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The SPST Science Workshop and later analyses have identified the critical projects that
drive the telescope design:
- Primary Cosmic Microwave Background (CMB) Anisotropy
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The SPST will study recombination and re-ionization in the
early Universe.
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- Sunyaev Zel'dovich Effect
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Detection of secondary CMB anisotropy towards known galaxy
clusters and blank-sky fields determines cosmological parameters.
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It is possible to detect intercluster baryon filaments which
cause the  forest towards quasars in
the space between galaxy clusters.
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- Protogalaxy Searches
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The SPST will detect thousands of submillimeter-bright
protogalaxies for further study with the ALMA and SMA. The SPST
will determine the spatial distribution of galaxies at redshifts
between z = 1 and z = 5, at scales between an arcminute
and a degree, enabling observational study of cluster formation.
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- Star-forming Cores in the Milky Way
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A complete survey at 350µm wavelength will detect all embedded
protostellar cores within 2 kpc of the Sun.
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