Release 18 of 22

Comparison of a WFPC2 Thermal Vacuum Globular Cluster-Mask Image to Wfpc1

Release date: Jun 17, 1993 12:00 AM (EDT)

After NASA Hubble Space Telescope's refurbishment to correct spherical aberration, its resolution for imaging stars is expected to increase by a factor of 10-15 over ground-based, and a factor of 2-3 over the pre-reburbished Hubble. The expected improvement in resolution is demonstrated by comparing a Hubble WFPC2 Thermal Vacuum globular cluster-mask (right panel) to a simulated view of the same globular cluster as viewed with Hubble's WFPC1 (left panel).