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WFIRST is a NASA observatory designed to settle essential questions in the areas of dark energy, exoplanets, and infrared astrophysics.

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WFIRST will have a panoramic field of view of the universe that is 100 times wider than the Hubble Space Telescope.

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WFIRST will delve into the mystery of dark energy by studying how the distribution of galaxies and dark matter has changed throughout cosmic history and by studying the observed brightness of Type Ia supernovae as a function of cosmic time.

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WFIRST will complete the statistical census of planetary systems in the galaxy by using microlensing, the universe’s own magnifying glass, to find thousands of exoplanets.

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WFIRST will use a technique called coronagraphy to block the glaring light of exoplanet host stars to directly see planets and planet-forming disks. The Coronagraph Instrument is an advanced technology demonstrator for future exoplanet missions.

In the News

Hubble constant feature

Probing the Hubble Constant with NASA’s WFIRST

Jan. 7, 2020 - Disagreement between Hubble constant predictions and measurements suggest flaws in either our measuring techniques or our model of the universe. WFIRST will help us figure out which.

About the Mission

The Wide Field Infrared Survey Telescope (WFIRST) is a NASA observatory designed to unravel the secrets of dark energy and dark matter, search for and image exoplanets, and explore many topics in infrared astrophysics.

  • WFIRST has a 2.4m telescope, the same size as Hubble’s, but with a view 100 times greater than Hubble’s.
  • WFIRST was the top-ranked large space mission in the 2010 Decadal Survey of Astronomy and Astrophysics.
  • WFIRST is slated to launch in the mid-2020s.
  • WFIRST will have no proprietary data period and all observing time will be competed.
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