Zero 2 Infinity
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Zero 2 Infinity is a private Spanish company developing high-altitude balloons intended to provide access to near space and low Earth orbit using a balloon-borne pod and a balloon-borne launcher.
José Mariano López Urdiales in October 2019
Bloostar launch cycle
Picture taken at high altitude during the microbloon 2.0 flight from November 2012
High-altitude balloon
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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 above sea level. In 2013, a balloon named BS 13-08 reached a record altitude of 53.7 km.
The BLAST high-altitude balloon just before launch on June 12, 2005
An example image from a hobby high-altitude balloon launched by the Make Stuff Club from Kalamazoo College
A photo taken from a 1,500 g (3.3 lb) weather balloon at approximately 100,000 ft (19 mi; 30 km) above Oregon
A latex weather balloon bursting at about 29.5 km (18.3 mi; 97,000 ft)