NASA/JPL-Caltech/SETI Institute
There is a weird cold spot on Europa, and nobody knows what it is. The first full thermal map of Jupiter’s icy moon has thrown up one spot about 300 kilometres across that seems colder than it ought to be, and we don’t have enough data on the area to figure out why.
Samantha Trumbo at the California Institute of Technology and her colleagues used the Atacama Large Millimeter Array (ALMA), a set of 50 radio telescopes in Chile, to measure the heat radiating from Europa’s …