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How far will the Spitzer Space Telescope be able to see?

April 26, 2017able Spitzer telescope

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How far will the Spitzer Space Telescope be able to see?

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The ability to see astronomical objects will clearly depend on the luminosity (brightness) of those objects. The Spitzer Space Telescope expects to be able to see bright galaxies out to redshifts of z = 4 or more, which corresponds to about 11.5 billion light-years. Since the observable Universe is thought to be some 12-15 billion light-years in size, it should be apparent that Spitzer has the capability of observing objects in the very distant (and young) Universe.