Balloons

Photo taken from an observation balloon in 2006, from an altitude of 22.8 km. On the left side you can see the Teton Range and Yellowstone Lake. Source: Montana State University.

Live broadcast of the solar eclipse online from fifty balloons

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A NASA hot air balloon carrying a telescope for detecting black holes called X-Calibur. Photo: NASA/University of Washington

Searching for black holes from a telescope that will be carried by a giant balloon

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