On September 2, Justin Lee and Oliver Yeh successfully took these images of Earth's curvature and the blackness of space using only a weather balloon and off-the-shelf components—without complicated hacks. Total cost: $US148. Here's how they did it.
First up, their rig used a Canon A470 camera with 8GB SD card that they bought used on Amazon. And instead of the expensive GPS radios commonly used by weather balloons, they used a prepaid Motorola i290 GPS cell phone to receive location text messages.
The Earth's stratosphere can get as cold as -55C, but they couldn't afford expensive temperature-resistant housing. The solution: a Styrofoam beer cooler, and an instant hand warmer. Awesome.
Their low-cost balloon-launch platform reached 28 kilometres into near-space. Using the GPS phone to track its location, they found the rig 32 kilometres away from the launch site about five hours later.
Total weight was 800g. Apparently FAA regulations only apply to balloons with payloads over 1.8 kilograms. If you want all the details-including a full parts list-check our their site below.