Hot Shadows of Jupiter

See allHide authors and affiliations

Science  26 Feb 1965:
Vol. 147, Issue 3661, pp. 1035-1036
DOI: 10.1126/science.147.3661.1035


On the evenings of 26 October and 15 December 1962, while the disk of Jupiter was being scanned for thermal emission in the 8- to 14-micron wavelength region, a large enhancement was discovered in the emission from shadows cast on Jupiter by the Jovian satellites Ganymede and Europa. However, on the evening of 14 December 1964, the shadow of satellite Io was observed and no enhancement was detected. The effect is thus variable with time.