Launching a scientific balloon to the edge of space is no easy feat — and one of the biggest challenges is weather. 💨🎈 Conditions have to be just right in an entire chunk of sky: from the ground where the balloon launches, through the long stretch of blue where it ascends, to some 22 miles up where it floats. The balloon also needs consistent winds and fair skies along its projected flight path, which spans hundreds of miles and changes every day — depending on the weather, of course. https://