Say goodbye to the winter sky! Here is Orion and company, with a guest appearance by Mars (with helicopter!), setting into the evening twilight on April 20, in the moonlight, from Dinosaur Provincial Park. Albertaparks #nightscape https://t.co/vGoY4HY0G4Say goodbye to the winter sky! Here is Orion and company, with a guest appearance by Mars (with helicopter!), setting into the evening twilight on April 20, in the 2907152 Say goodbye to the winter sky! Here is