1844: Birth of Charles Fievez, a pioneer of spectroscopy at the Royal Observatory of Belgium. His study of the Sun's chemical composition propelled Belgian astronomy to the forefront of the 19th-century astrophysical revolution. As the official responsible for ephemerides, he established a rigorous methodology ensuring the repeatability of experiments: by combining the mathematical precision of celestial positions with systematic spectral analysis, he enabled discoveries to be validated through repeated observation. This quest for consistency and proof continues to influence modern research.

2013: The Sun experiences a phase of intense activity, marked by several major X-class solar flares. Thanks to data from the SDO satellite and the expertise of the SIDC (Solar Influences Data Analysis Center) based at the Royal Observatory of Belgium, these phenomena were analysed to predict their impacts on satellites and terrestrial power grids. This vigilance illustrates Uccle’s global role in space weather monitoring.

Image credits : nasa.gov