The surface of Ganymede detailed from Earth

Two astronomers used the SPHERE instrument mounted on the VLT to perform high-resolution mapping of Ganymede’s surface. A feat from Earth.

Precisely map a moon of Jupiter with a Very Large Telescope spectrometer (the VLT, at Cerro Paranal, in Chile) designed to observe exoplanets? This is what two researchers from the University of Leicester (United Kingdom) did. Because Ganymede may be the largest satellite in the Solar System with more than 5260 km in diameter, it remains very difficult to detail from Earth. The performance achieved by the astronomers is therefore remarkable: they observe structures less than 150 km in size. A still poorly understood satellite In order to analyze the composition of the surface, observations of the proportion of sunlight reflected at different near-infrared wavelengths were made. We then obtain

Precisely map a moon of Jupiter with a Very Large Telescope spectrometer (the VLT, at Cerro Paranal, in Chile) designed to observe exoplanets? This is what two researchers from the University of Leicester (United Kingdom) did. Because Ganymede may be the largest satellite in the Solar System with more than 5260 km in diameter, it remains very difficult to detail from Earth. The performance achieved by the astronomers is therefore remarkable: they observe structures less than 150 km in size.

A still poorly known satellite In order to analyze the composition of the surface, observations of the proportion of reflected sunlight at different near-infrared wavelengths have been carried out. We then obtain

Mathis De Géa, Published on September 14, 2022, Modified on September 14, 2022

.

Leave a Comment