Which was launched first, the Swedish satellite Odin or the Herschel Space Observatory?
Odin (satellite): Odin is a Swedish satellite working in two disciplines: astrophysics and aeronomy, and it was named after Odin of Norse mythology. Odin (satellite):  Odin is still used for aeronomical observations, including exploration of the depletion of the ozone layer and effects of global warming. Odin (satellite):  In February 2016 it celebrated 15 years in Earth orbit, and was still functioning nominally.
i don't know