Hubble vs Roman Space Telescope Image Size Comparisons
Released on September 20, 2016
The Nancy Grace Roman Space Telescope is a NASA observatory designed to settle essential questions in the areas of dark energy, exoplanets, and infrared astrophysics. The telescope has a primary mirror that is 2.4 meters in diameter (7.9 feet), and is the same size as the Hubble Space Telescope's primary mirror. The Roman Space Telescope will have two instruments, the Wide Field Instrument, and the Coronagraph Instrument.
The Wide Field Instrument will have a field of view that is 100 times greater than the Hubble infrared instrument, capturing more of the sky with less observing time. As the primary instrument, the Wide Field Instrument will measure light from a billion galaxies over the course of the mission lifetime. It will perform a microlensing survey of the inner Milky Way to find ~2,600 exoplanets.
Animated comparison of the relative image sizes from Hubble and the Roman Space Telescope. The two missions will have very similar resolution, but the Roman Space Telescope will have 100 times the field of view.
Older version with WFIRST name. Formatted for 5x3 hyperwall. Animated comparison of the relative image sizes of Hubble and WFIRST. The two missions will have very similar resolution, but WFIRST will have 100 times the field of view.
An accurate comparison of Hubble and WFIRST image sizes and angular resolution. WFIRST's coverage of the Andromeda Galaxy, shown here from Hubble's PHAT survey, is what the satellite will actually capture in a single image.