Every astronaut talks about the awe of seeing the blue glow of Earth from orbit. Oliver Yeh and Justin Lee, both MIT students, wanted to see Earth from above, too. They built a contraption that was able to fly to the upper reaches of the atmosphere and take photographs from high enough up to show the planet’s curvature and the blackness of space beyond. Though many devices have been built that could achieve this feat, their setup was uniquely inexpensive:
it cost less than $150.
A. Balloon
A weather balloon, which cost about $20, propelled the photo equipment to approximately 93,000 feet over about four hours. As planned, the thinning atmosphere then caused the balloon to pop, and the equipment descended in about 40 minutes with the aid of a parachute. To predict where it was likely to land, Yeh and Lee used a website maintained by the Department of Atmospheric Science at the University of Wyoming that assesses wind direction and strength. (They suggest that those who want to undertake similar projects inform the U.S. Federal Aviation Administration and check federal and local regulations first: strict laws govern the use of airspace above certain heights.)
B. Parachute
Yeh and Lee tested parachutes by attaching them to a styrofoam cooler filled with eggs and dropping it off the roof of a five-story building. Eventually, they found a design that allowed the eggs to land intact. They found that they could use a variety of materials to make the parachute–even a trash bag.
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