Lat: 30.3°N, Long: 38.8°E, Diam: 24 km, Depth: 2.59 km, Rükl: 15
Depth data from Kurt Fisher database
- Arthur, 1974: 2.59 km
- Westfall, 2000: 2.59 km
- Viscardy, 1985: 2.59 km
Gustav Kirchhoff (March 12, 1824 - October 17, 1887) was a German physicist who, with Robert Bunsen, established the theory of spectrum analysis (a technique for chemical analysis by analyzing the light emitted by a heated material), which Kirchhoff applied to determine the composition of the Sun. He found that when light passes through a gas, the gas absorbs those wavelengths that it would emit if heated, which explained the numerous dark lines (Fraunhofer lines) in the Sun's spectrum.