"STEVE's Secret Twin: Dawn's Mysterious Purple Ribbon Revealed"
Researchers have discovered a "secret twin" to the purple skyglow phenomenon known as STEVE, which appears in the predawn hours and flows eastward, opposite to STEVE's westward flow. This finding was made using data from European Space Agency's Swarm satellites and images from a Norwegian research station. The twin phenomenon, like STEVE, involves a ribbon of charged gas but had not been visually observed until now.
