US weather balloons are fairly small, with a diameter of about 5 feet at launch. But they expand as the air around them gets thinner. At high altitude, they’re up to 25 feet across.

Balloon circles globe, lands in history Published March 21, 1999 | Updated Sept. 29, 2005 Switzerland's Bertrand Piccard and Britain's Brian Jones pilot the Breitling Orbiter 3 in the first non ...

NASA’s super pressure balloon hit a new milestone on Tuesday, completing its first circumnavigation of the globe after 14 days, 13 hours and 17 minutes of ...

The balloon, which has a capacity of over 18 million cubic feet, carries a gamma ray telescope and a device with microphones that NASA said is “designed to record acoustic wave field activity in ...

In 2013, Google ran its first tests for Project Loon, an ambitious effort to circulate broadband-emitting balloons across the globe. On Thursday, the company said that’s not necessary anymore.

A British man is doing something that only the animators over at Pixar ever dreamed of: he wants to travel to various places across the globe using multicolored balloons to do so.

Kathmandu (Nepal), Dec 18 (ANI): Nepal will host its first-ever International Balloon Festival next week in Nepal’s Pokhara. Addressing a press conference, the organisers of Balloon Nepal Pvt ...

The Pentagon says the balloons are part of a Chinese surveillance program that has gone on for years and spanned the globe. The balloon that was recovered allegedly contained sensitive equipment ...

Departure of Jacques Charles and Marie-Noel Robert’s ‘aerostatic globe’ balloon from the Jardin des Tuileries, Paris, on Dec. 1, 1783, ...