As a research scientist at Princeton University from 1996 to 2001, Limon worked on the Wilkinson Microwave Anisotropy Probe (WMAP) project with NASA.
[2] WMAP was a NASA Explorer mission that launched June 2001 to make fundamental measurements of cosmology-the study of the properties of the universe as a whole.
Limon continued working on WMAP at NASA Goddard Space Flight Center from 2001 to 2008.
Limon is currently working on the Simons Observatory, a suite of ground-based telescopes in the Atacama Desert in Chile designed to measure the intensity and polarization of the CMB.
The Simons Observatory aims to reveal information about the contents and energy density of matter in the Universe and test theories of inflation.