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originally posted by: MrMorden
I'm not sure it's a balloon. Why?
1) Balloons are essentially masses of buoyant gasses in a flexible container. They are generally NOT symmetrical or spherical. This is because the gas biases upward due to buoyancy and makes the balloon larger at the top than the bottom, making them somewhat teardrop shaped. If the balloon is inflated to very high relative pressure, it can appear more-or-less spherical, but then as it rises it will likely experience an overpressure failure (it pops), then it's *really* not spherical.
originally posted by: mbkennel
a reply to: Blue Shift
Twice a day, all over the planet, every day, there are weather balloons launched, more than a thousand per day.
Sometime, someone is going to see them do something which seems weird to them.