NBC News
A new NASA space observatory, called SPHEREx, is scheduled to launch into orbit Thursday on a mission to map more than 450 million galaxies.
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NASA space observatory poised to launch on a mission to map 450 million galaxies
Denise Chow
04:26
A new NASA space observatory, called SPHEREx, is scheduled to launch into orbit Thursday on a mission to map more than 450 million galaxies.
