That flash that comes is more than 1 million times brighter than the sun.
The iron cover was only partially visible in one frame, Brownlee said.
Brownlee wanted to measure how fast the iron cap flew off the column, so he designed a second experiment: Pascal-B.
Account icon An icon in the shape of a person's head and shoulders.
The test was conducted on the night of July 26, , so the explosion coming out of the column looked like a Roman candle. Brownlee designed the Pascal-A test — the first designed to contain nuclear fallout. By the s, the US government and the public were concerned with the radiation that nuclear bombs could release into the atmosphere. On October 4, , the Soviet Union launched Sputnik, the world's first artificial satellite. Account icon An icon in the shape of a person's head and shoulders. Since it was going so fast, Brownlee said he thinks the cap likely didn't get caught in the Earth's orbit as a satellite like Sputnik and instead shot off into outer space. So in the US started conducting every nuclear test underground.