Italian scientists are testing a new coronagraphic imaging spectrometer during a total solar eclipse in Spain.
The test aims to demonstrate technology for future space missions by capturing faster and higher-resolution data of the sun's corona. This outer atmosphere of the sun is typically difficult to observe due to the brightness of the solar disk.
Researchers from the Instituto de Astrofísica de Canarias (IAC) are conducting the operation at the Teide Observatory on Tenerife [1, 2]. The instrument, known as the Coronagraphic Imaging Spectrometer (CISS), is designed to provide a more detailed read of the solar corona than previous tools [2]. By using the natural blockage of the sun during the eclipse, the team can verify the spectrometer's performance in a real-world environment [1, 2].
The event took place on Aug. 12, 2024 [1, 3]. This specific alignment provided a rare window for the scientists to validate the CISS technology before proposing it for placement on a satellite or space probe [2].
Beyond the scientific research, the eclipse required significant logistical coordination across the region. Spanish authorities deployed 33,000 law-enforcement officers to manage safety and crowds during the event [4].
The team at the Teide Observatory focused on the spectrometer's ability to isolate specific wavelengths of light. This process allows researchers to determine the temperature and composition of the corona, which is essential for understanding solar flares, and space weather [1, 2].
“The test aims to demonstrate technology for future space missions.”
The successful testing of the CISS instrument on Earth reduces the technical risk for future orbital deployments. If the spectrometer can consistently provide high-resolution data of the corona, it could lead to a new generation of space-based observatories capable of predicting solar activity with greater precision, potentially protecting satellite communications and power grids on Earth.
