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High-altitude balloons or stratostats are usually uncrewed balloons typically filled with helium or hydrogen and released into the stratosphere, generally attaining between 18 and 37 km (11 and 23 mi; 59,000 and 121,000 ft) above sea level. In 2013, a balloon named BS 13-08 reached a record altitude of 53.7 km (33.4 mi; 176,000 ft). [1]
Conversely, if the balloon cools and drops, it becomes necessary to release ballast. Since both ballast and gas are finite, there is a limit to how long a variable-volume balloon can compensate in order to stabilize its altitude. In contrast, a superpressure balloon experiences smaller changes in altitude without compensation maneuvers. [2]
Beginning in the late 1970s, some more expensive (and longer-lasting) foil balloons made of thin, unstretchable, less permeable metallised films such as Mylar started being produced. These balloons have attractive shiny reflective surfaces and are often printed with color pictures and patterns for gifts and parties.
A weather balloon, also known as a sounding balloon, is a balloon (specifically a type of high-altitude balloon) that carries instruments to the stratosphere to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.
The 1988 edition of The Guinness Book of World Records recognizes the event as a world record "largest ever mass balloon release", with 1,429,643 balloons launched. [10] [11] Guinness no longer measures balloon releases. [12] Balloonfest '86 was the subject of the 2017 short documentary film Balloonfest. [13]
Synchronized weather balloon launches have helped meteorologists create forecasts over the past 150 years, and now the old tradition is going high tech. Twice a day - every day of the year ...
The company kept the same formulations but no longer touted its balloons for children only. Ted Vlamis said the strategy was to market balloons for everyone, “Because we all have a bit of a kid ...
A report from the Office of the Director of National Intelligence issued last month cited 366 additional sightings, mostly things like balloons, drones, birds or airborne clutter. But 171 remained ...
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