COSI (Compton Spectrometer and Imager)

COSI is illustrated in light and dark blues. The spacecraft has a hexagonal body topped with a box with various attachments. One solar panel extends to the left side of the satellite’s body.
Historical DateDecember 20, 2022
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An illustration of the COSI spacecraft. The colors depicted in this illustration are for artistic purposes only.

COSI is a gamma-ray telescope that will study energetic phenomena in the Milky Way and beyond, including the creation and destruction of matter and antimatter and the final stages of the lives of stars.

Planned launch: 2027