrival timing share one solar week
The two developments place, in the same week, how space agencies present the Sun to the public and to operators. On the ESA side, the 12 August eclipse is tied to a broadcast schedule from the Teruel observatory with live links from León and Frómista, and Solar Orbiter, Smile and Proba-3 will feature on that programme. On the NASA side, PUNCH offers a retrospective test that placed the 31 May 2025 ejection's arrival inside a 30-minute window; against the roughly five-hour windows of methods in use today, NASA calls that about a tenfold improvement. The eclipse announcement centres on viewer safety, the certified glasses warning and live access. The PUNCH account centres on tighter arrival time measurement and on carrying that claim to a COSPAR meeting and Space Weather peer review. Read together, one agency plans the publicly viewable solar moment through broadcast infrastructure while the other has tested the arrival of a plasma cloud leaving the Sun with more frequent imagery from four spacecraft in the inner heliosphere. Both agencies treat the Sun as more than a sky spectacle: they treat it as an object whose timing and access must be set. One foregrounds the public viewing path, the other the tighter measurement of arrival time.[1], [2]
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