Tanks for the space memories

Backyard-style water tanks to detect highest-energy gamma rays in a pioneer southern hemisphere project.

Lots of water tanks with cream coloured coverings outside. the sky is blue and there is a snow capped mountain in the background
An existing gamma-ray observatory, HAWC, built in Mexico. The SWGO will build a similar observatory, but much larger, to be located in Peru, South America. Credit: HAWC Collaboration.